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Zhukov VV, Zheng Z, Sorokin PB. Toward Superior Stiffness in Carbon: The Interplay between Bond Strength and Anisotropic Response. J Phys Chem Lett 2024:10198-10203. [PMID: 39353168 DOI: 10.1021/acs.jpclett.4c02031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2024]
Abstract
Carbon's ability to form diverse structures with varying hybridizations motivates the search for novel materials surpassing diamond's exceptional mechanical rigidity. We analyze previously predicted superhard phases and find that some exhibit average bond stiffness and density higher than those of diamond, hinting at potentially superior stiffness. However, these structures show a lower bulk modulus. We delve into this contradiction and demonstrate that it stems from the structures' anisotropic response to isotropic deformation. The concept of strain anisotropy is introduced to quantify this phenomenon. Our findings reveal a key connection between bond stiffness and bulk modulus in carbon materials, highlighting the importance of considering anisotropic behavior for a comprehensive understanding of the mechanical properties.
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Affiliation(s)
- Vladlen V Zhukov
- Technological Institute for Superhard and Novel Carbon Materials, 108840, 7a Tsentralnaya street, Troitsk, Moscow, Russian Federation
- Laboratory of Digital Material Science, National University of Science and Technology MISiS, 119049, Leninskiy prospekt 4, Moscow, Russian Federation
| | - Zhifeng Zheng
- Key Laboratory of Advanced Energy Storage Technology, Fujian Province University, Fujian Provincial Industry Technologies Development Base for New Energy, Collaborative Innovation Platform for Advanced Electrochemical Energy Storage Technology, National User-Side Energy Storage Innovation Research and Development Center, and College of Energy, Xiamen University, Xiamen 361102, P.R. China
- Tan Kah Kee Innovation Laboratory (IKKEM), Xiamen 361102, P.R. China
| | - Pavel B Sorokin
- Technological Institute for Superhard and Novel Carbon Materials, 108840, 7a Tsentralnaya street, Troitsk, Moscow, Russian Federation
- Laboratory of Digital Material Science, National University of Science and Technology MISiS, 119049, Leninskiy prospekt 4, Moscow, Russian Federation
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2
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Shi J, Liang Z, Wang J, Pan S, Ding C, Wang Y, Wang HT, Xing D, Sun J. Double-Shock Compression Pathways from Diamond to BC8 Carbon. PHYSICAL REVIEW LETTERS 2023; 131:146101. [PMID: 37862650 DOI: 10.1103/physrevlett.131.146101] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 07/11/2023] [Accepted: 09/08/2023] [Indexed: 10/22/2023]
Abstract
Carbon is one of the most important elements for both industrial applications and fundamental research, including life, physics, chemistry, materials, and even planetary science. Although theoretical predictions on the transition from diamond to the BC8 (Ia3[over ¯]) carbon were made more than thirty years ago, after tremendous experimental efforts, direct evidence for the existence of BC8 carbon is still lacking. In this study, a machine learning potential was developed for high-pressure carbon fitted from first-principles calculations, which exhibited great capabilities in modeling the melting and Hugoniot line. Using the molecular dynamics based on this machine learning potential, we designed a thermodynamic pathway that is achievable for the double shock compression experiment to obtain the elusive BC8 carbon. Diamond was compressed up to 584 GPa after the first shock at 20.5 km/s. Subsequently, in the second shock compression at 24.8 or 25.0 km/s, diamond was compressed to a supercooled liquid and then solidified to BC8 in around 1 ns. Furthermore, the critical nucleus size and nucleation rate of BC8 were calculated, which are crucial for nano-second x-ray diffraction measurements to observe BC8 carbon during shock compressions. The key to obtaining BC8 carbon lies in the formation of liquid at a sufficient supercooling. Our work provides a feasible pathway by which the long-sought BC8 phase of carbon can be reached in experiments.
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Affiliation(s)
- Jiuyang Shi
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Zhixing Liang
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Junjie Wang
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Shuning Pan
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Chi Ding
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Yong Wang
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Hui-Tian Wang
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Dingyu Xing
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Jian Sun
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, People's Republic of China
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Serghiou G, Odling N, Reichmann HJ, Ji G, Koch-Müller M, Frost DJ, Wright JP, Boehler R, Morgenroth W. Hexagonal Si-Ge Class of Semiconducting Alloys Prepared by Using Pressure and Temperature. Chemistry 2021; 27:14217-14224. [PMID: 34459046 DOI: 10.1002/chem.202102595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Indexed: 11/06/2022]
Abstract
Multi-anvil and laser-heated diamond anvil methods have been used to subject Ge and Si mixtures to pressures and temperatures of between 12 and 17 GPa and 1500-1800 K, respectively. Synchrotron angle dispersive X-ray diffraction, precession electron diffraction and chemical analysis using electron microscopy, reveal recovery at ambient pressure of hexagonal Ge-Si solid solutions (P63 /mmc). Taken together, the multi-anvil and diamond anvil results reveal that hexagonal solid solutions can be prepared for all Ge-Si compositions. This hexagonal class of solid solutions constitutes a significant expansion of the bulk Ge-Si solid solution family, and is of interest for optoelectronic applications.
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Affiliation(s)
- George Serghiou
- University of Edinburgh, School of Engineering, Kings Buildings, Robert Stevenson Road, Edinburgh, EH9 3FB, UK
| | - Nicholas Odling
- University of Edinburgh, School of Geosciences, The Grant Institute, Kings Buildings, West Mains Road, Edinburgh, EH9 3JW, UK
| | - Hans Josef Reichmann
- Helmholtz Centre Potsdam, German Research Centre for Geosciences, Telegrafenberg, 14473, Potsdam, Germany
| | - Gang Ji
- Univ. Lille, CNRS, INRA, ENSCL, UMR CNRS 8207, UMET, Unité Matériaux et Transformations, 59000, Lille, France
| | - Monika Koch-Müller
- Helmholtz Centre Potsdam, German Research Centre for Geosciences, Telegrafenberg, 14473, Potsdam, Germany
| | - Daniel J Frost
- Bayerisches Geoinstitut, University of Bayreuth, 95540, Bayreuth, Germany
| | | | - Reinhard Boehler
- Oak Ridge National Laboratory, Bethel Valley Rd, Oak Ridge, TN 37830, USA
| | - Wolfgang Morgenroth
- Institute of Geosciences, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany.,Deutsches Elektronen-Synchrotron (DESY), 22607, Hamburg, Germany.,University of Potsdam, Institute of Geosciences, 14476, Potsdam, Germany
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4
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Metastability of diamond ramp-compressed to 2 terapascals. Nature 2021; 589:532-535. [PMID: 33505034 DOI: 10.1038/s41586-020-03140-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 10/26/2020] [Indexed: 11/08/2022]
Abstract
Carbon is the fourth-most prevalent element in the Universe and essential for all known life. In the elemental form it is found in multiple allotropes, including graphite, diamond and fullerenes, and it has long been predicted that even more structures can exist at pressures greater than those at Earth's core1-3. Several phases have been predicted to exist in the multi-terapascal regime, which is important for accurate modelling of the interiors of carbon-rich exoplanets4,5. By compressing solid carbon to 2 terapascals (20 million atmospheres; more than five times the pressure at Earth's core) using ramp-shaped laser pulses and simultaneously measuring nanosecond-duration time-resolved X-ray diffraction, we found that solid carbon retains the diamond structure far beyond its regime of predicted stability. The results confirm predictions that the strength of the tetrahedral molecular orbital bonds in diamond persists under enormous pressure, resulting in large energy barriers that hinder conversion to more-stable high-pressure allotropes1,2, just as graphite formation from metastable diamond is kinetically hindered at atmospheric pressure. This work nearly doubles the highest pressure at which X-ray diffraction has been recorded on any material.
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Liu Z, Xin H, Fu L, Liu Y, Song T, Cui X, Zhao G, Zhao J. All-Silicon Topological Semimetals with Closed Nodal Line. J Phys Chem Lett 2019; 10:244-250. [PMID: 30540479 DOI: 10.1021/acs.jpclett.8b03345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Because of the natural compatibility with current semiconductor industry, silicon allotropes with diverse structural and electronic properties provide promising platforms for next-generation Si-based devices. After screening 230 all-silicon crystals in the zeolite frameworks by first-principles calculations, we disclose two structurally stable Si allotropes (AHT-Si24 and VFI-Si36) containing open channels as topological node-line semimetals with Dirac nodal points forming a nodal loop in the k z = 0 plane of the Brillouin zone. Interestingly, their nodal loops protected by inversion and time-reversal symmetries are robust against SU(2) symmetry breaking because of the very weak spin-orbit coupling of Si. When the nodal lines are projected onto the (001) surface, flat surface bands can be observed because of the nontrivial topology of the bulk band structures. Our discoveries extend the topological physics to the three-dimensional Si materials, highlighting the possibility of realizing low-cost, nontoxic, and semiconductor-compatible Si-based electronics with topological quantum states.
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Affiliation(s)
- Zhifeng Liu
- School of Physical Science and Technology , Inner Mongolia University , Hohhot 010021 , China
- Beijing Computational Science Research Center , Beijing 100094 , China
| | - Hongli Xin
- School of Physical Science and Technology , Inner Mongolia University , Hohhot 010021 , China
| | - Li Fu
- School of Physical Science and Technology , Inner Mongolia University , Hohhot 010021 , China
| | - Yingqiao Liu
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams , Dalian University of Technology , Ministry of Education, Dalian 116024 , China
| | - Tielei Song
- School of Physical Science and Technology , Inner Mongolia University , Hohhot 010021 , China
| | - Xin Cui
- School of Physical Science and Technology , Inner Mongolia University , Hohhot 010021 , China
| | - Guojun Zhao
- School of Physical Science and Technology , Inner Mongolia University , Hohhot 010021 , China
| | - Jijun Zhao
- Beijing Computational Science Research Center , Beijing 100094 , China
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams , Dalian University of Technology , Ministry of Education, Dalian 116024 , China
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6
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Sung HJ, Han WH, Lee IH, Chang KJ. Superconducting Open-Framework Allotrope of Silicon at Ambient Pressure. PHYSICAL REVIEW LETTERS 2018; 120:157001. [PMID: 29756903 DOI: 10.1103/physrevlett.120.157001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Indexed: 06/08/2023]
Abstract
Diamond Si is a semiconductor with an indirect band gap that is the basis of modern semiconductor technology. Although many metastable forms of Si were observed using diamond anvil cells for compression and chemical precursors for synthesis, no metallic phase at ambient conditions has been reported thus far. Here we report the prediction of pure metallic Si allotropes with open channels at ambient pressure, unlike a cubic diamond structure in covalent bonding networks. The metallic phase termed P6/m-Si_{6} can be obtained by removing Na after pressure release from a novel Na-Si clathrate called P6/m-NaSi_{6}, which is predicted through first-principles study at high pressure. We identify that both P6/m-NaSi_{6} and P6/m-Si_{6} are stable and superconducting with the critical temperatures of about 13 and 12 K at ambient pressure, respectively. The prediction of new Na-Si and Si clathrate structures presents the possibility of exploring new exotic allotropes useful for Si-based devices.
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Affiliation(s)
- Ha-Jun Sung
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
| | - W H Han
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
| | - In-Ho Lee
- Korea Research Institute of Standards and Science, Daejeon 34113, Korea
| | - K J Chang
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
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7
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Zhang H, Liu H, Wei K, Kurakevych OO, Le Godec Y, Liu Z, Martin J, Guerrette M, Nolas GS, Strobel TA. BC8 Silicon (Si-III) is a Narrow-Gap Semiconductor. PHYSICAL REVIEW LETTERS 2017; 118:146601. [PMID: 28430499 DOI: 10.1103/physrevlett.118.146601] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Indexed: 06/07/2023]
Abstract
Large-volume, phase-pure synthesis of BC8 silicon (Ia3[over ¯], cI16) has enabled bulk measurements of optical, electronic, and thermal properties. Unlike previous reports that conclude BC8-Si is semimetallic, we demonstrate that this phase is a direct band gap semiconductor with a very small energy gap and moderate carrier concentration and mobility at room temperature, based on far- and midinfrared optical spectroscopy, temperature-dependent electrical conductivity, Seebeck and heat capacity measurements. Samples exhibit a plasma wavelength near 11 μm, indicating potential for infrared plasmonic applications. Thermal conductivity is reduced by 1-2 orders of magnitude depending on temperature as compared with the diamond cubic (DC-Si) phase. The electronic structure and dielectric properties can be reproduced by first-principles calculations with hybrid functionals after adjusting the level of exact Hartree-Fock (HF) exchange mixing. These results clarify existing limited and controversial experimental data sets and ab initio calculations.
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Affiliation(s)
- Haidong Zhang
- Geophysical Laboratory, Carnegie Institution of Washington, Washington DC 20015, USA
| | - Hanyu Liu
- Geophysical Laboratory, Carnegie Institution of Washington, Washington DC 20015, USA
| | - Kaya Wei
- Department of Physics, University of South Florida, Tampa, Florida 33620, USA
| | - Oleksandr O Kurakevych
- IMPMC, UPMC Sorbonne Universités, UMR CNRS 7590, Muséum National d'Histoire Naturelle, IRD UMR 206, F-75005 Paris, France
| | - Yann Le Godec
- IMPMC, UPMC Sorbonne Universités, UMR CNRS 7590, Muséum National d'Histoire Naturelle, IRD UMR 206, F-75005 Paris, France
| | - Zhenxian Liu
- Geophysical Laboratory, Carnegie Institution of Washington, Washington DC 20015, USA
| | - Joshua Martin
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - Michael Guerrette
- Geophysical Laboratory, Carnegie Institution of Washington, Washington DC 20015, USA
| | - George S Nolas
- Department of Physics, University of South Florida, Tampa, Florida 33620, USA
| | - Timothy A Strobel
- Geophysical Laboratory, Carnegie Institution of Washington, Washington DC 20015, USA
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8
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Yin WJ, Chen YP, Xie YE, Liu LM, Zhang SB. A low-surface energy carbon allotrope: the case for bcc-C6. Phys Chem Chem Phys 2015; 17:14083-7. [DOI: 10.1039/c5cp00803d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Graphite may be viewed as a low-surface-energy carbon allotrope with little layer–layer interaction.
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Affiliation(s)
- Wen-Jin Yin
- Department of Physics
- Xiangtan University
- Xiangtan 411105
- China
- Beijing Computational Science Research Center
| | - Yuan-Ping Chen
- Department of Physics
- Xiangtan University
- Xiangtan 411105
- China
| | - Yue-E. Xie
- Department of Physics
- Xiangtan University
- Xiangtan 411105
- China
| | - Li-Min Liu
- Beijing Computational Science Research Center
- China
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9
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Sun J, Klug DD, Martoňák R. Structural transformations in carbon under extreme pressure: Beyond diamond. J Chem Phys 2009; 130:194512. [DOI: 10.1063/1.3139060] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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10
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Correa AA, Bonev SA, Galli G. Carbon under extreme conditions: phase boundaries and electronic properties from first-principles theory. Proc Natl Acad Sci U S A 2006; 103:1204-8. [PMID: 16432191 PMCID: PMC1345714 DOI: 10.1073/pnas.0510489103] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2005] [Indexed: 11/18/2022] Open
Abstract
At high pressure and temperature, the phase diagram of elemental carbon is poorly known. We present predictions of diamond and BC8 melting lines and their phase boundary in the solid phase, as obtained from first-principles calculations. Maxima are found in both melting lines, with a triple point located at approximately 850 GPa and approximately 7,400 K. Our results show that hot, compressed diamond is a semiconductor that undergoes metalization upon melting. In contrast, in the stability range of BC8, an insulator to metal transition is likely to occur in the solid phase. Close to the diamond/liquid and BC8/liquid boundaries, molten carbon is a low-coordinated metal retaining some covalent character in its bonding up to extreme pressures. Our results provide constraints on the carbon equation of state, which is of critical importance for devising models of Neptune, Uranus, and white dwarf stars, as well as of extrasolar carbon-rich planets.
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Affiliation(s)
- Alfredo A Correa
- Department of Physics, University of California, Berkeley, CA 94720, USA
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11
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Wang X, Scandolo S, Car R. Carbon phase diagram from ab initio molecular dynamics. PHYSICAL REVIEW LETTERS 2005; 95:185701. [PMID: 16383918 DOI: 10.1103/physrevlett.95.185701] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2005] [Indexed: 05/05/2023]
Abstract
We compute the free energy of solid and liquid diamond from first-principles electronic structure theory using efficient thermodynamic integration techniques. Our calculated melting curve is in excellent agreement with the experimental estimate of the graphite-diamond-liquid triple point and is consistent with shock wave experiments. We predict the phase diagram of diamond at pressures and temperatures that are difficult to access experimentally. We confirm early speculations on the presence of a reentrant point in the diamond melting line but find no evidence for a first order liquid-liquid phase transition near the reentrant point.
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Affiliation(s)
- Xiaofei Wang
- Department of Chemistry and Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544, USA
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13
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Prediction of a nanoporous sp2-carbon framework structure by combining graph theory with quantum mechanics. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(99)00943-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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15
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Balaban AT. Theoretical investigation of carbon nets and molecules. THEORETICAL AND COMPUTATIONAL CHEMISTRY 1998. [DOI: 10.1016/s1380-7323(98)80014-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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16
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Grumbach MP, Martin RM. Phase diagram of carbon at high pressures and temperatures. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:15730-15741. [PMID: 9985640 DOI: 10.1103/physrevb.54.15730] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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17
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Demkov AA, Windl W, Sankey OF. Expanded-volume phases of silicon: Zeolites without oxygen. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:11288-11291. [PMID: 9982733 DOI: 10.1103/physrevb.53.11288] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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18
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Clark SJ, Ackland GJ, Crain J. Theoretical stability limit of diamond at ultrahigh pressure. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:15035-15038. [PMID: 9980844 DOI: 10.1103/physrevb.52.15035] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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19
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Mujica A, Needs RJ, Muñoz A. First-principles pseudopotential study of the phase stability of the III-V semiconductors GaAs and AlAs. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:8881-8892. [PMID: 9979878 DOI: 10.1103/physrevb.52.8881] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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20
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Ballone P, Rubini S. Embedded-atom model of glass-forming Si-metal alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:14962-14975. [PMID: 9978450 DOI: 10.1103/physrevb.51.14962] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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21
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Needs RJ, Mujica A. First-principles pseudopotential study of the structural phases of silicon. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:9652-9660. [PMID: 9977630 DOI: 10.1103/physrevb.51.9652] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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22
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Crain J, Ackland GJ, Maclean JR, Piltz RO, Hatton PD, Pawley GS. Reversible pressure-induced structural transitions between metastable phases of silicon. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:13043-13046. [PMID: 9975487 DOI: 10.1103/physrevb.50.13043] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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23
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Kirchhoff F, Binggeli N, Galli G, Massidda S. Structural and bonding properties of solid tellurium from first-principles calculations. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:9063-9071. [PMID: 9974948 DOI: 10.1103/physrevb.50.9063] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Crain J, Piltz RO, Ackland GJ, Clark SJ, Payne MC, Milman V, Lin JS, Hatton PD, Nam YH. Tetrahedral structures and phase transitions in III-V semiconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:8389-8401. [PMID: 9974857 DOI: 10.1103/physrevb.50.8389] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Clark SJ, Ackland GJ, Crain J, Payne MC. Very low energy surface of silicon. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:5728-5731. [PMID: 9976925 DOI: 10.1103/physrevb.50.5728] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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26
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Crain J, Clark SJ, Ackland GJ, Payne MC, Milman V, Hatton PD, Reid BJ. Theoretical study of high-density phases of covalent semiconductors. I. Ab initio treatment. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:5329-5340. [PMID: 10011485 DOI: 10.1103/physrevb.49.5329] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Mujica A, Needs RJ. First-principles calculations of the structural properties, stability, and band structure of complex tetrahedral phases of germanium: ST12 and BC8. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:17010-17017. [PMID: 10008302 DOI: 10.1103/physrevb.48.17010] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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28
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Nelmes RJ, McMahon MI, Wright NG, Allan DR, Loveday JS. Stability and crystal structure of BC8 germanium. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:9883-9886. [PMID: 10007250 DOI: 10.1103/physrevb.48.9883] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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29
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Nesper R, Vogel K, Blöchl PE. Hypothetische Kohlenstoffmodifikationen mit Zeolith-analogen Strukturen. Angew Chem Int Ed Engl 1993. [DOI: 10.1002/ange.19931050536] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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30
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McMahon MI, Nelmes RJ. New high-pressure phase of Si. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:8337-8340. [PMID: 10004861 DOI: 10.1103/physrevb.47.8337] [Citation(s) in RCA: 119] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Venkateswaran UD, Cui LJ, Weinstein BA, Chambers FA. Forward and reverse high-pressure transitions in bulklike AlAs and GaAs epilayers. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:9237-9247. [PMID: 10000789 DOI: 10.1103/physrevb.45.9237] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Cui LJ, Venkateswaran UD, Weinstein BA, Chambers FA. Polymorphic stability of AlAs/GaAs superlattices at high pressure. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:9248-9265. [PMID: 10000790 DOI: 10.1103/physrevb.45.9248] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Abstract
Melting of diamond at high pressure and the properties of liquid carbon at pressures greater than 1 megabar were investigated with a first-principles molecular dynamics technique. The results indicate an increase of the diamond melting temperature with pressure, which is opposite to the behavior of silicon and germanium. This is contrary to long-held assumptions, but agrees with recent experiments, and has important implications for geology and astrophysics. As is the case for the solid phase of carbon at low temperature, which changes greatly with pressure from graphite to diamond, the structural and bonding properties of liquid carbon vary strongly with pressure.
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Galli G, Martin RM, Car R, Parrinello M. Ab initio calculation of properties of carbon in the amorphous and liquid states. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:7470-7482. [PMID: 9994892 DOI: 10.1103/physrevb.42.7470] [Citation(s) in RCA: 91] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Tersoff J. Empirical interatomic potential for carbon, with application to amorphous carbon. PHYSICAL REVIEW LETTERS 1988; 61:2879-2882. [PMID: 10039251 DOI: 10.1103/physrevlett.61.2879] [Citation(s) in RCA: 458] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Tersoff J. Empirical interatomic potential for silicon with improved elastic properties. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:9902-9905. [PMID: 9945814 DOI: 10.1103/physrevb.38.9902] [Citation(s) in RCA: 262] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Vergés JA, Alouani M, Christensen NE. Calculated electronic properties of tetragonal crystalline Si-Ge alloys: Comparison to amorphous phases. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:1378-1383. [PMID: 9946400 DOI: 10.1103/physrevb.38.1378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Parthasarathy G, Holzapfel WB. High-pressure structural phase transitions in tellurium. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:8499-8501. [PMID: 9944203 DOI: 10.1103/physrevb.37.8499] [Citation(s) in RCA: 119] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Froyen S, Wood DM, Zunger A. Structural and electronic properties of epitaxial thin-layer SinGen superlattices. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:6893-6907. [PMID: 9943959 DOI: 10.1103/physrevb.37.6893] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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