1
|
Optimization of Ca14MgSb11 through Chemical Substitutions on Sb Sites: Optimizing Seebeck Coefficient and Resistivity Simultaneously. CRYSTALS 2018. [DOI: 10.3390/cryst8050211] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
2
|
Zhang X, Yi N, Hoffmann R, Zheng C, Lin J, Huang F. Semiconductive K2MSbS3(SH) (M = Zn, Cd) Featuring One-Dimensional ∞1[M2Sb2S6(SH2)]4– Chains. Inorg Chem 2016; 55:9742-9747. [DOI: 10.1021/acs.inorgchem.6b01529] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xian Zhang
- Beijing
National Laboratory for Molecular Sciences and State Key Laboratory
of Rare Earth Materials Chemistry and Applications, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Na Yi
- State
Key Laboratory of High Performance Ceramics and Superfine Microstructure,
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China
| | - Roald Hoffmann
- Department
of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Chong Zheng
- Department
of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115, United States
| | - Jianhua Lin
- Beijing
National Laboratory for Molecular Sciences and State Key Laboratory
of Rare Earth Materials Chemistry and Applications, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Fuqiang Huang
- Beijing
National Laboratory for Molecular Sciences and State Key Laboratory
of Rare Earth Materials Chemistry and Applications, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, P. R. China
- State
Key Laboratory of High Performance Ceramics and Superfine Microstructure,
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China
| |
Collapse
|
3
|
Oshchapovsky I, Pavlyuk V, Dmytriv G, Harbrecht B. Penta-lanthanum zinc diplumbide, La5Zn1-x Pb2+x (x ≃ 0.6). Acta Crystallogr Sect E Struct Rep Online 2014; 70:i2-i3. [PMID: 24526938 PMCID: PMC3914033 DOI: 10.1107/s1600536813033618] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 12/11/2013] [Indexed: 11/11/2022]
Abstract
The title non-stoichiometric penta-lanthanum zinc diplumbide, La5Zn1-x Pb2+x (x ≃ 0.6), was prepared from the elements in an evacuated silica ampoule. It adopts the Nb5Sn2Si-type structure (space group I4/mcm, Pearson symbol tI32), a ternary ordered superstructure of the W5Si3 type. Among the four independent crystallographic positions, three are fully occupied by La (Wyckoff 16k), La (4b), and Pb (8h) and one is occupied by a statistical mixture [occupancy ratio 0.394 (12):0.606 (12)] of Zn and Pb (4a). The structure is constructed by face-sharing 10-vertex polyhedra around the unmixed Pb sites. These fragments enclose channels of trans-face-sharing tetra-gonal anti-prisms occupied by the disordered Zn and Pb sites.
Collapse
Affiliation(s)
- Igor Oshchapovsky
- Department of Inorganic Chemistry, Ivan Franko Lviv National University, Kyryla i Mefodia str. 6, 79005 Lviv, Ukraine
- Department of Chemistry and Materials Science Centre, Philipps University of Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
| | - Volodymyr Pavlyuk
- Department of Inorganic Chemistry, Ivan Franko Lviv National University, Kyryla i Mefodia str. 6, 79005 Lviv, Ukraine
| | - Grygoriy Dmytriv
- Department of Inorganic Chemistry, Ivan Franko Lviv National University, Kyryla i Mefodia str. 6, 79005 Lviv, Ukraine
| | - Bernd Harbrecht
- Department of Chemistry and Materials Science Centre, Philipps University of Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
| |
Collapse
|
4
|
Abstract
ABSTRACTWe review the interpretation of multiple-scattering theory in terms of muffin-tin orbitals. The use of slightly overlapping muffin-tin wells is justified rigorously. It is shown that the structure constants may be screened for a useful range of positive and negative energies, and that the screening may be chosen to yield desirable properties of the KKR matrix. Energy linearization and the linear muffin-tin-orbital method are discussed.
Collapse
|
5
|
Andersen OK, Arcangeli C, Tank RW, Saha-Dasgupta T, Krier G, Jepsen O, Dasgupta I. Third-Generation TB-LMTO. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-491-3] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTWe describe the screened Korringa-Kohn-Rostoker (KKR) method and the third-generation linear muffin-tin orbital (LMTO) method for solving the single-particle Schrödinger equation for a MT potential. In the screened KKR method, the eigenvectors CRL,i are given as the non-zero solutions, and the energies εi as those for which such solutions can be found, of the linear homogeneous equations: , where Ka (ε) is the screened KKR matrix. The screening is specified by the boundary condition that, when a screened spherical wave is expanded in spherical harmonics YR′L′ (ȓR′) about its neighboring sites R′, then each component either vanishes at a radius, rR′=aR′L′, or is a regular solution at that site. When the corresponding “hard” spheres are chosen to be nearly touching, then the KKR matrix is usually short ranged and its energy dependence smooth over a range of order 1 Ry around the centre of the valence band. The KKR matrix, K (εν), at a fixed, arbitrary energy turns out to be the negative of the Hamiltonian, and its first energy derivative, K (εν), to be the overlap matrix in a basis of kinked partial waves, φRL (εν, rR), each of which is a partial wave inside the MT-sphere, tailed with a screened spherical wave in the interstitial, or taking the other point of view, a screened spherical wave in the interstitial, augmented by a partial wave inside the sphere. When of short range, K (ε) has the two-centre tight-binding (TB) form and can be generated in real space, simply by inversion of a positive definite matrix for a cluster. The LMTOs, χRL (εν), are smooth orbitals constructed from φRL(εν, rR) and φRL(εν, rR), and the Hamiltonian and overlap matrices in the basis of LMTOs are expressed solely in terms of K (εν) and its first three energy derivatives. The errors of the single-particle energies εi obtained from the Hamiltonian and overlap matrices in the φ(εν)- and χ(εν) bases are respectively of second and fourth order in εi – εi. Third-generation LMTO sets give wave functions which are correct to order εi – εν, not only inside the MT spheres, but also in the interstitial region. As a consequence, the simple and popular formalism which previously resulted from the atomic-spheres approximation (ASA) now holds in general, that is, it includes downfolding and the combined correction. Downfolding to few-orbital, possibly short-ranged, low-energy, and possibly orthonormal Hamiltonians now works exceedingly well, as is demonstrated for a high-temperature superconductor. First-principles sp3 and sp3d5 TB Hamiltonians for the valence and lowest conduction bands of silicon are derived. Finally, we prove that the new method treats overlap of the potential wells correctly to leading order and we demonstrate how this can be exploited to get rid of the empty spheres in the diamond structure.
Collapse
|
6
|
Mirzoev AA, Mirzoev AA, Sobolev AN, Gelchinski BR. Analysis of the electronic structure of liquid rubidium by the methods of ab initio molecular dynamics, linear muffin-tin orbitals and recursion. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2008; 20:114104. [PMID: 21694197 DOI: 10.1088/0953-8984/20/11/114104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
It is well known that liquid rubidium shows some unusual properties at low densities. The ab initio SIESTA package and the supercell technique within the linear muffin-tin orbital method were used to investigate this phenomenon. Electronic structures of liquid rubidium at different temperatures from the melting point up to the critical point were obtained. The atomic structure for the supercell technique was simulated for a cluster of 4000 atoms by the Schommers method on the basis of experimental structure factors of Rb obtained by Tamura and co-workers at different temperatures (from 373 up to 1973 K). The Kubo-Greenwood formula was applied for the calculations of the melt conductivity. The results obtained indicate that the metal-nonmetal transition in liquid rubidium is not connected to the gap at the Fermi energy in the density of electronic states, but, more likely, with electron localization on some kind of atomic cluster.
Collapse
Affiliation(s)
- A A Mirzoev
- South Ural State University, Prospekt Lenina, 76, Chelyabinsk, 454080, Russia
| | | | | | | |
Collapse
|
7
|
Shveikin GP, Ivanovskii AL. The chemical bonding and electronic properties of metal borides. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1994v063n09abeh000114] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
8
|
Bekhti-Siad A, Mokrani A, Demangeat C, Khelil A. Magnetism of 3d transition metal/germanium compounds with Al2Cu structure. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.theochem.2006.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
9
|
Hirata A, Hirotsu Y, Ohkubo T, Matsubara E, Makino A. Local structure studies of Fe-Nb-B metallic glasses using electron diffraction. J Microsc 2006; 223:191-4. [PMID: 17059527 DOI: 10.1111/j.1365-2818.2006.01617.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Local atomic structures in Fe(84)Nb(7)B(9) and Fe(70)Nb(10)B(20) amorphous alloys were examined by means of electron diffraction with the help of computer calculation. Electron diffraction patterns were taken by using energy-filtered transmission electron microscopy (TEM) to eliminate inelastic scattering. We constructed structure models with 5000 atoms fitting to experimental interference functions. Voronoi polyhedral analyses were performed for the obtained final structure models. Local atomic structures of the alloys were closely related to those of the crystalline phases that appeared on annealing. A difference of stability of two amorphous phases was discussed on the basis of structure models.
Collapse
Affiliation(s)
- A Hirata
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, Japan.
| | | | | | | | | |
Collapse
|
10
|
Chemisorption of Co monolayer on H-passivated Si(111) surface: Comparison with clean Si(111) surface. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.08.133] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
11
|
|
12
|
|
13
|
|
14
|
Chan C, Ho K, Bohnen K. Surface Reconstruction: Metal Surfaces and Metal on Semiconductor Surfaces. HANDBOOK OF SURFACE SCIENCE 1996. [DOI: 10.1016/s1573-4331(96)80008-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
15
|
Kontsevoi OY, Gubanov VA. First-principles calculations of the electronic structure and magnetic properties of 3d transition-metal impurities in bcc and amorphous iron. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:15125-15131. [PMID: 9978466 DOI: 10.1103/physrevb.51.15125] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
16
|
Saha T, Dasgupta I, Mookerjee A. Augmented-space recursive method for the study of short-ranged ordering effects in binary alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:13267-13275. [PMID: 9975518 DOI: 10.1103/physrevb.50.13267] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
17
|
Kakehashi Y, Yu M. Theory of amorphous metallic magnetism with self-consistent amplitude fluctuations and its application to amorphous Fe. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:6189-6198. [PMID: 9976993 DOI: 10.1103/physrevb.50.6189] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
18
|
Becker C, Hafner J. Structural, electronic, and magnetic properties of Fe-Y alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:3913-3930. [PMID: 9976670 DOI: 10.1103/physrevb.50.3913] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
19
|
Lammers U, Borstel G. Electronic and atomic structure of copper clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:17360-17377. [PMID: 10010918 DOI: 10.1103/physrevb.49.17360] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
20
|
Tanaka H, Fujiwara T. Scheme for an ab initio real-space calculation of the electronic structure in large disordered systems. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:11440-11443. [PMID: 10009999 DOI: 10.1103/physrevb.49.11440] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
21
|
Singh PP, Gonis A. Electronic structure of metallic alloys using charge-neutral atomic spheres. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:1642-1646. [PMID: 10010953 DOI: 10.1103/physrevb.49.1642] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
22
|
Hafner J, Tegze M, Becker C. Amorphous magnetism in Fe-B alloys: First-principles spin-polarized electronic-structure calculations. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:285-298. [PMID: 10009285 DOI: 10.1103/physrevb.49.285] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
23
|
Bratkovsky AM, Smirnov AV. Amorphous magnetism in iron-boron systems: First-principles real-space tight-binding LMTO study. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:9606-9610. [PMID: 10007204 DOI: 10.1103/physrevb.48.9606] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
24
|
Bratkovsky AM, Rashkeev SN, Wendin G. Electronic structure, ferromagnetism, and EELS spectra of crystalline alloys FenB and NinB (n=1,2,3): Aspects of universal behavior. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:6260-6270. [PMID: 10009171 DOI: 10.1103/physrevb.48.6260] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
25
|
Bose SK, Jepsen O, Andersen OK. Real-space calculation of the electrical resistivity of liquid 3d transition metals using tight-binding linear muffin-tin orbitals. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:4265-4275. [PMID: 10008897 DOI: 10.1103/physrevb.48.4265] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
26
|
Singh PP, Gonis A. Coherent-potential approximation in the tight-binding linear muffin-tin orbital method. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:1989-1992. [PMID: 10008581 DOI: 10.1103/physrevb.48.1989] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
27
|
Hafner J, Krajcí M. Electronic structure of quasicrystalline Al-Zn-Mg alloys and related crystalline, amorphous, and liquid phases. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:11795-11809. [PMID: 10005349 DOI: 10.1103/physrevb.47.11795] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
28
|
Kakehashi Y, Tanaka H, Yu M. Simple theory of electronic-structure calculations for amorphous transition-metal alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:7736-7746. [PMID: 10004781 DOI: 10.1103/physrevb.47.7736] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
29
|
Stokbro K, Jacobsen KW. Simple model of stacking-fault energies. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:4916-4921. [PMID: 10006651 DOI: 10.1103/physrevb.47.4916] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
30
|
Kakehashi Y. Magnetism in amorphous transition metals. II. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:3185-3195. [PMID: 10006401 DOI: 10.1103/physrevb.47.3185] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
31
|
Frota-Pessôa S. First-principles real-space linear-muffin-tin-orbital calculations of 3d impurities in Cu. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:14570-14577. [PMID: 10003560 DOI: 10.1103/physrevb.46.14570] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
32
|
Chetty N, Stokbro K, Jacobsen KW, Norskov JK. Ab initio potential for solids. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:3798-3809. [PMID: 10004103 DOI: 10.1103/physrevb.46.3798] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
33
|
Peduto PR, Frota-Pessa S, Methfessel MS. First-principles linear muffin-tin orbital atomic-sphere approximation calculations in real space. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:13283-13290. [PMID: 9999529 DOI: 10.1103/physrevb.44.13283] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|