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Feng J, Li C, Deng W, Lin B, Liu W, Susilo RA, Dong H, Chen Z, Zhou N, Yi X, Xing X, Ke F, Liu Z, Sheng H, Shi Z, Chen B. Superconductivity Induced by Lifshitz Transition in Pristine SnS 2 under High Pressure. J Phys Chem Lett 2022; 13:9404-9410. [PMID: 36191043 DOI: 10.1021/acs.jpclett.2c02580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The importance of electronic structure evolutions and reconstitutions is widely acknowledged for strongly correlated systems. The precise effect of pressurized Fermi surface topology on metallization and superconductivity is a much-debated topic. In this work, an evolution from insulating to metallic behavior, followed by a superconducting transition, is systematically investigated in SnS2 under high pressure. In-situ X-ray diffraction measurements show the stability of the trigonal structure under compression. Interestingly, a Lifshitz transition, which has an important bearing on the metallization and superconductivity, is identified by the first-principles calculations between 35 and 40 GPa. Our findings provide a unique playground for exploring the relationship of electronic structure, metallization, and superconductivity under high pressure without crystal structural collapse.
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Affiliation(s)
- Jiajia Feng
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, People's Republic of China
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
| | - Cong Li
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
- Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Wen Deng
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
| | - Bencheng Lin
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, People's Republic of China
| | - Wenhui Liu
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, People's Republic of China
| | - Resta A Susilo
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
- Department of Physics, Pohang University of Science and Technology, Pohang 37673, Korea
| | - Hongliang Dong
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
| | - Zhiqiang Chen
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
| | - Nan Zhou
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, People's Republic of China
| | - Xiaolei Yi
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, People's Republic of China
| | - Xiangzhuo Xing
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, People's Republic of China
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China
| | - Feng Ke
- Department of Geological Sciences, Stanford University, Stanford, California 94305, United States
| | - Zhenxian Liu
- Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Hongwei Sheng
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
| | - Zhixiang Shi
- School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, People's Republic of China
| | - Bin Chen
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
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Djieutedjeu H, Lopez JS, Lu R, Buchanan B, Zhou X, Chi H, Ranmohotti KGS, Uher C, Poudeu PFP. Charge Disproportionation Triggers Bipolar Doping in FeSb 2- xSn xSe 4 Ferromagnetic Semiconductors, Enabling a Temperature-Induced Lifshitz Transition. J Am Chem Soc 2019; 141:9249-9261. [PMID: 31074974 DOI: 10.1021/jacs.9b01884] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ferromagnetic semiconductors (FMSs) featuring a high Curie transition temperature ( Tc) and a strong correlation between itinerant carriers and localized magnetic moments are of tremendous importance for the development of practical spintronic devices. The realization of such materials hinges on the ability to generate and manipulate a high density of itinerant spin-polarized carriers and the understanding of their responses to external stimuli. In this study, we demonstrate the ability to tune magnetic ordering in the p-type FMS FeSb2- xSn xSe4 (0 ≤ x ≤ 0.20) through carrier density engineering. We found that the substitution of Sb by Sn FeSb2- xSn xSe4 increases the ordering of metal atoms within the selenium crystal lattice, leading to a large separation between magnetic centers. This results in a decrease in the Tc from 450 K for samples with x ≤ 0.05 to 325 K for samples with 0.05 < x ≤ 0.2. In addition, charge disproportionation arising from the substitution of Sb3+ by Sn2+ triggers the partial oxidation of Sb3+ to Sb5+, which is accompanied by the generation of both electrons and holes. This leads to a drastic decrease in the electrical resistivity and thermopower simultaneously with a large increase in the magnetic susceptibility and saturation magnetization upon increasing Sn content. The observed bipolar doping induces a very interesting temperature-induced quantum electronic transition (Lifshitz transition), which is manifested by the presence of an anomalous peak in the resistivity curve simultaneously with a reversal of the sign of a majority of the charge carriers from hole-like to electron-like at the temperature of maximum resistivity. This study suggests that while there is a strong correlation between the overall magnetic moment and free carrier spin in FeSb2- xSn xSe4 FMSs, the magnitude of the Curie temperature strongly depends on the spatial separation between localized magnetic centers rather than the concentration of magnetic atoms or the density of itinerant carriers.
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Affiliation(s)
| | | | | | | | | | | | - Kulugammana G S Ranmohotti
- Division of Science, Mathematics and Technology , Governors State University , University Park , Illinois 60484 , United States
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Abstract
An exact particle–hole transformation is discovered in a local-moment model for a single layer of heavily electron-doped FeSe. The model harbors hidden magnetic order between the iron d x z and d y z orbitals at the wavenumber ( π , π ) . It potentially is tied to the magnetic resonances about the very same Néel ordering vector that have been recently discovered in intercalated FeSe. Upon electron doping, the local-moment model successfully accounts for the electron-pocket Fermi surfaces observed experimentally at the corner of the two-iron Brillouin zone in electron-doped FeSe, as well as for isotropic Cooper pairs. Application of the particle–hole transformation predicts a surface-layer iron-based superconductor at strong hole doping that exhibits high T c, and that shows hole-type Fermi-surface pockets at the center of the two-iron Brillouin zone.
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Fermi surface and effective masses in photoemission response of the (Ba 1-x K x )Fe 2As 2 superconductor. Sci Rep 2017; 7:8787. [PMID: 28821871 PMCID: PMC5562888 DOI: 10.1038/s41598-017-09480-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 07/25/2017] [Indexed: 11/15/2022] Open
Abstract
The angle-resolved photoemission spectra of the superconductor (Ba1−xKx)Fe2As2 have been investigated accounting coherently for spin-orbit coupling, disorder and electron correlation effects in the valence bands combined with final state, matrix element and surface effects. Our results explain the previously obscured origins of all salient features of the ARPES response of this paradigm pnictide compound and reveal the origin of the Lifshitz transition. Comparison of calculated ARPES spectra with the underlying DMFT band structure shows an important impact of final state effects, which result for three-dimensional states in a deviation of the ARPES spectra from the true spectral function. In particular, the apparent effective mass enhancement seen in the ARPES response is not an entirely intrinsic property of the quasiparticle valence bands but may have a significant extrinsic contribution from the photoemission process and thus differ from its true value. Because this effect is more pronounced for low photoexcitation energies, soft-X-ray ARPES delivers more accurate values of the mass enhancement due to a sharp definition of the 3D electron momentum. To demonstrate this effect in addition to the theoretical study, we show here new state of the art soft-X-ray and polarisation dependent ARPES measurments.
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Ptok A, Kapcia KJ, Cichy A, Oleś AM, Piekarz P. Magnetic Lifshitz transition and its consequences in multi-band iron-based superconductors. Sci Rep 2017; 7:41979. [PMID: 28165043 PMCID: PMC5292748 DOI: 10.1038/srep41979] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 01/04/2017] [Indexed: 11/09/2022] Open
Abstract
In this paper we address Lifshitz transition induced by applied external magnetic field in a case of iron-based superconductors, in which a difference between the Fermi level and the edges of the bands is relatively small. We introduce and investigate a two-band model with intra-band pairing in the relevant parameters regime to address a generic behaviour of a system with hole-like and electron-like bands in external magnetic field. Our results show that two Lifshitz transitions can develop in analysed systems and the first one occurs in the superconducting phase and takes place at approximately constant magnetic field. The chosen sets of the model parameters can describe characteristic band structure of iron-based superconductors and thus the obtained results can explain the experimental observations in FeSe and Co-doped BaFe2As2 compounds.
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Affiliation(s)
- Andrzej Ptok
- Institute of Physics, Maria Curie-Skłodowska University, Plac M. Skłodowskiej-Curie 1, PL-20031 Lublin, Poland.,Institute of Nuclear Physics, Polish Academy of Sciences, ul. E. Radzikowskiego 152, PL-31342 Kraków, Poland
| | - Konrad J Kapcia
- Institute of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, PL-02668 Warsaw, Poland
| | - Agnieszka Cichy
- Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 9, D-55099 Mainz, Germany
| | - Andrzej M Oleś
- Marian Smoluchowski Institute of Physics, Jagiellonian University, ul. prof. S. Łojasiewicza 11, PL-30348 Kraków, Poland.,Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - Przemysław Piekarz
- Institute of Nuclear Physics, Polish Academy of Sciences, ul. E. Radzikowskiego 152, PL-31342 Kraków, Poland
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Rodriguez JP. Collective mode at Lifshitz transition in iron-pnictide superconductors. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:375701. [PMID: 27419913 DOI: 10.1088/0953-8984/28/37/375701] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We obtain the exact low-energy spectrum of two mobile holes in a t-J model for an isolated layer in an iron-pnictide superconductor. The minimum d xz and d yz orbitals per iron atom are included, with no hybridization between the two. After tuning the Hund coupling to a putative quantum critical point (QCP) that separates a commensurate spin-density wave from a hidden-order antiferromagnet at half filling, we find an s-wave hole-pair groundstate and a d-wave hole-pair excited state. Near the QCP, both alternate in sign between hole Fermi surface pockets at the Brillouin zone center and emergent electron Fermi surface pockets at momenta that correspond to commensurate spin-density waves (cSDW). The dependence of the energy splitting with increasing Hund coupling yields evidence for a true QCP in the thermodynamic limit near the putative one, at which the s-wave and d-wave Cooper pairs are degenerate. A collective s-to-d-wave oscillation of the macroscopic superconductor that couples to orthorhombic shear strain is also identified. Its resonant frequency is predicted to collapse to zero at the QCP in the limit of low hole concentration. This implies degeneracy of Cooper pairs with s, d and [Formula: see text] symmetry in the corresponding quantum critical state. We argue that the critical state describes Cooper pairs in hole-doped iron superconductors at the Lifshitz transition, where electron bands first rise above the Fermi level. We thereby predict that the s-to-d-wave collective mode observed by Raman spectroscopy in Ba1-x K x Fe2As2 at optimal doping should also be observed at higher doping near the Lifshitz transition.
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Affiliation(s)
- J P Rodriguez
- Department of Physics and Astronomy, California State University at Los Angeles, Los Angeles, CA 90032, USA
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Aoki D, Seyfarth G, Pourret A, Gourgout A, McCollam A, Bruin JAN, Krupko Y, Sheikin I. Field-Induced Lifshitz Transition without Metamagnetism in CeIrIn(5). PHYSICAL REVIEW LETTERS 2016; 116:037202. [PMID: 26849611 DOI: 10.1103/physrevlett.116.037202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Indexed: 06/05/2023]
Abstract
We report high magnetic field measurements of magnetic torque, thermoelectric power, magnetization, and the de Haas-van Alphen effect in CeIrIn_{5} across 28 T, where a metamagnetic transition was suggested in previous studies. The thermoelectric power displays two maxima at 28 and 32 T. Above 28 T, a new, low de Haas-van Alphen frequency with a strongly enhanced effective mass emerges, while the highest frequency observed at low field disappears entirely. This suggests a field-induced Lifshitz transition. However, longitudinal magnetization does not show any anomaly up to 33 T, thus ruling out a metamagnetic transition at 28 T.
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Affiliation(s)
- D Aoki
- Institute for Materials Research, Tohoku University, Oarai, Ibaraki 311-1313, Japan
- Université Grenoble Alpes, INAC-SPSMS, F-38000 Grenoble, France
- CEA, INAC-SPSMS, F-38000 Grenoble, France
| | - G Seyfarth
- Université Grenoble Alpes, LNCMI, 38042 Grenoble, France
- Laboratoire National des Champs Magnéetiques Intenses (LNCMI-EMFL), CNRS, UJF, 38042 Grenoble, France
| | - A Pourret
- Université Grenoble Alpes, INAC-SPSMS, F-38000 Grenoble, France
- CEA, INAC-SPSMS, F-38000 Grenoble, France
| | - A Gourgout
- Université Grenoble Alpes, INAC-SPSMS, F-38000 Grenoble, France
- CEA, INAC-SPSMS, F-38000 Grenoble, France
| | - A McCollam
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, 6525 ED Nijmegen, The Netherlands
| | - J A N Bruin
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, 6525 ED Nijmegen, The Netherlands
| | - Y Krupko
- Laboratoire National des Champs Magnéetiques Intenses (LNCMI-EMFL), CNRS, UJF, 38042 Grenoble, France
| | - I Sheikin
- Laboratoire National des Champs Magnéetiques Intenses (LNCMI-EMFL), CNRS, UJF, 38042 Grenoble, France
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Di Sante D, Barone P, Plekhanov E, Ciuchi S, Picozzi S. Robustness of Rashba and Dirac Fermions against Strong Disorder. Sci Rep 2015; 5:11285. [PMID: 26067146 PMCID: PMC4650895 DOI: 10.1038/srep11285] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Accepted: 04/30/2015] [Indexed: 11/13/2022] Open
Abstract
By addressing the interplay between substitutional disorder and spin-orbit-coupling in chalcogenide alloys, we predict a strong robustness of spectral features at the Fermi energy. Indeed, supplementing our state of the art first-principles calculations with modeling analysis, we show that the disorder self-energy is vanishingly small close to the band gap, thus i) allowing for bulk Rashba-like spin splitting to be observed in ferroelectric alloys by means of Angle Resolved PhotoEmission Spectroscopy, and ii) protecting the band-character inversion related to the topological transition in recently discovered Topological Crystalline Insulators. Such a protection against strong disorder, which we demonstrate to be general for three dimensional Dirac systems, has potential and valuable implications for novel technologies, as spintronics and/or spinorbitronics.
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Affiliation(s)
- Domenico Di Sante
- 1] Consiglio Nazionale delle Ricerche (CNR-SPIN), Via Vetoio, L'Aquila, Italy [2] Department of Physical and Chemical Sciences, University of L'Aquila, Via Vetoio 10, I-67010 L'Aquila, Italy
| | - Paolo Barone
- Consiglio Nazionale delle Ricerche (CNR-SPIN), Via Vetoio, L'Aquila, Italy
| | - Evgeny Plekhanov
- Consiglio Nazionale delle Ricerche (CNR-SPIN), Via Vetoio, L'Aquila, Italy
| | - Sergio Ciuchi
- 1] Department of Physical and Chemical Sciences, University of L'Aquila, Via Vetoio 10, I-67010 L'Aquila, Italy [2] Consiglio Nazionale delle Ricerche (CNR-ISC), Via dei Taurini, Rome, Italy
| | - Silvia Picozzi
- Consiglio Nazionale delle Ricerche (CNR-SPIN), Via Vetoio, L'Aquila, Italy
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Korotin MA, Pchelkina ZV, Skorikov NA, Anisimov VI, Shorikov AO. Investigation of electronic structure and magnetic properties of CaCo1.86As2 within the CPA method. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2015; 27:045502. [PMID: 25566766 DOI: 10.1088/0953-8984/27/4/045502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Recently in iron free arsenide compound CaCo(2)As(2) a 7(1)% of vacancies on the Co sites was detected (Quirinale D G et al 2013 Phys. Rev. B 88 174420). Here we report the investigation of electronic structure and magnetic properties of CaCo(1.86)As(2) within the coherent potential approximation (CPA). First, the CPA calculations are performed on the base of the local spin density approximation. Second, the possible role of Coulomb correlations is checked within the CPA scheme developed recently for strongly correlated systems. Then the spin-orbit coupling, which could be essential for Co, is also taken into account within the CPA calculation. The A type antiferromagnetic ground state and the value of magnetic moment obtained within the CPA approximation are in good agreement with experiment.
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Affiliation(s)
- M A Korotin
- M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, Ekaterinburg 620137, Russia
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