Anomalous density of states in multiband superconductors near the Lifshitz transition

Koshelev, A. E.; Matveev, K. A.

doi:10.1103/PhysRevB.90.140505

Anomalous density of states in multiband superconductors near the Lifshitz transition

Journal Article · Wed Oct 01 04:00:00 EDT 2014 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.90.140505· OSTI ID:1396255

Koshelev, A. E.; Matveev, K. A.

We consider a multiband metal with deep primary bands and a shallow secondary one. In the normal state the system undergoes Lifshitz transition when the bottom of the shallow band crosses the Fermi level. In the superconducting state Cooper pairing in the shallow band is induced by the deep ones. As a result, the density of electrons in the shallow band remains finite even when the bottom of the band is above the Fermi level. We study the density of states in the system and find qualitatively different behaviors on the two sides of the Lifshitz transition. On one side of the transition the density of states diverges at the energy equal to the induced gap, whereas on the other side it vanishes. We argue that this physical picture describes the recently measured gap structurein shallow bands of iron pnictides and selenides.

Research Organization:: Argonne National Laboratory (ANL)

Sponsoring Organization:: USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1396255

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 14 Vol. 90; ISSN 1098-0121; ISSN PRBMDO

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

References (14)

Unconventional Anisotropic s -Wave Superconducting Gaps of the LiFeAs Iron-Pnictide Superconductor Umezawa, K.; Li, Y.; Miao, H. Physical Review Letters, Vol. 108, Issue 3 https://doi.org/10.1103/PhysRevLett.108.037002	journal	January 2012
Evidence for a Lifshitz transition in electron-doped iron arsenic superconductors at the onset of superconductivity Liu, Chang; Kondo, Takeshi; Fernandes, Rafael M. Nature Physics, Vol. 6, Issue 6 https://doi.org/10.1038/nphys1656	journal	May 2010
Importance of the Fermi-surface topology to the superconducting state of the electron-doped pnictide Ba(Fe 1 − x Co x ) 2 As 2 Liu, Chang; Palczewski, A. D.; Dhaka, R. S. Physical Review B, Vol. 84, Issue 2 https://doi.org/10.1103/PhysRevB.84.020509	journal	July 2011
Theory of ultracold atomic Fermi gases Giorgini, Stefano; Pitaevskii, Lev P.; Stringari, Sandro Reviews of Modern Physics, Vol. 80, Issue 4 https://doi.org/10.1103/RevModPhys.80.1215	journal	October 2008
Gap symmetry and structure of Fe-based superconductors Hirschfeld, P. J.; Korshunov, M. M.; Mazin, I. I. Reports on Progress in Physics, Vol. 74, Issue 12 https://doi.org/10.1088/0034-4885/74/12/124508	journal	October 2011
Resonant and crossover phenomena in a multiband superconductor: Tuning the chemical potential near a band edge Innocenti, Davide; Poccia, Nicola; Ricci, Alessandro Physical Review B, Vol. 82, Issue 18 https://doi.org/10.1103/PhysRevB.82.184528	journal	November 2010
High-temperature superconductivity in iron-based materials Paglione, Johnpierre; Greene, Richard L. Nature Physics, Vol. 6, Issue 9 https://doi.org/10.1038/nphys1759	journal	August 2010
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides Johnston, David C. Advances in Physics, Vol. 59, Issue 6 https://doi.org/10.1080/00018732.2010.513480	journal	October 2010
Pairing Mechanism in Fe-Based Superconductors Chubukov, Andrey Annual Review of Condensed Matter Physics, Vol. 3, Issue 1 https://doi.org/10.1146/annurev-conmatphys-020911-125055	journal	March 2012
Superconductivity in an electron band just above the Fermi level: possible route to BCS-BEC superconductivity Okazaki, K.; Ito, Y.; Ota, Y. Scientific Reports, Vol. 4, Issue 1 https://doi.org/10.1038/srep04109	journal	February 2014
Bardeen-Cooper-Schrieffer Theory of Superconductivity in the Case of Overlapping Bands Suhl, H.; Matthias, B. T.; Walker, L. R. Physical Review Letters, Vol. 3, Issue 12 https://doi.org/10.1103/PhysRevLett.3.552	journal	December 1959
The theory of electronic topological transitions Blanter, Ya. M.; Kaganov, M. I.; Pantsulaya, A. V. Physics Reports, Vol. 245, Issue 4 https://doi.org/10.1016/0370-1573(94)90103-1	journal	September 1994
Iron-Based Layered Superconductor La[O _1- _x F _x ]FeAs ( x = 0.05−0.12) with T _c = 26 K Kamihara, Yoichi; Watanabe, Takumi; Hirano, Masahiro Journal of the American Chemical Society, Vol. 130, Issue 11 https://doi.org/10.1021/ja800073m	journal	March 2008
Shallow pockets and very strong coupling superconductivity in FeSexTe1−x Lubashevsky, Y.; Lahoud, E.; Chashka, K. Nature Physics, Vol. 8, Issue 4 https://doi.org/10.1038/nphys2216	journal	February 2012

Similar Records

Tunable Lifshitz Transitions and Multiband Transport in Tetralayer Graphene

Journal Article · Tue Feb 27 19:00:00 EST 2018 · Physical Review Letters · OSTI ID:1470263

Anomalous Hall effect at the Lifshitz transition in ZrTe₅

Journal Article · Sun Aug 28 20:00:00 EDT 2022 · Physical Review. B · OSTI ID:1897502

s± pairing near a Lifshitz transition

Journal Article · Thu Aug 25 20:00:00 EDT 2016 · Scientific Reports · OSTI ID:1311242

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY

Anomalous density of states in multiband superconductors near the Lifshitz transition

Citation Formats

References (14)

Similar Records

Related Subjects