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Title: s± pairing near a Lifshitz transition

Observations of robust superconductivity in some of the iron based superconductors in the vicinity of a Lifshitz point where a spin density wave instability is suppressed as the hole band drops below the Fermi energy raise questions for spin-fluctuation theories. In this paper we discuss spin-fluctuation pairing for a bilayer Hubbard model, which goes through such a Lifshitz transition. Our results show s± pairing with a transition temperature that peaks beyond the Lifshitz point and a gap function that has essentially the same magnitude but opposite sign on the incipient hole band as it does on the electron band that has a Fermi surface.
Authors:
 [1] ;  [2] ;  [3]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of California, Santa Barbara, CA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Joint Institute for Computational Sciences (JICS)
Sponsoring Org:
USDOE Office of Science (SC); USDOE Laboratory Directed Research and Development (LDRD) Program
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1311242

Mishra, Vivek, Scalapino, Douglas J., and Maier, Thomas A.. s± pairing near a Lifshitz transition. United States: N. p., Web. doi:10.1038/srep32078.
Mishra, Vivek, Scalapino, Douglas J., & Maier, Thomas A.. s± pairing near a Lifshitz transition. United States. doi:10.1038/srep32078.
Mishra, Vivek, Scalapino, Douglas J., and Maier, Thomas A.. 2016. "s± pairing near a Lifshitz transition". United States. doi:10.1038/srep32078. https://www.osti.gov/servlets/purl/1311242.
@article{osti_1311242,
title = {s± pairing near a Lifshitz transition},
author = {Mishra, Vivek and Scalapino, Douglas J. and Maier, Thomas A.},
abstractNote = {Observations of robust superconductivity in some of the iron based superconductors in the vicinity of a Lifshitz point where a spin density wave instability is suppressed as the hole band drops below the Fermi energy raise questions for spin-fluctuation theories. In this paper we discuss spin-fluctuation pairing for a bilayer Hubbard model, which goes through such a Lifshitz transition. Our results show s± pairing with a transition temperature that peaks beyond the Lifshitz point and a gap function that has essentially the same magnitude but opposite sign on the incipient hole band as it does on the electron band that has a Fermi surface.},
doi = {10.1038/srep32078},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = {2016},
month = {8}
}