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Evolution of the Superconducting State of Fe-Based Compounds with Doping

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [4];  [1]
  1. University of Wisconsin, Madison, WI (United States)
  2. University of Florida, Gainesville, FL (United States); Siberian Branch of Russian Academy of Sciences, Krasnoyarsk (Russia)
  3. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  4. University of Florida, Gainesville, FL (United States)
+ Show Author Affiliations
We introduce an effective low-energy pairing model for Fe-based superconductors with s- and d-wave interaction components and a small number of input parameters and use it to study the doping evolution of the symmetry and the structure of the superconducting gap. Here, we argue that the model describes the entire variety of pairing states found so far in the Fe-based superconductors and allows one to understand the mechanism of the attraction in s± and dx2–y2 channels, the competition between s- and d-wave solutions, and the origin of superconductivity in heavily doped systems, when only electron or only hole pockets are present.
Research Organization:
University of Florida, Gainesville, FL (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-05ER46236
OSTI ID:
2484135
Alternate ID(s):
OSTI ID: 1100839
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 14 Vol. 107; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY