Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session L14: Fe-based Superconductors -- Theory
11:15 AM–2:15 PM,
Wednesday, March 7, 2018
LACC Room: 304B
Sponsoring Unit: DMP
Chair: Wei Ku, Shanghai Jiao Tong Univ
Abstract: L14.00008 : Orbital-Selective Pairing and Nematic Order in the Iron-Based Superconductors*
1:03 PM–1:15 PM
(The University of British Columbia)
(Renmin University of China)
The considerations of the orbital-selective Mott phase in the normal state [1,2] motivated the theoretical proposal for orbital-selective pairing . The experimental evidence for the latter has come from both the iron pnictides  and iron selenides . Motivated by the recent experiments, we theoretically study the role of the nematic order in the orbital-selective pairing within multi-orbital models for superconductivity driven by short-range magnetic exchange interactions. We consider several ways that characterize the nematicity in the Hamiltonian, and present systematic results on how the pairing-state competition , the orbital dependency of the intra-orbital pairing amplitudes, the pairing symmetry and the gap anisotropy depend on the nematicity.
 R. Yu and Q. Si, PRL 110, 146402 (2013); PRB 84, 235115 (2011).
 M. Yi et al., PRL 110, 067003 (2013).
 R. Yu, J.-X. Zhu and Q. Si, PRB 89, 024509 (2014).
 C. Zhang et al., Phys. Rev. Lett. 111, 207002 (2013).
 P. O. Sprau et al., Science 357, 75 (2017).
 E. M. Nica, R. Yu and Q. Si, Npj Quantum Materials 2, 24 (2017).
*DOE BES Award # DE-SC0018197.
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