Abstract
We report the results of our in-depth analysis of spectroscopic and thermodynamic properties of a multiorbital metal, like FeSe, which first develops a nematic order and then undergoes a transition into a superconducting state, which coexists with nematicity. We analyze the angular dependence of the gap function and specific heat of such a nematic superconductor. We specifically address three issues: (i) the angular dependence of the gap in light of the competition between the nematicity-induced mixture and the orbital transmutation of low-energy excitations in the nematic state, (ii) the effect of nematicity on the magnitude of the jump of the specific heat at and the temperature dependence of below , and (iii) a potential transition at from an state to an state that breaks time-reversal symmetry. We consider two scenarios for a nematic order: scenario A, in which this order develops between and orbitals on hole and electron pockets, and scenario B, in which there is an additional component of the nematic order for fermions on the two electron pockets.
| Original language | English (US) |
|---|---|
| Article number | 094522 |
| Journal | Physical Review B |
| Volume | 104 |
| Issue number | 9 |
| DOIs | |
| State | Published - Sep 1 2021 |
Bibliographical note
Funding Information:U.S. Department of Energy National Natural Science Foundation of China Deutsche Forschungsgemeinschaft
Funding Information:
We thank Rafael Fernandes, Thierry Klein, and Hai-Hu Wen for useful conversations. The work by K.R.I. and A.V.C. was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, under Award No. DE-SC0014402. The work of J.B. and I.M.E. was supported by a joint NSFC-DFG grant (ER 463/14-1).
Publisher Copyright:
©2021 American Physical Society