Quasiparticle Excitations in the Superconducting State of FeSe Probed by Thermal Hall Conductivity in the Vicinity of the BCS-BEC Crossover

Tatsuya Watashige, Stevan Arsenijević, Takuya Yamashita +10

There is growing evidence that the superconducting semimetal FeSe ($T_c\sim 8$ K) is in the crossover regime between weak-coupling Bardeen-Cooper-Schrieffer (BCS) and strong-couplin…