Single Crystal Growth and Superconducting Properties of Antimony-Substituted NdO0.7F0.3BiS2

Abstract

Antimony (Sb) substitution of less than 8% was examined on a single crystal of a layered superconductor NdO 0.7 F 0.3 BiS 2 . The superconducting transition temperature of the substituted samples decreased as Sb concentration increased. A lattice constant along the c-axis showed a large decrease compared with that along the a-axis. Since in-plane chemical pressure monotonically decreased as Sb concentration increased, the suppression of the superconductivity is attributed to the decrease in the in-plane chemical pressure.

Layered Superconductors

“…In the paper by Mizuguchi, review of the discovery of the BiS 2 -based superconductor and material design concept is introduced [17]. In addition, original work on the single crystal growth and superconducting properties of antimony substituted NdO 0.7 F 0.3 BiS 2 is reported by Demura et al [18] Layered materials have been revisited due to the discovery of topological insulators and related superconductors. In this issue, magnetoresistance, gating and proximity effects in ultrathin NbN-Bi 2 Se 3 bilayers are reported [19].…”