[10p-N303-1~9] 10.4 Spintronics in semiconductor, topological material, superconductor, and multiferroics

1:30 PM - 1:45 PM JST(4:30 AM - 4:45 AM UTC)English Presentation

[10p-N303-1] Detection of spin polarization in superconducting FeTe_0.6Se_0.4 via potentiometric method

〇Ryo Ohshima¹, Kosuke Ohnishi¹, Taiki Nishijima¹, Shinya Kawabata¹, Sigeru Kasahara^2,3, Yuichi Kasahara³, Yuichiro Ando^1,4, Youichi Yanase³, Yuji Matsuda³, Masashi Shiraishi¹ (1.Dept. of Eng., Kyoto Univ., 2.RIIS, Okayama Univ., 3.Dept. of Phys., Kyoto Univ., 4.PRESTO-JST)

Keywords:

superconductor,spin polarization

FeTeSe has been collecting much attention as one of the possible candidates of topological p-wave superconductors, hosting Majorana quasiparticles. In fact, recent studies using scanning tunnelling microscopy have revealed that the zero-energy state can appear in vortex cores in FeTeSe by applying a perpendicular external magnetic field. Spontaneous time-reversal symmetry breaking in FeTeSe has been also reported and indicated a possible spin polarized state at the surface of FeTeSe as a nature of effective topological p-wave superconducting state. On the other hand, the experimental technique to access the topological p-wave state is still limited. Here, we demonstrate electrical detection of spin polarization in superconducting FeTe_0.6Se_0.4 via potentiometric method.