Fe1+yTexSe1- x: A Delicate and Tunable Majorana Material

Yang, Fazhi; Phan, Giao Ngoc; Zhang, Renjie; Zhao, Jin; Li, Jiajun; Lu, Zouyouwei; Schneeloch, John; Zhong, Ruidan; Ma, Mingwei; Gu, Genda; Dong, Xiaoli; Qian, Tian; Ding, Hong

doi:10.1088/0256-307x/40/1/017401

Fe_1+yTe_xSe1-_x: A Delicate and Tunable Majorana Material

Journal Article · Mon Dec 12 00:00:00 EST 2022 · Chinese Physics Letters

DOI:https://doi.org/10.1088/0256-307x/40/1/017401· OSTI ID:1922728

Yang, Fazhi ^[1]; Phan, Giao Ngoc ^[1]; Zhang, Renjie ^[1]; Zhao, Jin ^[1]; Li, Jiajun ^[1]; Lu, Zouyouwei ^[1]; Schneeloch, John ^[2]; Zhong, Ruidan ^[3]; Ma, Mingwei ^[4]; ^[2]; Dong, Xiaoli ^[1]; Qian, Tian ^[4]; Ding, Hong ^[5]

Chinese Academy of Sciences (CAS), Beijing (China); University of Chinese Academy of Sciences, Beijing (China)
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Brookhaven National Laboratory (BNL), Upton, NY (United States); Shanghai Jiao Tong University (China)
Chinese Academy of Sciences (CAS), Beijing (China); Songshan Lake Materials Laboratory, Dongguan (China)
Chinese Academy of Sciences (CAS), Beijing (China); University of Chinese Academy of Sciences, Beijing (China); Shanghai Jiao Tong University (China)

Here, we report the observation for the p_z electron band and the band inversion in Fe_{1 + y}Te_xSe_1–xwith angle-resolved photoemission spectroscopy. Furthermore, we found that excess Fe (y > 0) inhibits the topological band inversion in Fe_{1 + y}Te_xSe_{1 – x}, which explains the absence of Majorana zero modes in previous reports for Fe_1+yTe_xSe_{1 – x} with excess Fe. Based on our analysis of different amounts of Te doping and excess Fe, we propose a delicate topological phase in this material. Thanks to this delicate phase, one may be able to tune the topological transition via applying lattice strain or carrier doping.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: Chinese Academy of Sciences; K. C. Wong Education Foundation; National Natural Science Foundation of China; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0010526; SC0012704

OSTI ID:: 1922728

Report Number(s):: BNL-223953-2023-JAAM

Journal Information:: Chinese Physics Letters, Journal Name: Chinese Physics Letters Journal Issue: 1 Vol. 40; ISSN 0256-307X

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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