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

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

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

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

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

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We report the observation for the p_z electron band and the band inversion in Fe_{1 + y}Te_xSe_1-x with 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.

Original language	English
Article number	017401
Journal	Chinese Physics Letters
Volume	40
Issue number	1
DOIs	https://doi.org/10.1088/0256-307X/40/1/017401
State	Published - Jan 1 2023
Externally published	Yes

Funding

We thank Zhijun Wang, Lingyuan Kong, and Wenyao Liu for helpful discussions. This work was performed at Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China. This work was supported by the National Natural Science Foundation of China (Grant Nos. 11888101 and U1832202), the Chinese Academy of Sciences (Grant Nos. QYZDB-SSW-SLH043, XDB28000000, and XDB33000000), the K. C. Wong Education Foundation (Grant No. GJTD-2018-01), and the Informatization Plan of Chinese Academy of Sciences (Grant No. CAS-WX2021SF-0102). This work was also supported by the Synergetic Extreme Condition User Facility (SECUF). G.D.G. was supported by US DOE (Grant Nos. DE-SC0010526 and DE-SC0012704).

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10.1088/0256-307X/40/1/017401

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title = "Fe1+yTexSe1-x : A Delicate and Tunable Majorana Material",

abstract = "We report the observation for the pz electron band and the band inversion in Fe1 + yTexSe1-x with angle-resolved photoemission spectroscopy. Furthermore, we found that excess Fe (y > 0) inhibits the topological band inversion in Fe1 + yTexSe1 - x , which explains the absence of Majorana zero modes in previous reports for Fe1+yTexSe1 - 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.",

author = "Fazhi Yang and Phan, \{Giao Ngoc\} and Renjie Zhang and Jin Zhao and Jiajun Li and Zouyouwei Lu and John Schneeloch and Ruidan Zhong and Mingwei Ma and Genda Gu and Xiaoli Dong and Tian Qian and Hong Ding",

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T2 - A Delicate and Tunable Majorana Material

AU - Yang, Fazhi

AU - Phan, Giao Ngoc

AU - Zhang, Renjie

AU - Zhao, Jin

AU - Li, Jiajun

AU - Lu, Zouyouwei

AU - Schneeloch, John

AU - Zhong, Ruidan

AU - Ma, Mingwei

AU - Gu, Genda

AU - Dong, Xiaoli

AU - Qian, Tian

AU - Ding, Hong

PY - 2023/1/1

Y1 - 2023/1/1

N2 - We report the observation for the pz electron band and the band inversion in Fe1 + yTexSe1-x with angle-resolved photoemission spectroscopy. Furthermore, we found that excess Fe (y > 0) inhibits the topological band inversion in Fe1 + yTexSe1 - x , which explains the absence of Majorana zero modes in previous reports for Fe1+yTexSe1 - 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.

AB - We report the observation for the pz electron band and the band inversion in Fe1 + yTexSe1-x with angle-resolved photoemission spectroscopy. Furthermore, we found that excess Fe (y > 0) inhibits the topological band inversion in Fe1 + yTexSe1 - x , which explains the absence of Majorana zero modes in previous reports for Fe1+yTexSe1 - 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.

UR - https://www.scopus.com/pages/publications/85146063625

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DO - 10.1088/0256-307X/40/1/017401

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VL - 40

JO - Chinese Physics Letters

JF - Chinese Physics Letters

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ER -

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

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