FeTe1−xSex monolayer films: towards the realization of high-temperature connate topological superconductivity

Xun Shi; Zhi Qing Han; Pierre Richard; Xian Xin Wu; Xi Liang Peng; Tian Qian; Shan Cai Wang; Jiang Ping Hu; Yu Jie Sun; Hong Ding

doi:10.1016/j.scib.2017.03.010

FeTe₁₋_xSe_x monolayer films: towards the realization of high-temperature connate topological superconductivity

Xun Shi, Zhi Qing Han, Pierre Richard, Xian Xin Wu, Xi Liang Peng, Tian Qian, Shan Cai Wang, Jiang Ping Hu, Yu Jie Sun^*, Hong Ding

^*Corresponding author for this work

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

67 Citations (Scopus)

Abstract

We performed angle-resolved photoemission spectroscopy studies on a series of FeTe₁₋_xSe_x monolayer films grown on SrTiO₃. The superconductivity of the films is robust and rather insensitive to the variations of the band position and effective mass caused by the substitution of Se by Te. However, the band gap between the electron- and hole-like bands at the Brillouin zone center decreases towards band inversion and parity exchange, which drive the system to a nontrivial topological state predicted by theoretical calculations. Our results provide a clear experimental indication that the FeTe₁₋_xSe_x monolayer materials are high-temperature connate topological superconductors in which band topology and superconductivity are integrated intrinsically.

Original language	English
Pages (from-to)	503-507
Number of pages	5
Journal	Science Bulletin
Volume	62
Issue number	7
DOIs	https://doi.org/10.1016/j.scib.2017.03.010
Publication status	Published - 2017
Externally published	Yes

Keywords

Iron-based superconductors
Thin film
Topological superconductivity

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10.1016/j.scib.2017.03.010

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title = "FeTe1−xSex monolayer films: towards the realization of high-temperature connate topological superconductivity",

abstract = "We performed angle-resolved photoemission spectroscopy studies on a series of FeTe1−xSex monolayer films grown on SrTiO3. The superconductivity of the films is robust and rather insensitive to the variations of the band position and effective mass caused by the substitution of Se by Te. However, the band gap between the electron- and hole-like bands at the Brillouin zone center decreases towards band inversion and parity exchange, which drive the system to a nontrivial topological state predicted by theoretical calculations. Our results provide a clear experimental indication that the FeTe1−xSex monolayer materials are high-temperature connate topological superconductors in which band topology and superconductivity are integrated intrinsically.",

keywords = "Iron-based superconductors, Thin film, Topological superconductivity",

author = "Xun Shi and Han, {Zhi Qing} and Pierre Richard and Wu, {Xian Xin} and Peng, {Xi Liang} and Tian Qian and Wang, {Shan Cai} and Hu, {Jiang Ping} and Sun, {Yu Jie} and Hong Ding",

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year = "2017",

doi = "10.1016/j.scib.2017.03.010",

language = "English",

volume = "62",

pages = "503--507",

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TY - JOUR

T1 - FeTe1−xSex monolayer films

T2 - towards the realization of high-temperature connate topological superconductivity

AU - Shi, Xun

AU - Han, Zhi Qing

AU - Richard, Pierre

AU - Wu, Xian Xin

AU - Peng, Xi Liang

AU - Qian, Tian

AU - Wang, Shan Cai

AU - Hu, Jiang Ping

AU - Sun, Yu Jie

AU - Ding, Hong

PY - 2017

Y1 - 2017

N2 - We performed angle-resolved photoemission spectroscopy studies on a series of FeTe1−xSex monolayer films grown on SrTiO3. The superconductivity of the films is robust and rather insensitive to the variations of the band position and effective mass caused by the substitution of Se by Te. However, the band gap between the electron- and hole-like bands at the Brillouin zone center decreases towards band inversion and parity exchange, which drive the system to a nontrivial topological state predicted by theoretical calculations. Our results provide a clear experimental indication that the FeTe1−xSex monolayer materials are high-temperature connate topological superconductors in which band topology and superconductivity are integrated intrinsically.

AB - We performed angle-resolved photoemission spectroscopy studies on a series of FeTe1−xSex monolayer films grown on SrTiO3. The superconductivity of the films is robust and rather insensitive to the variations of the band position and effective mass caused by the substitution of Se by Te. However, the band gap between the electron- and hole-like bands at the Brillouin zone center decreases towards band inversion and parity exchange, which drive the system to a nontrivial topological state predicted by theoretical calculations. Our results provide a clear experimental indication that the FeTe1−xSex monolayer materials are high-temperature connate topological superconductors in which band topology and superconductivity are integrated intrinsically.

KW - Iron-based superconductors

KW - Thin film

KW - Topological superconductivity

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DO - 10.1016/j.scib.2017.03.010

M3 - Article

AN - SCOPUS:85019198926

SN - 2095-9273

VL - 62

SP - 503

EP - 507

JO - Science Bulletin

JF - Science Bulletin

IS - 7

ER -

FeTe₁₋_xSe_x monolayer films: towards the realization of high-temperature connate topological superconductivity

Abstract

Keywords

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