Surface State Bands in Superconducting (PtxIr1-x)Te2

Wan Dong Kong; Hu Miao; Tian Qian; Zhi Jun Wang; Gang Xu; Ai Fang Fang; Yao Bo Huang; Peng Zhang; Xun Shi; Zhong Fang; Xi Dai; Pierre Richard; Nan Lin Wang; Hong Ding

doi:10.1088/0256-307X/32/7/077402

Surface State Bands in Superconducting (Pt_xIr_1-x)Te₂

Wan Dong Kong, Hu Miao, Tian Qian, Zhi Jun Wang, Gang Xu, Ai Fang Fang, Yao Bo Huang, Peng Zhang, Xun Shi, Zhong Fang, Xi Dai, Pierre Richard, Nan Lin Wang, Hong Ding

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2 Scopus citations

Abstract

Angle-resolved photoemission spectroscopy is performed to study the bulk and surface electronic structures of nonsuperconducting IrTe₂ and superconducting Pt_0.05Ir_0.95Te₂. In addition to the bulk electronic bands predicted by the local density approximation calculations, we observe two Dirac cone-like bands at the Brillouin zone center, which are non-dispersive along k_z, suggesting that the extra bands are surface state bands. As the experimental results are well consistent with the ab initio calculations of surface states, the parity analysis proves that these surface state bands are topologically trivial and thus exclude (Pt_xIr_1-x)Te₂ as a possible topological superconductor candidate.

Original language	English
Article number	077402
Journal	Chinese Physics Letters
Volume	32
Issue number	7
DOIs	https://doi.org/10.1088/0256-307X/32/7/077402
State	Published - Jul 1 2015
Externally published	Yes

Funding

Funders	Funder number
Chinese Academy of Sciences	XDB07000000
National Natural Science Foundation of China	11121063, 11204359

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10.1088/0256-307X/32/7/077402

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title = "Surface State Bands in Superconducting (PtxIr1-x)Te2",

abstract = "Angle-resolved photoemission spectroscopy is performed to study the bulk and surface electronic structures of nonsuperconducting IrTe2 and superconducting Pt0.05Ir0.95Te2. In addition to the bulk electronic bands predicted by the local density approximation calculations, we observe two Dirac cone-like bands at the Brillouin zone center, which are non-dispersive along kz, suggesting that the extra bands are surface state bands. As the experimental results are well consistent with the ab initio calculations of surface states, the parity analysis proves that these surface state bands are topologically trivial and thus exclude (PtxIr1-x)Te2 as a possible topological superconductor candidate.",

author = "Kong, {Wan Dong} and Hu Miao and Tian Qian and Wang, {Zhi Jun} and Gang Xu and Fang, {Ai Fang} and Huang, {Yao Bo} and Peng Zhang and Xun Shi and Zhong Fang and Xi Dai and Pierre Richard and Wang, {Nan Lin} and Hong Ding",

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doi = "10.1088/0256-307X/32/7/077402",

language = "English",

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TY - JOUR

T1 - Surface State Bands in Superconducting (PtxIr1-x)Te2

AU - Kong, Wan Dong

AU - Miao, Hu

AU - Qian, Tian

AU - Wang, Zhi Jun

AU - Xu, Gang

AU - Fang, Ai Fang

AU - Huang, Yao Bo

AU - Zhang, Peng

AU - Shi, Xun

AU - Fang, Zhong

AU - Dai, Xi

AU - Richard, Pierre

AU - Wang, Nan Lin

AU - Ding, Hong

PY - 2015/7/1

Y1 - 2015/7/1

N2 - Angle-resolved photoemission spectroscopy is performed to study the bulk and surface electronic structures of nonsuperconducting IrTe2 and superconducting Pt0.05Ir0.95Te2. In addition to the bulk electronic bands predicted by the local density approximation calculations, we observe two Dirac cone-like bands at the Brillouin zone center, which are non-dispersive along kz, suggesting that the extra bands are surface state bands. As the experimental results are well consistent with the ab initio calculations of surface states, the parity analysis proves that these surface state bands are topologically trivial and thus exclude (PtxIr1-x)Te2 as a possible topological superconductor candidate.

AB - Angle-resolved photoemission spectroscopy is performed to study the bulk and surface electronic structures of nonsuperconducting IrTe2 and superconducting Pt0.05Ir0.95Te2. In addition to the bulk electronic bands predicted by the local density approximation calculations, we observe two Dirac cone-like bands at the Brillouin zone center, which are non-dispersive along kz, suggesting that the extra bands are surface state bands. As the experimental results are well consistent with the ab initio calculations of surface states, the parity analysis proves that these surface state bands are topologically trivial and thus exclude (PtxIr1-x)Te2 as a possible topological superconductor candidate.

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U2 - 10.1088/0256-307X/32/7/077402

DO - 10.1088/0256-307X/32/7/077402

M3 - Article

AN - SCOPUS:84935452114

SN - 0256-307X

VL - 32

JO - Chinese Physics Letters

JF - Chinese Physics Letters

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ER -

Surface State Bands in Superconducting (Pt_xIr_1-x)Te₂

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