Tunable spin helical Dirac quasiparticles on the surface of three-dimensional HgTe

Chang Liu; Guang Bian; Tay Rong Chang; Kedong Wang; Su Yang Xu; Ilya Belopolski; Irek Miotkowski; Helin Cao; Koji Miyamoto; Chaoqiang Xu; Christian E. Matt; Thorsten Schmitt; Nasser Alidoust; Madhab Neupane; Horng Tay Jeng; Hsin Lin; Arun Bansil; Vladimir N. Strocov; Mark Bissen; Alexei V. Fedorov; Xudong Xiao; Taichi Okuda; Yong P. Chen; M. Zahid Hasan

doi:10.1103/PhysRevB.92.115436

Tunable spin helical Dirac quasiparticles on the surface of three-dimensional HgTe

Chang Liu
, Guang Bian
, Tay Rong Chang
, Kedong Wang
, Su Yang Xu
, Ilya Belopolski
, Irek Miotkowski
, Helin Cao
, Koji Miyamoto
, Chaoqiang Xu
, Christian E. Matt
, Thorsten Schmitt
, Nasser Alidoust
, Madhab Neupane
, Horng Tay Jeng
, Hsin Lin
, Arun Bansil
, Vladimir N. Strocov
, Mark Bissen
, Alexei V. Fedorov

Xudong Xiao, Taichi Okuda, Yong P. Chen, M. Zahid Hasan

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

25 Scopus citations

Abstract

We show with systematic photoemission spectroscopy and scanning tunneling spectroscopy data that a spin helical surface state appears on the (110) surface of noncentrosymmetric, three-dimensional HgTe. The topological surface state in HgTe exhibits sharp, linear dispersion without kz variation, as well as clear, left-right imbalanced spin polarization and circular dichroism. Chemical gating by alkali metal deposition on the surface causes the unexpected opening and/or increase of a surface insulating gap without changing its topological property. Such an unusual behavior we uncover in three-dimensional HgTe sheds light on a convenient control of the Fermi surface and quantum transport in a topological insulator.

Original language	English (US)
Article number	115436
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	92
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevB.92.115436
State	Published - Sep 22 2015

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.92.115436

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Liu, C., Bian, G., Chang, T. R., Wang, K., Xu, S. Y., Belopolski, I., Miotkowski, I., Cao, H., Miyamoto, K., Xu, C., Matt, C. E., Schmitt, T., Alidoust, N., Neupane, M., Jeng, H. T., Lin, H., Bansil, A., Strocov, V. N., Bissen, M., ... Hasan, M. Z. (2015). Tunable spin helical Dirac quasiparticles on the surface of three-dimensional HgTe. Physical Review B - Condensed Matter and Materials Physics, 92(11), Article 115436. https://doi.org/10.1103/PhysRevB.92.115436

@article{3d5075680e6e4cfea518750c6135e255,

title = "Tunable spin helical Dirac quasiparticles on the surface of three-dimensional HgTe",

abstract = "We show with systematic photoemission spectroscopy and scanning tunneling spectroscopy data that a spin helical surface state appears on the (110) surface of noncentrosymmetric, three-dimensional HgTe. The topological surface state in HgTe exhibits sharp, linear dispersion without kz variation, as well as clear, left-right imbalanced spin polarization and circular dichroism. Chemical gating by alkali metal deposition on the surface causes the unexpected opening and/or increase of a surface insulating gap without changing its topological property. Such an unusual behavior we uncover in three-dimensional HgTe sheds light on a convenient control of the Fermi surface and quantum transport in a topological insulator.",

author = "Chang Liu and Guang Bian and Chang, \{Tay Rong\} and Kedong Wang and Xu, \{Su Yang\} and Ilya Belopolski and Irek Miotkowski and Helin Cao and Koji Miyamoto and Chaoqiang Xu and Matt, \{Christian E.\} and Thorsten Schmitt and Nasser Alidoust and Madhab Neupane and Jeng, \{Horng Tay\} and Hsin Lin and Arun Bansil and Strocov, \{Vladimir N.\} and Mark Bissen and Fedorov, \{Alexei V.\} and Xudong Xiao and Taichi Okuda and Chen, \{Yong P.\} and Hasan, \{M. Zahid\}",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = sep,

day = "22",

doi = "10.1103/PhysRevB.92.115436",

language = "English (US)",

volume = "92",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "11",

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Liu, C, Bian, G, Chang, TR, Wang, K, Xu, SY, Belopolski, I, Miotkowski, I, Cao, H, Miyamoto, K, Xu, C, Matt, CE, Schmitt, T, Alidoust, N, Neupane, M, Jeng, HT, Lin, H, Bansil, A, Strocov, VN, Bissen, M, Fedorov, AV, Xiao, X, Okuda, T, Chen, YP & Hasan, MZ 2015, 'Tunable spin helical Dirac quasiparticles on the surface of three-dimensional HgTe', Physical Review B - Condensed Matter and Materials Physics, vol. 92, no. 11, 115436. https://doi.org/10.1103/PhysRevB.92.115436

TY - JOUR

T1 - Tunable spin helical Dirac quasiparticles on the surface of three-dimensional HgTe

AU - Liu, Chang

AU - Bian, Guang

AU - Chang, Tay Rong

AU - Wang, Kedong

AU - Xu, Su Yang

AU - Belopolski, Ilya

AU - Miotkowski, Irek

AU - Cao, Helin

AU - Miyamoto, Koji

AU - Xu, Chaoqiang

AU - Matt, Christian E.

AU - Schmitt, Thorsten

AU - Alidoust, Nasser

AU - Neupane, Madhab

AU - Jeng, Horng Tay

AU - Lin, Hsin

AU - Bansil, Arun

AU - Strocov, Vladimir N.

AU - Bissen, Mark

AU - Fedorov, Alexei V.

AU - Xiao, Xudong

AU - Okuda, Taichi

AU - Chen, Yong P.

AU - Hasan, M. Zahid

PY - 2015/9/22

Y1 - 2015/9/22

N2 - We show with systematic photoemission spectroscopy and scanning tunneling spectroscopy data that a spin helical surface state appears on the (110) surface of noncentrosymmetric, three-dimensional HgTe. The topological surface state in HgTe exhibits sharp, linear dispersion without kz variation, as well as clear, left-right imbalanced spin polarization and circular dichroism. Chemical gating by alkali metal deposition on the surface causes the unexpected opening and/or increase of a surface insulating gap without changing its topological property. Such an unusual behavior we uncover in three-dimensional HgTe sheds light on a convenient control of the Fermi surface and quantum transport in a topological insulator.

AB - We show with systematic photoemission spectroscopy and scanning tunneling spectroscopy data that a spin helical surface state appears on the (110) surface of noncentrosymmetric, three-dimensional HgTe. The topological surface state in HgTe exhibits sharp, linear dispersion without kz variation, as well as clear, left-right imbalanced spin polarization and circular dichroism. Chemical gating by alkali metal deposition on the surface causes the unexpected opening and/or increase of a surface insulating gap without changing its topological property. Such an unusual behavior we uncover in three-dimensional HgTe sheds light on a convenient control of the Fermi surface and quantum transport in a topological insulator.

UR - https://www.scopus.com/pages/publications/84942456182

UR - https://www.scopus.com/pages/publications/84942456182#tab=citedBy

U2 - 10.1103/PhysRevB.92.115436

DO - 10.1103/PhysRevB.92.115436

M3 - Article

AN - SCOPUS:84942456182

SN - 1098-0121

VL - 92

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 11

M1 - 115436

ER -

Tunable spin helical Dirac quasiparticles on the surface of three-dimensional HgTe

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