Dual topological states in the layered titanium-based oxypnictide superconductor BaTi2Sb2O

Z. Huang; W. L. Liu; H. Y. Wang; Y. L. Su; Z. T. Liu; X. B. Shi; S. Y. Gao; Z. Y. Chen; Y. J. Yan; Z. C. Jiang; Z. H. Liu; J. S. Liu; X. L. Lu; Y. C. Yang; R. X. Zhou; W. Xia; Y. B. Huang; S. Qiao; W. W. Zhao; Y. F. Guo; G. Li; D. W. Shen

doi:10.1038/s41535-022-00477-z

Dual topological states in the layered titanium-based oxypnictide superconductor BaTi₂Sb₂O

Z. Huang
, W. L. Liu
, H. Y. Wang
, Y. L. Su
, Z. T. Liu
, X. B. Shi
, S. Y. Gao
, Z. Y. Chen
, Y. J. Yan
, Z. C. Jiang
, Z. H. Liu
, J. S. Liu
, X. L. Lu
, Y. C. Yang
, R. X. Zhou
, W. Xia
, Y. B. Huang
, S. Qiao
, W. W. Zhao
, Y. F. Guo^*

G. Li^*, D. W. Shen^*

^*Corresponding author for this work

CAS - Shanghai Institute of Microsystem and Information Technology
University of Chinese Academy of Sciences
ShanghaiTech University
Harbin Institute of Technology Shenzhen
CAS - Institute of Physics
University of Science and Technology of China
Tsinghua University
CAS - Shanghai Advanced Research Institute

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

10 Scopus citations

Abstract

Topological superconductors have long been predicted to host Majorana zero modes which obey non-Abelian statistics and have potential for realizing non-decoherence topological quantum computation. However, material realization of topological superconductors is still a challenge in condensed matter physics. Utilizing high-resolution angle-resolved photoemission spectroscopy and first-principles calculations, we predict and then unveil the coexistence of topological Dirac semimetal and topological insulator states in the vicinity of Fermi energy (E_F) in the titanium-based oxypnictide superconductor BaTi₂Sb₂O. Further spin-resolved measurements confirm its spin-helical surface states around E_F, which are topologically protected and give an opportunity for realization of Majorana zero modes and Majorana flat bands in one material. Hosting dual topological states, the intrinsic superconductor BaTi₂Sb₂O is expected to be a promising platform for further investigation of topological superconductivity.

Original language	English
Article number	70
Journal	npj Quantum Materials
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/s41535-022-00477-z
State	Published - Dec 2022
Externally published	Yes

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Huang, Z., Liu, W. L., Wang, H. Y., Su, Y. L., Liu, Z. T., Shi, X. B., Gao, S. Y., Chen, Z. Y., Yan, Y. J., Jiang, Z. C., Liu, Z. H., Liu, J. S., Lu, X. L., Yang, Y. C., Zhou, R. X., Xia, W., Huang, Y. B., Qiao, S., Zhao, W. W., ... Shen, D. W. (2022). Dual topological states in the layered titanium-based oxypnictide superconductor BaTi₂Sb₂O. npj Quantum Materials, 7(1), Article 70. https://doi.org/10.1038/s41535-022-00477-z

@article{0e25b409135a4da89e9ff629454a6cfc,

title = "Dual topological states in the layered titanium-based oxypnictide superconductor BaTi2Sb2O",

abstract = "Topological superconductors have long been predicted to host Majorana zero modes which obey non-Abelian statistics and have potential for realizing non-decoherence topological quantum computation. However, material realization of topological superconductors is still a challenge in condensed matter physics. Utilizing high-resolution angle-resolved photoemission spectroscopy and first-principles calculations, we predict and then unveil the coexistence of topological Dirac semimetal and topological insulator states in the vicinity of Fermi energy (EF) in the titanium-based oxypnictide superconductor BaTi2Sb2O. Further spin-resolved measurements confirm its spin-helical surface states around EF, which are topologically protected and give an opportunity for realization of Majorana zero modes and Majorana flat bands in one material. Hosting dual topological states, the intrinsic superconductor BaTi2Sb2O is expected to be a promising platform for further investigation of topological superconductivity.",

author = "Z. Huang and Liu, \{W. L.\} and Wang, \{H. Y.\} and Su, \{Y. L.\} and Liu, \{Z. T.\} and Shi, \{X. B.\} and Gao, \{S. Y.\} and Chen, \{Z. Y.\} and Yan, \{Y. J.\} and Jiang, \{Z. C.\} and Liu, \{Z. H.\} and Liu, \{J. S.\} and Lu, \{X. L.\} and Yang, \{Y. C.\} and Zhou, \{R. X.\} and W. Xia and Huang, \{Y. B.\} and S. Qiao and Zhao, \{W. W.\} and Guo, \{Y. F.\} and G. Li and Shen, \{D. W.\}",

note = "Publisher Copyright: {\textcopyright} 2022, The Author(s).",

year = "2022",

month = dec,

doi = "10.1038/s41535-022-00477-z",

language = "英语",

volume = "7",

journal = "npj Quantum Materials",

issn = "2397-4648",

publisher = "Nature Publishing Group",

number = "1",

}

Huang, Z, Liu, WL, Wang, HY, Su, YL, Liu, ZT, Shi, XB, Gao, SY, Chen, ZY, Yan, YJ, Jiang, ZC, Liu, ZH, Liu, JS, Lu, XL, Yang, YC, Zhou, RX, Xia, W, Huang, YB, Qiao, S, Zhao, WW, Guo, YF, Li, G & Shen, DW 2022, 'Dual topological states in the layered titanium-based oxypnictide superconductor BaTi₂Sb₂O', npj Quantum Materials, vol. 7, no. 1, 70. https://doi.org/10.1038/s41535-022-00477-z

TY - JOUR

T1 - Dual topological states in the layered titanium-based oxypnictide superconductor BaTi2Sb2O

AU - Huang, Z.

AU - Liu, W. L.

AU - Wang, H. Y.

AU - Su, Y. L.

AU - Liu, Z. T.

AU - Shi, X. B.

AU - Gao, S. Y.

AU - Chen, Z. Y.

AU - Yan, Y. J.

AU - Jiang, Z. C.

AU - Liu, Z. H.

AU - Liu, J. S.

AU - Lu, X. L.

AU - Yang, Y. C.

AU - Zhou, R. X.

AU - Xia, W.

AU - Huang, Y. B.

AU - Qiao, S.

AU - Zhao, W. W.

AU - Guo, Y. F.

AU - Li, G.

AU - Shen, D. W.

PY - 2022/12

Y1 - 2022/12

N2 - Topological superconductors have long been predicted to host Majorana zero modes which obey non-Abelian statistics and have potential for realizing non-decoherence topological quantum computation. However, material realization of topological superconductors is still a challenge in condensed matter physics. Utilizing high-resolution angle-resolved photoemission spectroscopy and first-principles calculations, we predict and then unveil the coexistence of topological Dirac semimetal and topological insulator states in the vicinity of Fermi energy (EF) in the titanium-based oxypnictide superconductor BaTi2Sb2O. Further spin-resolved measurements confirm its spin-helical surface states around EF, which are topologically protected and give an opportunity for realization of Majorana zero modes and Majorana flat bands in one material. Hosting dual topological states, the intrinsic superconductor BaTi2Sb2O is expected to be a promising platform for further investigation of topological superconductivity.

AB - Topological superconductors have long been predicted to host Majorana zero modes which obey non-Abelian statistics and have potential for realizing non-decoherence topological quantum computation. However, material realization of topological superconductors is still a challenge in condensed matter physics. Utilizing high-resolution angle-resolved photoemission spectroscopy and first-principles calculations, we predict and then unveil the coexistence of topological Dirac semimetal and topological insulator states in the vicinity of Fermi energy (EF) in the titanium-based oxypnictide superconductor BaTi2Sb2O. Further spin-resolved measurements confirm its spin-helical surface states around EF, which are topologically protected and give an opportunity for realization of Majorana zero modes and Majorana flat bands in one material. Hosting dual topological states, the intrinsic superconductor BaTi2Sb2O is expected to be a promising platform for further investigation of topological superconductivity.

UR - https://www.scopus.com/pages/publications/85132995042

U2 - 10.1038/s41535-022-00477-z

DO - 10.1038/s41535-022-00477-z

M3 - 文章

AN - SCOPUS:85132995042

SN - 2397-4648

VL - 7

JO - npj Quantum Materials

JF - npj Quantum Materials

IS - 1

M1 - 70

ER -

Dual topological states in the layered titanium-based oxypnictide superconductor BaTi₂Sb₂O

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