Electronic structure of correlated topological insulator candidate YbB6 studied by photoemission and quantum oscillation

T. Zhang; G. Li; S. C. Sun; N. Qin; L. Kang; S. H. Yao; H. M. Weng; S. K. Mo; L. Li; Z. K. Liu; L. X. Yang; Y. L. Chen

doi:10.1088/1674-1056/ab6206

Electronic structure of correlated topological insulator candidate YbB₆ studied by photoemission and quantum oscillation

T. Zhang, G. Li, S. C. Sun, N. Qin, L. Kang, S. H. Yao, H. M. Weng, S. K. Mo, L. Li, Z. K. Liu, L. X. Yang, Y. L. Chen^*

^*Corresponding author for this work

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

1 Citation (Scopus)

Abstract

Angle-resolved photoemission spectroscopy (ARPES) and torque magnetometry (TM) measurements have been carried out to study the electronic structures of a correlated topological insulator (TI) candidate YbB₆. We observed clear surface states on the [001] surface centered at the Γ and M points of the surface Brillouin zone. Interestingly, the fermiology revealed by the quantum oscillation of TM measurements agrees excellently with ARPES measurements. Moreover, the band structures we observed suggest that the band inversion in YbB₆ happens between the Yb_5d and B_2p bands, instead of the Yb_5d and Yb_4f bands as suggested by previous theoretical investigation, which will help settle the heavy debate regarding the topological nature of samarium/ytterbium hexaborides.

Original language	English
Article number	017304
Journal	Chinese Physics B
Volume	29
Issue number	1
DOIs	https://doi.org/10.1088/1674-1056/ab6206
Publication status	Published - 2020
Externally published	Yes

Keywords

electronic structure
surface states
topological insulator

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10.1088/1674-1056/ab6206

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title = "Electronic structure of correlated topological insulator candidate YbB6 studied by photoemission and quantum oscillation",

abstract = "Angle-resolved photoemission spectroscopy (ARPES) and torque magnetometry (TM) measurements have been carried out to study the electronic structures of a correlated topological insulator (TI) candidate YbB6. We observed clear surface states on the [001] surface centered at the Γ and M points of the surface Brillouin zone. Interestingly, the fermiology revealed by the quantum oscillation of TM measurements agrees excellently with ARPES measurements. Moreover, the band structures we observed suggest that the band inversion in YbB6 happens between the Yb5d and B2p bands, instead of the Yb5d and Yb4f bands as suggested by previous theoretical investigation, which will help settle the heavy debate regarding the topological nature of samarium/ytterbium hexaborides.",

keywords = "electronic structure, surface states, topological insulator",

author = "T. Zhang and G. Li and Sun, {S. C.} and N. Qin and L. Kang and Yao, {S. H.} and Weng, {H. M.} and Mo, {S. K.} and L. Li and Liu, {Z. K.} and Yang, {L. X.} and Chen, {Y. L.}",

note = "Publisher Copyright: {\textcopyright} 2020 Chinese Physical Society and IOP Publishing Ltd.",

year = "2020",

doi = "10.1088/1674-1056/ab6206",

language = "English",

volume = "29",

journal = "Chinese Physics B",

issn = "1674-1056",

publisher = "IOP Publishing Ltd.",

number = "1",

}

TY - JOUR

T1 - Electronic structure of correlated topological insulator candidate YbB6 studied by photoemission and quantum oscillation

AU - Zhang, T.

AU - Li, G.

AU - Sun, S. C.

AU - Qin, N.

AU - Kang, L.

AU - Yao, S. H.

AU - Weng, H. M.

AU - Mo, S. K.

AU - Li, L.

AU - Liu, Z. K.

AU - Yang, L. X.

AU - Chen, Y. L.

PY - 2020

Y1 - 2020

N2 - Angle-resolved photoemission spectroscopy (ARPES) and torque magnetometry (TM) measurements have been carried out to study the electronic structures of a correlated topological insulator (TI) candidate YbB6. We observed clear surface states on the [001] surface centered at the Γ and M points of the surface Brillouin zone. Interestingly, the fermiology revealed by the quantum oscillation of TM measurements agrees excellently with ARPES measurements. Moreover, the band structures we observed suggest that the band inversion in YbB6 happens between the Yb5d and B2p bands, instead of the Yb5d and Yb4f bands as suggested by previous theoretical investigation, which will help settle the heavy debate regarding the topological nature of samarium/ytterbium hexaborides.

AB - Angle-resolved photoemission spectroscopy (ARPES) and torque magnetometry (TM) measurements have been carried out to study the electronic structures of a correlated topological insulator (TI) candidate YbB6. We observed clear surface states on the [001] surface centered at the Γ and M points of the surface Brillouin zone. Interestingly, the fermiology revealed by the quantum oscillation of TM measurements agrees excellently with ARPES measurements. Moreover, the band structures we observed suggest that the band inversion in YbB6 happens between the Yb5d and B2p bands, instead of the Yb5d and Yb4f bands as suggested by previous theoretical investigation, which will help settle the heavy debate regarding the topological nature of samarium/ytterbium hexaborides.

KW - electronic structure

KW - surface states

KW - topological insulator

UR - http://www.scopus.com/inward/record.url?scp=85079389417&partnerID=8YFLogxK

U2 - 10.1088/1674-1056/ab6206

DO - 10.1088/1674-1056/ab6206

M3 - Article

AN - SCOPUS:85079389417

SN - 1674-1056

VL - 29

JO - Chinese Physics B

JF - Chinese Physics B

IS - 1

M1 - 017304

ER -

Electronic structure of correlated topological insulator candidate YbB₆ studied by photoemission and quantum oscillation

Abstract

Keywords

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