Evidence for topologically protected surface states and a superconducting phase in [Tl4](Tl1-xSnx)Te3 using photoemission, specific heat, and magnetization measurements, and density functional theory

K. E. Arpino; D. C. Wallace; Y. F. Nie; T. Birol; P. D. C. King; S. Chatterjee; M. Uchida; S. M. Koohpayeh; J-J Wen; K. Page; C. J. Fennie; K. M. Shen; T. M. McQueen

doi:10.1103/PhysRevLett.112.017002

Evidence for topologically protected surface states and a superconducting phase in [Tl₄](Tl_1-xSn_x)Te₃using photoemission, specific heat, and magnetization measurements, and density functional theory

K. E. Arpino^*, D. C. Wallace, Y. F. Nie, T. Birol, P. D. C. King, S. Chatterjee, M. Uchida, S. M. Koohpayeh, J-J Wen, K. Page, C. J. Fennie, K. M. Shen, T. M. McQueen

^*Corresponding author for this work

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

Abstract

We report the discovery of surface states in the perovskite superconductor [Tl₄]TlTe₃ (Tl₅Te₃) and its nonsuperconducting tin-doped derivative [Tl₄](Tl_0.4Sn_0.6)Te₃ as observed by angle-resolved photoemission spectroscopy. Density functional theory calculations predict that the surface states are
protected by a Z₂ topology of the bulk band structure. Specific heat and magnetization measurements show that Tl₅Te₃ has a superconducting volume fraction in excess of 95%. Thus Tl₅Te₃ is an ideal material in which to study the interplay of bulk band topology and superconductivity.

Original language	English
Article number	017002
Number of pages	5
Journal	Physical Review Letters
Volume	112
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.112.017002
Publication status	Published - 8 Jan 2014

Keywords

Crystal
BI2SE3
BI2TE3

Access to Document

10.1103/PhysRevLett.112.017002

Cite this

Arpino, K. E., Wallace, D. C., Nie, Y. F., Birol, T., King, P. D. C., Chatterjee, S., Uchida, M., Koohpayeh, S. M., Wen, J.-J., Page, K., Fennie, C. J., Shen, K. M., & McQueen, T. M. (2014). Evidence for topologically protected surface states and a superconducting phase in [Tl₄](Tl_1-xSn_x)Te₃using photoemission, specific heat, and magnetization measurements, and density functional theory. Physical Review Letters, 112(1), Article 017002. https://doi.org/10.1103/PhysRevLett.112.017002

@article{6314577bdd6844dbbb9e00b3cfae0262,

title = "Evidence for topologically protected surface states and a superconducting phase in [Tl4](Tl1-xSnx)Te3 using photoemission, specific heat, and magnetization measurements, and density functional theory",

abstract = "We report the discovery of surface states in the perovskite superconductor [Tl4]TlTe3 (Tl5Te3) and its nonsuperconducting tin-doped derivative [Tl4](Tl0.4Sn0.6)Te3 as observed by angle-resolved photoemission spectroscopy. Density functional theory calculations predict that the surface states are protected by a Z2 topology of the bulk band structure. Specific heat and magnetization measurements show that Tl5Te3 has a superconducting volume fraction in excess of 95%. Thus Tl5Te3 is an ideal material in which to study the interplay of bulk band topology and superconductivity.",

keywords = "Crystal, BI2SE3, BI2TE3",

author = "Arpino, {K. E.} and Wallace, {D. C.} and Nie, {Y. F.} and T. Birol and King, {P. D. C.} and S. Chatterjee and M. Uchida and Koohpayeh, {S. M.} and J-J Wen and K. Page and Fennie, {C. J.} and Shen, {K. M.} and McQueen, {T. M.}",

year = "2014",

month = jan,

day = "8",

doi = "10.1103/PhysRevLett.112.017002",

language = "English",

volume = "112",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "1",

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Arpino, KE, Wallace, DC, Nie, YF, Birol, T, King, PDC, Chatterjee, S, Uchida, M, Koohpayeh, SM, Wen, J-J, Page, K, Fennie, CJ, Shen, KM & McQueen, TM 2014, 'Evidence for topologically protected surface states and a superconducting phase in [Tl₄](Tl_1-xSn_x)Te₃using photoemission, specific heat, and magnetization measurements, and density functional theory', Physical Review Letters, vol. 112, no. 1, 017002. https://doi.org/10.1103/PhysRevLett.112.017002

Evidence for topologically protected surface states and a superconducting phase in [Tl₄](Tl_1-xSn_x)Te₃using photoemission, specific heat, and magnetization measurements, and density functional theory. / Arpino, K. E.; Wallace, D. C.; Nie, Y. F. et al.
In: Physical Review Letters, Vol. 112, No. 1, 017002, 08.01.2014.

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

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T1 - Evidence for topologically protected surface states and a superconducting phase in [Tl4](Tl1-xSnx)Te3 using photoemission, specific heat, and magnetization measurements, and density functional theory

AU - Arpino, K. E.

AU - Wallace, D. C.

AU - Nie, Y. F.

AU - Birol, T.

AU - King, P. D. C.

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AU - Uchida, M.

AU - Koohpayeh, S. M.

AU - Wen, J-J

AU - Page, K.

AU - Fennie, C. J.

AU - Shen, K. M.

AU - McQueen, T. M.

PY - 2014/1/8

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AB - We report the discovery of surface states in the perovskite superconductor [Tl4]TlTe3 (Tl5Te3) and its nonsuperconducting tin-doped derivative [Tl4](Tl0.4Sn0.6)Te3 as observed by angle-resolved photoemission spectroscopy. Density functional theory calculations predict that the surface states are protected by a Z2 topology of the bulk band structure. Specific heat and magnetization measurements show that Tl5Te3 has a superconducting volume fraction in excess of 95%. Thus Tl5Te3 is an ideal material in which to study the interplay of bulk band topology and superconductivity.

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