Topological phase diagram and saddle point singularity in a tunable topological crystalline insulator

Madhab Neupane; Su Yang Xu; R. Sankar; Q. Gibson; Y. J. Wang; I. Belopolski; N. Alidoust; G. Bian; P. P. Shibayev; D. S. Sanchez; Y. Ohtsubo; A. Taleb-Ibrahimi; S. Basak; W. F. Tsai; H. Lin; Tomasz Durakiewicz; R. J. Cava; A. Bansil; F. C. Chou; M. Z. Hasan

doi:10.1103/PhysRevB.92.075131

Topological phase diagram and saddle point singularity in a tunable topological crystalline insulator

Madhab Neupane, Su Yang Xu, R. Sankar, Q. Gibson, Y. J. Wang, I. Belopolski, N. Alidoust, G. Bian, P. P. Shibayev, D. S. Sanchez, Y. Ohtsubo, A. Taleb-Ibrahimi, S. Basak, W. F. Tsai, H. Lin, Tomasz Durakiewicz, R. J. Cava, A. Bansil, F. C. Chou, M. Z. Hasan

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Abstract

We report the evolution of the surface electronic structure and surface material properties of a topological crystalline insulator (TCI), Pb1-xSnxSe, as a function of various material parameters including composition x, temperature T, and crystal structure. Our spectroscopic data demonstrate the electronic ground-state condition for the saddle point singularity, the tunability of surface chemical potential, and the surface states' response to circularly polarized light. Our results show that each material parameter can tune the system between the trivial and topological phase in a distinct way, unlike that seen in Bi2Se3 and related compounds, leading to a rich topological phase diagram. Our systematic studies of the TCI Pb1-xSnxSe are a valuable materials guide to realize new topological phenomena.

Original language	English (US)
Article number	075131
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	92
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.92.075131
State	Published - Aug 20 2015

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.92.075131

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Neupane, M., Xu, S. Y., Sankar, R., Gibson, Q., Wang, Y. J., Belopolski, I., Alidoust, N., Bian, G., Shibayev, P. P., Sanchez, D. S., Ohtsubo, Y., Taleb-Ibrahimi, A., Basak, S., Tsai, W. F., Lin, H., Durakiewicz, T., Cava, R. J., Bansil, A., Chou, F. C., & Hasan, M. Z. (2015). Topological phase diagram and saddle point singularity in a tunable topological crystalline insulator. Physical Review B - Condensed Matter and Materials Physics, 92(7), Article 075131. https://doi.org/10.1103/PhysRevB.92.075131

@article{98a1aec0ca2f49fbb108655e0f1d8934,

title = "Topological phase diagram and saddle point singularity in a tunable topological crystalline insulator",

abstract = "We report the evolution of the surface electronic structure and surface material properties of a topological crystalline insulator (TCI), Pb1-xSnxSe, as a function of various material parameters including composition x, temperature T, and crystal structure. Our spectroscopic data demonstrate the electronic ground-state condition for the saddle point singularity, the tunability of surface chemical potential, and the surface states' response to circularly polarized light. Our results show that each material parameter can tune the system between the trivial and topological phase in a distinct way, unlike that seen in Bi2Se3 and related compounds, leading to a rich topological phase diagram. Our systematic studies of the TCI Pb1-xSnxSe are a valuable materials guide to realize new topological phenomena.",

author = "Madhab Neupane and Xu, {Su Yang} and R. Sankar and Q. Gibson and Wang, {Y. J.} and I. Belopolski and N. Alidoust and G. Bian and Shibayev, {P. P.} and Sanchez, {D. S.} and Y. Ohtsubo and A. Taleb-Ibrahimi and S. Basak and Tsai, {W. F.} and H. Lin and Tomasz Durakiewicz and Cava, {R. J.} and A. Bansil and Chou, {F. C.} and Hasan, {M. Z.}",

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

year = "2015",

month = aug,

day = "20",

doi = "10.1103/PhysRevB.92.075131",

language = "English (US)",

volume = "92",

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Neupane, M, Xu, SY, Sankar, R, Gibson, Q, Wang, YJ, Belopolski, I, Alidoust, N, Bian, G, Shibayev, PP, Sanchez, DS, Ohtsubo, Y, Taleb-Ibrahimi, A, Basak, S, Tsai, WF, Lin, H, Durakiewicz, T, Cava, RJ, Bansil, A, Chou, FC & Hasan, MZ 2015, 'Topological phase diagram and saddle point singularity in a tunable topological crystalline insulator', Physical Review B - Condensed Matter and Materials Physics, vol. 92, no. 7, 075131. https://doi.org/10.1103/PhysRevB.92.075131

TY - JOUR

T1 - Topological phase diagram and saddle point singularity in a tunable topological crystalline insulator

AU - Neupane, Madhab

AU - Xu, Su Yang

AU - Sankar, R.

AU - Gibson, Q.

AU - Wang, Y. J.

AU - Belopolski, I.

AU - Alidoust, N.

AU - Bian, G.

AU - Shibayev, P. P.

AU - Sanchez, D. S.

AU - Ohtsubo, Y.

AU - Taleb-Ibrahimi, A.

AU - Basak, S.

AU - Tsai, W. F.

AU - Lin, H.

AU - Durakiewicz, Tomasz

AU - Cava, R. J.

AU - Bansil, A.

AU - Chou, F. C.

AU - Hasan, M. Z.

PY - 2015/8/20

Y1 - 2015/8/20

N2 - We report the evolution of the surface electronic structure and surface material properties of a topological crystalline insulator (TCI), Pb1-xSnxSe, as a function of various material parameters including composition x, temperature T, and crystal structure. Our spectroscopic data demonstrate the electronic ground-state condition for the saddle point singularity, the tunability of surface chemical potential, and the surface states' response to circularly polarized light. Our results show that each material parameter can tune the system between the trivial and topological phase in a distinct way, unlike that seen in Bi2Se3 and related compounds, leading to a rich topological phase diagram. Our systematic studies of the TCI Pb1-xSnxSe are a valuable materials guide to realize new topological phenomena.

AB - We report the evolution of the surface electronic structure and surface material properties of a topological crystalline insulator (TCI), Pb1-xSnxSe, as a function of various material parameters including composition x, temperature T, and crystal structure. Our spectroscopic data demonstrate the electronic ground-state condition for the saddle point singularity, the tunability of surface chemical potential, and the surface states' response to circularly polarized light. Our results show that each material parameter can tune the system between the trivial and topological phase in a distinct way, unlike that seen in Bi2Se3 and related compounds, leading to a rich topological phase diagram. Our systematic studies of the TCI Pb1-xSnxSe are a valuable materials guide to realize new topological phenomena.

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JF - Physical Review B - Condensed Matter and Materials Physics

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ER -

Topological phase diagram and saddle point singularity in a tunable topological crystalline insulator

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