Temperature-Induced Topological Phase Transition in HgTe Quantum Wells

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Temperature-Induced Topological Phase Transition in HgTe Quantum Wells. / Kadykov, A. M.; Krishtopenko, S. S.; Jouault, B. et al.

In: Physical Review Letters, Vol. 120, No. 8, 086401, 22.02.2018.

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

Harvard

Kadykov, AM, Krishtopenko, SS, Jouault, B, Desrat, W, Knap, W, Ruffenach, S, Consejo, C, Torres, J, Morozov, SV, Mikhailov, NN, Dvoretskii, SA & Teppe, F 2018, 'Temperature-Induced Topological Phase Transition in HgTe Quantum Wells', Physical Review Letters, vol. 120, no. 8, 086401. https://doi.org/10.1103/PhysRevLett.120.086401

APA

Kadykov, A. M., Krishtopenko, S. S., Jouault, B., Desrat, W., Knap, W., Ruffenach, S., Consejo, C., Torres, J., Morozov, S. V., Mikhailov, N. N., Dvoretskii, S. A., & Teppe, F. (2018). Temperature-Induced Topological Phase Transition in HgTe Quantum Wells. Physical Review Letters, 120(8), [086401]. https://doi.org/10.1103/PhysRevLett.120.086401

Vancouver

Kadykov AM, Krishtopenko SS, Jouault B, Desrat W, Knap W, Ruffenach S et al. Temperature-Induced Topological Phase Transition in HgTe Quantum Wells. Physical Review Letters. 2018 Feb 22;120(8):086401. doi: 10.1103/PhysRevLett.120.086401

Author

Kadykov, A. M. ; Krishtopenko, S. S. ; Jouault, B. et al. / Temperature-Induced Topological Phase Transition in HgTe Quantum Wells. In: Physical Review Letters. 2018 ; Vol. 120, No. 8.

BibTeX

@article{20545a1892634761ad119d69063bbeb2,

title = "Temperature-Induced Topological Phase Transition in HgTe Quantum Wells",

abstract = "We report a direct observation of temperature-induced topological phase transition between the trivial and topological insulator states in an HgTe quantum well. By using a gated Hall bar device, we measure and represent Landau levels in fan charts at different temperatures, and we follow the temperature evolution of a peculiar pair of {"}zero-mode{"} Landau levels, which split from the edge of electronlike and holelike subbands. Their crossing at a critical magnetic field Bc is a characteristic of inverted band structure in the quantum well. By measuring the temperature dependence of Bc, we directly extract the critical temperature Tc at which the bulk band gap vanishes and the topological phase transition occurs. Above this critical temperature, the opening of a trivial gap is clearly observed.",

keywords = "CYCLOTRON-RESONANCE, STATE",

author = "Kadykov, {A. M.} and Krishtopenko, {S. S.} and B. Jouault and W. Desrat and W. Knap and S. Ruffenach and C. Consejo and J. Torres and Morozov, {S. V.} and Mikhailov, {N. N.} and Dvoretskii, {S. A.} and F. Teppe",

note = "Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = feb,

day = "22",

doi = "10.1103/PhysRevLett.120.086401",

language = "English",

volume = "120",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "8",

}

RIS

TY - JOUR

T1 - Temperature-Induced Topological Phase Transition in HgTe Quantum Wells

AU - Kadykov, A. M.

AU - Krishtopenko, S. S.

AU - Jouault, B.

AU - Desrat, W.

AU - Knap, W.

AU - Ruffenach, S.

AU - Consejo, C.

AU - Torres, J.

AU - Morozov, S. V.

AU - Mikhailov, N. N.

AU - Dvoretskii, S. A.

AU - Teppe, F.

PY - 2018/2/22

Y1 - 2018/2/22

N2 - We report a direct observation of temperature-induced topological phase transition between the trivial and topological insulator states in an HgTe quantum well. By using a gated Hall bar device, we measure and represent Landau levels in fan charts at different temperatures, and we follow the temperature evolution of a peculiar pair of "zero-mode" Landau levels, which split from the edge of electronlike and holelike subbands. Their crossing at a critical magnetic field Bc is a characteristic of inverted band structure in the quantum well. By measuring the temperature dependence of Bc, we directly extract the critical temperature Tc at which the bulk band gap vanishes and the topological phase transition occurs. Above this critical temperature, the opening of a trivial gap is clearly observed.

AB - We report a direct observation of temperature-induced topological phase transition between the trivial and topological insulator states in an HgTe quantum well. By using a gated Hall bar device, we measure and represent Landau levels in fan charts at different temperatures, and we follow the temperature evolution of a peculiar pair of "zero-mode" Landau levels, which split from the edge of electronlike and holelike subbands. Their crossing at a critical magnetic field Bc is a characteristic of inverted band structure in the quantum well. By measuring the temperature dependence of Bc, we directly extract the critical temperature Tc at which the bulk band gap vanishes and the topological phase transition occurs. Above this critical temperature, the opening of a trivial gap is clearly observed.

KW - CYCLOTRON-RESONANCE

KW - STATE

UR - http://www.scopus.com/inward/record.url?scp=85042873252&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.120.086401

DO - 10.1103/PhysRevLett.120.086401

M3 - Article

C2 - 29543000

AN - SCOPUS:85042873252

VL - 120

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 8

M1 - 086401

ER -

ID: 10452259