Standard

Probing spin helical surface states in topological HgTe nanowires. / Ziegler, J.; Kozlovsky, R.; Gorini, C. и др.

в: Physical Review B, Том 97, № 3, 035157, 29.01.2018.

Результаты исследований: Научные публикации в периодических изданияхстатьяРецензирование

Harvard

Ziegler, J, Kozlovsky, R, Gorini, C, Liu, MH, Weishäupl, S, Maier, H, Fischer, R, Kozlov, DA, Kvon, ZD, Mikhailov, N, Dvoretsky, SA, Richter, K & Weiss, D 2018, 'Probing spin helical surface states in topological HgTe nanowires', Physical Review B, Том. 97, № 3, 035157. https://doi.org/10.1103/PhysRevB.97.035157

APA

Ziegler, J., Kozlovsky, R., Gorini, C., Liu, M. H., Weishäupl, S., Maier, H., Fischer, R., Kozlov, D. A., Kvon, Z. D., Mikhailov, N., Dvoretsky, S. A., Richter, K., & Weiss, D. (2018). Probing spin helical surface states in topological HgTe nanowires. Physical Review B, 97(3), [035157]. https://doi.org/10.1103/PhysRevB.97.035157

Vancouver

Ziegler J, Kozlovsky R, Gorini C, Liu MH, Weishäupl S, Maier H и др. Probing spin helical surface states in topological HgTe nanowires. Physical Review B. 2018 янв. 29;97(3):035157. doi: 10.1103/PhysRevB.97.035157

Author

Ziegler, J. ; Kozlovsky, R. ; Gorini, C. и др. / Probing spin helical surface states in topological HgTe nanowires. в: Physical Review B. 2018 ; Том 97, № 3.

BibTeX

@article{5878b8c0d4ee4ae1b0922a1274d3f91c,
title = "Probing spin helical surface states in topological HgTe nanowires",
abstract = "Nanowires with helical surface states represent key prerequisites for observing and exploiting phase-coherent topological conductance phenomena, such as spin-momentum locked quantum transport or topological superconductivity. We demonstrate in a joint experimental and theoretical study that gated nanowires fabricated from high-mobility strained HgTe, known as a bulk topological insulator, indeed preserve the topological nature of the surface states, that moreover extend phase-coherently across the entire wire geometry. The phase-coherence lengths are enhanced up to 5μm when tuning the wires into the bulk gap, so as to single out topological transport. The nanowires exhibit distinct conductance oscillations, both as a function of the flux due to an axial magnetic field and of a gate voltage. The observed h/e-periodic Aharonov-Bohm-type modulations indicate surface-mediated quasiballistic transport. Furthermore, an in-depth analysis of the scaling of the observed gate-dependent conductance oscillations reveals the topological nature of these surface states. To this end we combined numerical tight-binding calculations of the quantum magnetoconductance with simulations of the electrostatics, accounting for the gate-induced inhomogeneous charge carrier densities around the wires. We find that helical transport prevails even for strongly inhomogeneous gating and is governed by flux-sensitive high-angular momentum surface states that extend around the entire wire circumference.",
keywords = "INSULATOR NANORIBBONS, TRANSPORT, CONDUCTORS",
author = "J. Ziegler and R. Kozlovsky and C. Gorini and Liu, {M. H.} and S. Weish{\"a}upl and H. Maier and R. Fischer and Kozlov, {D. A.} and Kvon, {Z. D.} and N. Mikhailov and Dvoretsky, {S. A.} and K. Richter and D. Weiss",
year = "2018",
month = jan,
day = "29",
doi = "10.1103/PhysRevB.97.035157",
language = "English",
volume = "97",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "3",

}

RIS

TY - JOUR

T1 - Probing spin helical surface states in topological HgTe nanowires

AU - Ziegler, J.

AU - Kozlovsky, R.

AU - Gorini, C.

AU - Liu, M. H.

AU - Weishäupl, S.

AU - Maier, H.

AU - Fischer, R.

AU - Kozlov, D. A.

AU - Kvon, Z. D.

AU - Mikhailov, N.

AU - Dvoretsky, S. A.

AU - Richter, K.

AU - Weiss, D.

PY - 2018/1/29

Y1 - 2018/1/29

N2 - Nanowires with helical surface states represent key prerequisites for observing and exploiting phase-coherent topological conductance phenomena, such as spin-momentum locked quantum transport or topological superconductivity. We demonstrate in a joint experimental and theoretical study that gated nanowires fabricated from high-mobility strained HgTe, known as a bulk topological insulator, indeed preserve the topological nature of the surface states, that moreover extend phase-coherently across the entire wire geometry. The phase-coherence lengths are enhanced up to 5μm when tuning the wires into the bulk gap, so as to single out topological transport. The nanowires exhibit distinct conductance oscillations, both as a function of the flux due to an axial magnetic field and of a gate voltage. The observed h/e-periodic Aharonov-Bohm-type modulations indicate surface-mediated quasiballistic transport. Furthermore, an in-depth analysis of the scaling of the observed gate-dependent conductance oscillations reveals the topological nature of these surface states. To this end we combined numerical tight-binding calculations of the quantum magnetoconductance with simulations of the electrostatics, accounting for the gate-induced inhomogeneous charge carrier densities around the wires. We find that helical transport prevails even for strongly inhomogeneous gating and is governed by flux-sensitive high-angular momentum surface states that extend around the entire wire circumference.

AB - Nanowires with helical surface states represent key prerequisites for observing and exploiting phase-coherent topological conductance phenomena, such as spin-momentum locked quantum transport or topological superconductivity. We demonstrate in a joint experimental and theoretical study that gated nanowires fabricated from high-mobility strained HgTe, known as a bulk topological insulator, indeed preserve the topological nature of the surface states, that moreover extend phase-coherently across the entire wire geometry. The phase-coherence lengths are enhanced up to 5μm when tuning the wires into the bulk gap, so as to single out topological transport. The nanowires exhibit distinct conductance oscillations, both as a function of the flux due to an axial magnetic field and of a gate voltage. The observed h/e-periodic Aharonov-Bohm-type modulations indicate surface-mediated quasiballistic transport. Furthermore, an in-depth analysis of the scaling of the observed gate-dependent conductance oscillations reveals the topological nature of these surface states. To this end we combined numerical tight-binding calculations of the quantum magnetoconductance with simulations of the electrostatics, accounting for the gate-induced inhomogeneous charge carrier densities around the wires. We find that helical transport prevails even for strongly inhomogeneous gating and is governed by flux-sensitive high-angular momentum surface states that extend around the entire wire circumference.

KW - INSULATOR NANORIBBONS

KW - TRANSPORT

KW - CONDUCTORS

UR - http://www.scopus.com/inward/record.url?scp=85041195228&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.97.035157

DO - 10.1103/PhysRevB.97.035157

M3 - Article

AN - SCOPUS:85041195228

VL - 97

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 3

M1 - 035157

ER -

ID: 10452315