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Phase transition and anomalous scaling in the quantum Hall transport of topological insulator Sn-Bi1.1Sb0.9Te2S devices

The scaling physics of quantum Hall transport in optimized topological insulators with a plateau precision of ~1/1000 e2/h is considered. Two exponential scaling regimes are observed in temperature-dependent transport dissipation, one of which accords with thermal activation behavior with a gap of 2... Full description

Journal Title: arXiv.org Dec 13, 2018
Main Author: Xie, Faji
Other Authors: Zhang, Shuai , Liu, Qianqian , Ting-Ting, Kang , Wang, Rui , Wei, Boyuan , Xing-Chen, Pan , Zhang, Minhao , Wang, Xuefeng , Li, Pi , Yu, Geliang , Wang, Baigeng , Song, Fengqi
Format: Electronic Article Electronic Article
Language: English
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ID: DOI: 10.1103/PhysRevB.99.081113
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recordid: proquest2156285981
title: Phase transition and anomalous scaling in the quantum Hall transport of topological insulator Sn-Bi1.1Sb0.9Te2S devices
format: Article
creator:
  • Xie, Faji
  • Zhang, Shuai
  • Liu, Qianqian
  • Ting-Ting, Kang
  • Wang, Rui
  • Wei, Boyuan
  • Xing-Chen, Pan
  • Zhang, Minhao
  • Wang, Xuefeng
  • Li, Pi
  • Yu, Geliang
  • Wang, Baigeng
  • Song, Fengqi
subjects:
  • Transport
  • Phase Transitions
  • Electrons
  • Scaling
  • Electrons
  • Temperature Dependence
  • Quantum Tunnelling
  • Percolation
  • Electron Gas
  • Insulators
  • Energy Dissipation
  • Phase Transitions
ispartof: arXiv.org, Dec 13, 2018
description: The scaling physics of quantum Hall transport in optimized topological insulators with a plateau precision of ~1/1000 e2/h is considered. Two exponential scaling regimes are observed in temperature-dependent transport dissipation, one of which accords with thermal activation behavior with a gap of 2.8 meV (> 20 K), the other being attributed to variable range hopping (1-20 K). Magnetic field-driven plateau-to-plateau transition gives scaling relations of (dR\(_{xy}\)/dB)\(^{max}\) \propto T\(^{-\kappa}\) and \DeltaB\(^{-1}\) \propto T\(^{-\kappa}\) with a consistent exponent of \kappa ~ 0.2, which is half the universal value for a conventional two-dimensional electron gas. This is evidence of percolation assisted by quantum tunneling, and reveals the dominance of electron-electron interaction of the topological surface states.
language: eng
source:
identifier: DOI: 10.1103/PhysRevB.99.081113
fulltext: fulltext_linktorsrc
url: Link


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titlePhase transition and anomalous scaling in the quantum Hall transport of topological insulator Sn-Bi1.1Sb0.9Te2S devices
creatorXie, Faji ; Zhang, Shuai ; Liu, Qianqian ; Ting-Ting, Kang ; Wang, Rui ; Wei, Boyuan ; Xing-Chen, Pan ; Zhang, Minhao ; Wang, Xuefeng ; Li, Pi ; Yu, Geliang ; Wang, Baigeng ; Song, Fengqi
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ispartofarXiv.org, Dec 13, 2018
identifierDOI: 10.1103/PhysRevB.99.081113
subjectTransport ; Phase Transitions ; Electrons ; Scaling ; Electrons ; Temperature Dependence ; Quantum Tunnelling ; Percolation ; Electron Gas ; Insulators ; Energy Dissipation ; Phase Transitions
descriptionThe scaling physics of quantum Hall transport in optimized topological insulators with a plateau precision of ~1/1000 e2/h is considered. Two exponential scaling regimes are observed in temperature-dependent transport dissipation, one of which accords with thermal activation behavior with a gap of 2.8 meV (> 20 K), the other being attributed to variable range hopping (1-20 K). Magnetic field-driven plateau-to-plateau transition gives scaling relations of (dR\(_{xy}\)/dB)\(^{max}\) \propto T\(^{-\kappa}\) and \DeltaB\(^{-1}\) \propto T\(^{-\kappa}\) with a consistent exponent of \kappa ~ 0.2, which is half the universal value for a conventional two-dimensional electron gas. This is evidence of percolation assisted by quantum tunneling, and reveals the dominance of electron-electron interaction of the topological surface states.
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titlePhase transition and anomalous scaling in the quantum Hall transport of topological insulator Sn-Bi1.1Sb0.9Te2S devices
descriptionThe scaling physics of quantum Hall transport in optimized topological insulators with a plateau precision of ~1/1000 e2/h is considered. Two exponential scaling regimes are observed in temperature-dependent transport dissipation, one of which accords with thermal activation behavior with a gap of 2.8 meV (> 20 K), the other being attributed to variable range hopping (1-20 K). Magnetic field-driven plateau-to-plateau transition gives scaling relations of (dR\(_{xy}\)/dB)\(^{max}\) \propto T\(^{-\kappa}\) and \DeltaB\(^{-1}\) \propto T\(^{-\kappa}\) with a consistent exponent of \kappa ~ 0.2, which is half the universal value for a conventional two-dimensional electron gas. This is evidence of percolation assisted by quantum tunneling, and reveals the dominance of electron-electron interaction of the topological surface states.
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titlePhase transition and anomalous scaling in the quantum Hall transport of topological insulator Sn-Bi1.1Sb0.9Te2S devices
authorXie, Faji ; Zhang, Shuai ; Liu, Qianqian ; Ting-Ting, Kang ; Wang, Rui ; Wei, Boyuan ; Xing-Chen, Pan ; Zhang, Minhao ; Wang, Xuefeng ; Li, Pi ; Yu, Geliang ; Wang, Baigeng ; Song, Fengqi
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abstractThe scaling physics of quantum Hall transport in optimized topological insulators with a plateau precision of ~1/1000 e2/h is considered. Two exponential scaling regimes are observed in temperature-dependent transport dissipation, one of which accords with thermal activation behavior with a gap of 2.8 meV (> 20 K), the other being attributed to variable range hopping (1-20 K). Magnetic field-driven plateau-to-plateau transition gives scaling relations of (dR\(_{xy}\)/dB)\(^{max}\) \propto T\(^{-\kappa}\) and \DeltaB\(^{-1}\) \propto T\(^{-\kappa}\) with a consistent exponent of \kappa ~ 0.2, which is half the universal value for a conventional two-dimensional electron gas. This is evidence of percolation assisted by quantum tunneling, and reveals the dominance of electron-electron interaction of the topological surface states.
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