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Condensed Matter > Mesoscale and Nanoscale Physics
Title: Observation of giant nonreciprocal charge transport from quantum Hall states in a topological insulator
(Submitted on 18 Jul 2023 (v1), last revised 17 Mar 2024 (this version, v3))
Abstract: Symmetry breaking in quantum materials is of great importance and can lead to nonreciprocal charge transport. Topological insulators provide a unique platform to study nonreciprocal charge transport due to their surface states, especially quantum Hall states under external magnetic field. Here, we report the observation of nonreciprocal charge transport mediated by quantum Hall states in devices composed of the intrinsic topological insulator Sn-Bi1.1Sb0.9Te2S, which is attributed to asymmetric scattering between quantum Hall states and Dirac surface states. A giant nonreciprocal coefficient of up to 2.26*10^5 A^-1 is found. Our work not only reveals the properties of nonreciprocal charge transport of quantum Hall states in topological insulators, but also paves the way for future electronic devices.
Submission history
From: Fengqi Song [view email][v1] Tue, 18 Jul 2023 01:25:11 GMT (1196kb)
[v2] Mon, 11 Mar 2024 07:22:15 GMT (1220kb)
[v3] Sun, 17 Mar 2024 07:43:19 GMT (1231kb)
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