Giant magnetochiral anisotropy from quantum-confined surface states of topological insulator nanowires
| Autor: | Henry F. Legg, Matthias Rößler, Felix Münning, Dingxun Fan, Oliver Breunig, Andrea Bliesener, Gertjan Lippertz, Anjana Uday, A. A. Taskin, Daniel Loss, Jelena Klinovaja, Yoichi Ando |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Technology
Condensed Matter - Materials Science Science & Technology Condensed Matter - Mesoscale and Nanoscale Physics Strongly Correlated Electrons (cond-mat.str-el) Materials Science Biomedical Engineering Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Bioengineering Materials Science Multidisciplinary Condensed Matter Physics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Atomic and Molecular Physics and Optics Condensed Matter - Strongly Correlated Electrons Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Science & Technology - Other Topics General Materials Science Electrical and Electronic Engineering Nanoscience & Nanotechnology |
| Zdroj: | Nature Nanotechnology |
| Popis: | Wireless technology relies on the conversion of alternating electromagnetic fields to direct currents, a process known as rectification. While rectifiers are normally based on semiconductor diodes, quantum mechanical non-reciprocal transport effects that enable highly controllable rectification have recently been discovered. One such effect is magnetochiral anisotropy (MCA), where the resistance of a material or a device depends on both the direction of current flow and an applied magnetic field. However, the size of rectification possible due to MCA is usually extremely small, because MCA relies on inversion symmetry breaking leading to the manifestation of spin-orbit coupling, which is a relativistic effect. In typical materials the rectification coefficient $\gamma$ due to MCA is usually $|\gamma| \lesssim 1$ ${\rm A^{-1} T^{-1}}$ and the maximum values reported so far are $|\gamma| \sim 100$ ${\rm A^{-1} T^{-1}}$ in carbon nanotubes and ZrTe$_5$. Here, to overcome this limitation, we artificially break inversion symmetry via an applied gate voltage in thin topological insulator (TI) nanowire heterostructures and theoretically predict that such a symmetry breaking can lead to a giant MCA effect. Our prediction is confirmed via experiments on thin bulk-insulating (Bi$_{1-x}$Sb$_{x}$)$_2$Te$_3$ TI nanowires, in which we observe an MCA consistent with theory and $|\gamma| \sim 100000$ ${\rm A^{-1} T^{-1}}$, the largest ever reported MCA rectification coefficient in a normal conductor. Comment: 7 pages of main text with 3 figures. This version of the article has been accepted for publication, after peer review, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections |
| Databáze: | OpenAIRE |
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