Nanotechnology Now – Press Launch: Layer Corridor Impact and Hidden Berry Curvature in Antiferromagnetic Insulators

House > Press > Layer Corridor Impact and Hidden Berry Curvature in Antiferromagnetic Insulators

Schematics of the layer Corridor impact (a) and the layer-locked hidden Berry curvature (b) in a double-layer antiferromagnetic insulator. Within the layer Corridor impact, electrons spontaneously drift to reverse sides of various layers (the pink and blue curves with arrows) as a result of layer-locked latent Berry curvature. (c)-(d) When a perpendicular electrical discipline is utilized (blue-green arrow), the system reveals layer-locked anomalous Corridor results that may be tuned by the course of the electrical discipline. The yellow arrows point out the antiferromagnetic configurations. The inexperienced arrows point out the electrical discipline within the Ey airplane for the Corridor measurement. CREDIT © Science China Press

Abstract:
This research was led by Prof. Hai-Zhou Lu and Prof. Qihang Liu (Shenzhen Institute of Quantum Science and Engineering and Division of Physics, Southern College of Science and Know-how).

Layer Corridor Impact and Hidden Berry Curvature in Antiferromagnetic Insulators

Beijing, China | Posted on September 30, 2022

Each time a brand new Corridor impact is found, a wave of analysis will probably be impressed. The primary experiment on a brand new kind of Corridor impact, the layer Corridor impact, was reported by Xu’s group at Harvard College. Within the layer Corridor impact, electrons from the highest and backside layers are deflected in reverse instructions and measured by making use of an out-of-plane electrical discipline to interrupt the PT symmetry [see Figures (c) and (d) below], the place P and T characterize inversion symmetry and time-reversal symmetry, respectively. The authors proposed a common image when it comes to hidden Berry curvature for the layer Corridor impact [Figure (b)]. They present that the existence of the Corridor impact layer is irrelevant to the electrical discipline [Figure (a)], which is analogous to the Corridor valley/spin impact. Due to this fact, in addition they proposed another method, viz. the non-local measurement, to determine the Corridor impact of the layer, with out making use of the electrical discipline.

Then again, the authors revealed three totally different options to boost the layer Corridor impact in PT-symmetric antiferromagnetic insulators. As well as, the authors proposed extra materials candidates for the layer Corridor impact, which is able to encourage extra experimental analysis. Moreover, the hidden physics could be generalized to many levels of freedom, together with spin, orbital, and round polarization sooner or later.

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Bei Yan
Science China Press

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Hai-Zhou Lu
Shenzhen Institute of Quantum Science and Engineering and Division of Physics, Southern College of Science and Know-how (SUSTech)

Copyright © Science China Press

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