Cited 2 time in webofscience Cited 3 time in scopus

Anomalous Electron Dynamics Induced through the Valley Magnetic Domain: A Pathway to Valleytronic Current Processing

Title
Anomalous Electron Dynamics Induced through the Valley Magnetic Domain: A Pathway to Valleytronic Current Processing
Authors
Kim, YoungjaeLee, JaeDong
DGIST Authors
Kim, Youngjae; Lee, JaeDong
Issue Date
2019-06
Citation
Nano Letters, 19(6), 4166-4173
Type
Article
Article Type
Article
Author Keywords
anomalous transverse currentsymmetry-broken transverse diodevalley Hall effectvalley magnetic domainValley magnetoelectric effect
Keywords
MagnetizationMagnetoelectric effectsModulationMolybdenum compoundsSulfur compoundsDynamicsElectric fieldsFruitsLandformsLayered semiconductorsMagnetic domainsCurrent modulationCurrent processingCurrent rectificationsElectron dynamicsExternal electric fieldHomogeneous distributionPotential device applicationsTransverse currentsElectric rectifiers
ISSN
1530-6984
Abstract
An interplay between an applied strain and the Berry curvature reconstruction in the uniaxially strained monolayer MoS2 is explored that leads to the unbalanced Berry curvatures centered at K and -K points and, eventually, the valley magnetization under an external electric field. This is shown to explain a recent experimental observation of the valley magnetoelectric effect and develop a novel concept of the valley magnetic domain (VMD), i.e., a real-space homogeneous distribution of the valley magnetization. A realization of VMD guarantees a sufficient number of stable valley-polarized carriers, one of the most essential prerequisites of the valleytronics. Furthermore, we discover the anomalous electron dynamics through the VMD activation and achieve a manipulation of the anomalous transverse current perpendicular to the electric field, directly accessible to the signal processing [for instance, the current modulation under the VMD (i.e., the VMD wall) moving and the terahertz current rectification under the VMD switching]. This suggests a concept of VMD for use in providing new physical insight into the valleytronic functionality and its manipulation as a key ingredient of potential device applications. © 2019 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/10096
DOI
10.1021/acs.nanolett.9b01676
Publisher
American Chemical Society
Related Researcher
  • Author Lee, JaeDong Light and Matter Theory Laboratory
  • Research Interests Theoretical Condensed Matter Physics; Ultrafast Dynamics and Optics; Nonequilibrium Phenomena
Files:
There are no files associated with this item.
Collection:
Department of Emerging Materials ScienceLight and Matter Theory Laboratory1. Journal Articles


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