publication . Preprint . Other literature type . Article . 2017

Anomalous magnon Nernst effect of topological magnonic materials

Xiansi Wang; Xiangrong Wang;
Open Access English
  • Published: 13 Dec 2017
Abstract
The magnon transport driven by thermal gradient in a perpendicularly magnetized honeycomb lattice is studied. The system with the nearest-neighbor pseudodipolar interaction and the next-nearest-neighbor Dzyaloshinskii-Moriya interaction (DMI) has various topologically nontrivial phases. When an in-plane thermal gradient is applied, a transverse in-plane magnon current is generated. This phenomenon is termed as the anomalous magnon Nernst effect that closely resembles the anomalous Nernst effect for an electronic system. The anomalous magnon Nernst coefficient and its sign are determined by the magnon Berry curvatures distribution in the momentum space and magnon...
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Subjects
arXiv: Condensed Matter::Strongly Correlated ElectronsCondensed Matter::OtherCondensed Matter::Materials Science
free text keywords: Condensed Matter - Mesoscale and Nanoscale Physics, Acoustics and Ultrasonics, Electronic, Optical and Magnetic Materials, Surfaces, Coatings and Films, Condensed Matter Physics, Position and momentum space, Nernst effect, symbols.namesake, symbols, Temperature gradient, Physics, Transverse plane, Lattice (order), Magnon, Nernst equation, Berry connection and curvature
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