Spin and valley waves in Dirac semimetals with population imbalance

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • Russian Acad Sci, Ioffe Physical Technical Institute, Russian Academy of Sciences, St. Petersburg Scientific Centre of the Russian Academy of Sciences, Ioffe Phys Tech Inst

Kuvaus

We find an intervalley wave collective mode in two- and three-dimensional Dirac semimetals in the presence of a valley population imbalance. The dispersion relation of this mode is gapless, proportional to the square of the wave vector at small frequencies, and inversely proportional to the electron-electron exchange interaction energy. The valley wave serves as an energy gain source for the external field, that generates the intervalley transitions. The spin-wave analog is discussed for the case of a semimetal with nonequilibrium spin orientation.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli121402
Sivut1-4
Sivumäärä4
JulkaisuPhysical Review B
Vuosikerta100
Numero12
TilaJulkaistu - 9 syyskuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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