Spin and valley waves in Dirac semimetals with population imbalance

A. A. Zyuzin*, A. Yu Zyuzin

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
130 Downloads (Pure)


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.

Original languageEnglish
Article number121402
Pages (from-to)1-4
Number of pages4
JournalPhysical Review B
Issue number12
Publication statusPublished - 9 Sep 2019
MoE publication typeA1 Journal article-refereed


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