Heat capacity of nonequilibrium electron-hole plasma in graphene layers and graphene bilayers

V. Ryzhii, M. Ryzhii, T. Otsuji, V. Mitin, M. S. Shur

Research output: Contribution to journalArticlepeer-review

Abstract

We analyze the statistical characteristics of quasinonequilibrium two-dimensional electron-hole plasmas in graphene layers (GLs) and graphene bilayers (GBLs) and evaluate their heat capacity. The GL heat capacity of the weakly pumped intrinsic or weakly doped GLs normalized by the Boltzmann constant is equal to cGL≃6.58. With varying carrier temperature the intrinsic GBL carrier heat capacity cGBL changes from cGBL≃2.37 at T 300 K to cGBL≃6.58 at elevated temperatures. These values are markedly different from the heat capacity of classical two-dimensional carriers with c=1. The obtained results can be useful for the optimization of different GL- and GBL-based high-speed devices.

Original languageEnglish
Article number245414
JournalPhysical Review B
Volume103
Issue number24
DOIs
Publication statusPublished - 2021 Jun 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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