Phonon Emission from a 2D electron gas: Evidence of transition to the hydrodynamic regime

Edmond Chow, H. P. Wei, S. M. Girvin, M. Shayegan

Research output: Contribution to journalArticle

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Abstract

Using as a thermometer the temperature dependent magnetotransport of a two-dimensional electron gas, we find that the effective temperature scales with current as [Formula presented] in the Shubnikov-de Haas regime, and [Formula presented] at the critical points between adjacent quantum Hall plateaus, both integer and fractional. This implies the phonon energy emission rate changes from the expected [Formula presented]. We explain this, as well as the dramatic enhancement in phonon emission efficiency using a hydrodynamic model.

Original languageEnglish (US)
Pages (from-to)1143-1146
Number of pages4
JournalPhysical review letters
Volume77
Issue number6
DOIs
StatePublished - Jan 1 1996

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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