TY - JOUR
T1 - Phonon Emission from a 2D electron gas
T2 - Evidence of transition to the hydrodynamic regime
AU - Chow, Edmond
AU - Wei, H. P.
AU - Girvin, S. M.
AU - Shayegan, M.
PY - 1996
Y1 - 1996
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.77.1143
DO - 10.1103/PhysRevLett.77.1143
M3 - Article
C2 - 10063001
AN - SCOPUS:4243749593
SN - 0031-9007
VL - 77
SP - 1143
EP - 1146
JO - Physical review letters
JF - Physical review letters
IS - 6
ER -