TY  - JOUR
KW  - POINT CONTACTS
KW  -  GAS
KW  -  QUANTIZATION
KW  -  TRANSPORT
SP  - 056601
N2  - We use an electron thermometer to measure the temperature rise of approximately 2x10(5) electrons in a two-dimensional box, due to heat flow into the box through a ballistic one-dimensional (1D) constriction. Using a simple model we deduce the thermal conductance kappa(V-g) of the 1D constriction, which we compare to its electrical conductance characteristics; for the first four 1D subbands the heat carried by the electrons passing through the wire is proportional to its electrical conductance G(V-g). In the vicinity of the 0.7 structure this proportionality breaks down, and a plateau at the quantum of thermal conductance pi(2)k(B)(2)T/3h is observed.
N1  - © 2006 The American Physical Society
UR  - http://dx.doi.org/10.1103/PhysRevLett.97.056601
AV  - public
VL  - 97
EP  - 1
ID  - discovery20434
IS  - 5
TI  - Quantum thermal conductance of electrons in a one-dimensional wire
PB  - AMERICAN PHYSICAL SOC
Y1  - 2006/08/04/
A1  - Chiatti, O
A1  - Nicholls, JT
A1  - Proskuryakov, YY
A1  - Lumpkin, N
A1  - Farrer, I
A1  - Ritchie, DA
SN  - 0031-9007
JF  - Physical Review Letters
ER  -