%0 Journal Article
%@ 0031-9007
%A Chiatti, O
%A Nicholls, JT
%A Proskuryakov, YY
%A Lumpkin, N
%A Farrer, I
%A Ritchie, DA
%D 2006
%F discovery:20434
%I AMERICAN PHYSICAL SOC
%J Physical Review Letters
%K POINT CONTACTS, GAS, QUANTIZATION, TRANSPORT
%N 5
%P 056601-1
%T Quantum thermal conductance of electrons in a one-dimensional wire
%U https://discovery.ucl.ac.uk/id/eprint/20434/
%V 97
%X 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.
%Z © 2006 The American Physical Society