TY - JOUR
T1 - Restricted wiedemann-franz law and vanishing thermoelectric power in one-dimensional conductors
AU - Kuroda, Marcelo A.
AU - Leburton, Jean Pierre
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2008/12/15
Y1 - 2008/12/15
N2 - In one-dimensional conductors with linear E-k dispersion (Dirac systems), intra-branch thermalization is favored by elastic electron-electron interaction in contrast with electron systems with a nonlinear (parabolic) dispersion. We show that under external electric fields or thermal gradients, the carrier populations of different branches, treated as Fermi gases, have different temperatures as a consequence of self-consistent carrier-heat transport. Specifically, in the presence of elastic phonon scattering, the Wiedemann-Franz law is restricted to each branch with its specific temperature. In addition, thermoelectric power vanishes due to electron-hole symmetry, which is validated by experiment.
AB - In one-dimensional conductors with linear E-k dispersion (Dirac systems), intra-branch thermalization is favored by elastic electron-electron interaction in contrast with electron systems with a nonlinear (parabolic) dispersion. We show that under external electric fields or thermal gradients, the carrier populations of different branches, treated as Fermi gases, have different temperatures as a consequence of self-consistent carrier-heat transport. Specifically, in the presence of elastic phonon scattering, the Wiedemann-Franz law is restricted to each branch with its specific temperature. In addition, thermoelectric power vanishes due to electron-hole symmetry, which is validated by experiment.
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U2 - 10.1103/PhysRevLett.101.256805
DO - 10.1103/PhysRevLett.101.256805
M3 - Article
AN - SCOPUS:58149231181
VL - 101
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 25
M1 - 256805
ER -