Zero-bias anomaly in disordered wires.
We calculate the low-energy tunneling density of states nu(epsilon,T) of an N-channel disordered wire, taking into account the electron-electron interaction nonperturbatively. The finite scattering rate 1/tau results in a crossover from the Luttinger liquid behavior at higher energies, nu proportional to epsilon(alpha), to the exponential dependence nu(epsilon,T = 0) proportional to exp(-epsilon*/epsilon) at low energies, where epsilon* proportional to 1/(Ntau). At finite temperature T, the tunneling density of states depends on the energy through the dimensionless variable epsilon/root square[epsilon*T]. At the Fermi level nu(epsilon = 0,T)proportional to exp(-root square[epsilon*/T]).
Mishchenko
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EG
Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974, USA.
Andreev
A V
AV
Glazman
L I
LI