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Coulomb blockade in a quantum wire with long-range Coulomb interactions

Hélène Maurey·Thierry Giamarchi
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Abstract

We study the transport through two impurities or ``barriers'' in a one-dimensional quantum wire, taking into account the long-range $\frac1r$ Coulomb interactions. We compute the temperature-dependent conductance $G(T)$ of this system. Long-range forces lead to a dramatic increase of weak barrier potentials with decreasing temperature, even in the ``resonant'' case. The system thus always reaches a ``strong barrier'' regime in which only charge is pinned, contrary to the standard LL case. $G(T)$ vanishes faster than any power as $T$ goes to zero. In particular, resonant tunneling is suppressed at zero temperature.

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Hélène Maurey, Thierry Giamarchi. 1996-09-01. Coulomb blockade in a quantum wire with long-range Coulomb interactions. https://doi.org/10.1209/epl%2Fi1997-00303-0

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