Coulomb blockade in a quantum wire with long-range interactions
نویسندگان
چکیده
We study the transport through two impurities or “barriers” in a onedimensional quantum wire, taking into account the long-range 1r Coulomb interactions. We compute the temperature-dependent conductance G(T ) of this system both for weak and strong barriers. 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 G(T ) vanishes faster than any power as T goes to zero. In particular, resonant tunneling is suppressed at zero temperature. Typeset using REVTEX
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تاریخ انتشار 1996