Variable-range hopping and quantum creep in one dimension.
نویسندگان
چکیده
We study the quantum nonlinear response to an applied electric field E of a one-dimensional pinned charge-density wave or Luttinger liquid in the presence of disorder. From an explicit construction of low-lying metastable states and of bounce instanton solutions between them, we demonstrate quantum creep v=e(-c/E(1/2)) as well as a sharp crossover at E=E(*) towards a linear response form consistent with variable-range hopping arguments, but dependent only on electronic degrees of freedom.
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عنوان ژورنال:
- Physical review letters
دوره 91 5 شماره
صفحات -
تاریخ انتشار 2003