Fate of 1D spin-charge separation away from Fermi points.
نویسندگان
چکیده
We consider the dynamic response functions of interacting one dimensional spin-1/2 fermions at arbitrary momenta. We build a nonperturbative zero-temperature theory of the threshold singularities using mobile impurity Hamiltonians. The interaction induced low-energy spin-charge separation and power-law threshold singularities survive away from Fermi points. We express the threshold exponents in terms of the spinon spectrum.
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عنوان ژورنال:
- Physical review letters
دوره 104 11 شماره
صفحات -
تاریخ انتشار 2010