Spin-charge mixing effects on resonant tunneling in a polarized Luttinger Liquid

Details Spin-charge mixing effects on resonant tunneling in a polarized Luttinger Liquid Spin-charge mixing effects on resonant tunneling in a polarized Luttinger Liquid

2004-11-24

arxiv.org/abs/cond-mat/0411600v3

Phys. Rev. B 73, 235326 (2006).

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 4 figures, Sec.I and references largely changed, results for a strong barrier limit added in a new section Sec.IV

Scientific paper

10.1103/PhysRevB.73.235326

We investigate spin-charge mixing effect on resonant tunneling in spin-polarized Tomonaga-Luttinger liquid with double impurities. The mixing arises from Fermi velocity difference between two spin species due to Zeeman effect. Zero bias conductance is calculated as a function of gate voltage $V_{\rm g}$, gate magnetic field $B_{\rm g}$, temperature and magnetic field applied to the system. Mixing effect is shown to cause rotation of the lattice pattern of the conductance peaks in $(V_{\rm g},B_{\rm g})$ plane, which can be observed in experiments. At low temperatures, the contour shapes are classified into three types, reflecting the fact that effective barrier potential is renormalized towards ``perfect reflection'', ``perfect transmission'' and magnetic field induced ``spin-filtering'', respectively.

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