一维Mott-Hubbard绝缘体输运中的自旋-电荷分离和近藤效应
Spin-charge separation and Kondo effect in transport through a 1D Mott-Hubbard insulator
摘要：
我们研究了低能自旋和电荷输运通过一维Mott-Hubbard绝缘体的有限长度$L$连接到费米液体水库，其特征在于不同的化学势的电子相反的自旋极化，因为它发生在量子自旋霍尔绝缘体。我们计算的平均电流（电荷和自旋）和他们的reflectors和演示如何诱导的过渡的水库的低能量费米液体制度的结果在击穿的自旋-电荷分离，这是可见的自旋相关的电压和一个弱的电子散射的存在下，在系统中。这些计算是在哈伯德间隙2 M足够大的假设下进行的：$M > T_L \equiv v_c/L$（$v_c$：导线中的电荷速度）和散射率$Γ_s \ll T_L$。这些结果的关系，近藤点运输在图卢兹限制也澄清。
英文摘要：
We study low energy spin and charge transport through a 1D Mott-Hubbard insulator of finite length $L$ attached to Fermi liquid reservoirs characterized by different chemical potentials for electrons of opposite spin polarizations as it happens in quantum spin Hall insulators. We calculate the average currents (charge and spin) and their correlators and demonstrate how a transition induced by the reservoirs to the low energy Fermi liquid regime results in breakdown of the spin-charge separation, which is visible in the presence of the spin dependent voltages and a weak one electron scattering in the system. These calculations are carried out under assumption that the Hubbard gap 2M is large enough: $M > T_L \equiv v_c/L$ ($v_c$: charge velocity in the wire) and the scattering rate $Γ_s \ll T_L$. Relation of these results to Kondo dot transport in the Toulouse limit is also clarified.
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