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arXiv 0811.2330cond-mat.str-el
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有限环中平衡电导的自旋-电荷分离特征

Features of spin-charge separation in the equilibrium conductance through finite rings

Julian Rincon, A. A. Aligia, K. Hallberg

摘要:

我们计算通过环的电导与几个网站$L$描述的$t-J$模型,线程的磁通量$Φ$和弱耦合到两个任意站点的导电引线。该模型可以描述一个圆形阵列的量子点具有较大的充电能量$U$相比,最近邻跳跃$t$。我们确定解析的特定值的$Φ$的透射率的抑郁症是预期的自旋-电荷分离的结果。我们的数值计算表明,在零温度下的平衡电导被压低在这些特定的值的$Φ$为大多数系统,特别是在半填充,这可能是更容易实现的实验。

英文摘要:

We calculate the conductance through rings with few sites $L$ described by the $t-J$ model, threaded by a magnetic flux $Φ$ and weakly coupled to conducting leads at two arbitrary sites. The model can describe a circular array of quantum dots with large charging energy $U$ in comparison with the nearest-neighbor hopping $t$. We determine analytically the particular values of $Φ$ for which a depression of the transmittance is expected as a consequence of spin-charge separation. We show numerically that the equilibrium conductance at zero temperature is depressed at those particular values of $Φ$ for most systems, in particular at half filling, which might be easier to realize experimentally.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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