Cavaliere F, Braggio A, Stockburger J T, Sassetti M, Kramer B
Dipartimento di Fisica, INFM-Lamia, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy.
Phys Rev Lett. 2004 Jul 16;93(3):036803. doi: 10.1103/PhysRevLett.93.036803. Epub 2004 Jul 13.
Spin-charge states of correlated electrons in a one-dimensional quantum dot attached to interacting leads are studied in the nonlinear transport regime. With nonsymmetric tunnel barriers, regions of negative differential conductance induced by spin-charge separation are found. They are due to a correlation-induced trapping of higher-spin states without magnetic field and are associated with a strong increase in the fluctuations of the electron spin.
研究了连接到相互作用引线的一维量子点中关联电子的自旋-电荷态在非线性输运 regime 下的情况。在非对称隧道势垒的情况下,发现了由自旋-电荷分离引起的负微分电导区域。它们是由于在没有磁场的情况下,关联诱导的高自旋态的俘获,并且与电子自旋涨落的强烈增加有关。