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arXiv 1002.2782cond-mat.str-elcond-mat.mes-hall
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Tomonaga-Luttinger液体中自旋-电荷分离的研究

Probing spin-charge separation in a Tomonaga-Luttinger liquid

Y. Jompol, C. J. B. Ford, J. P. Griffiths, I. Farrer, G. A. C. Jones, D. Anderson, D. A. Ritchie, T. W. Silk, A. J. Schofield

摘要:

在一维(1D)相互作用的电子系统中,自旋和电荷的激发以不同的速度传播,根据低能量下的Tomonaga-Luttinger液体(TLL)理论。然而,这种自旋-电荷分离的清晰观察是一个持续的实验挑战。我们已经制作了一个静电门控的1D系统中,我们观察到的自旋-电荷分离,也预测到的1D系统中的隧道的幂律抑制。自旋-电荷分离甚至在TLL近似应该保持的低能区之外仍然存在。因此,TLL效应在类似但较短的静电门控导线中也很重要,其中相互作用效应正在全球范围内广泛研究。

英文摘要:

In a one-dimensional (1D) system of interacting electrons, excitations of spin and charge travel at different speeds, according to the theory of a Tomonaga-Luttinger Liquid (TLL) at low energies. However, the clear observation of this spin-charge separation is an ongoing challenge experimentally. We have fabricated an electrostatically-gated 1D system in which we observe spin-charge separation and also the predicted power-law suppression of tunnelling into the 1D system. The spin-charge separation persists even beyond the low-energy regime where the TLL approximation should hold. TLL effects should therefore also be important in similar, but shorter, electrostatically gated wires, where interaction effects are being studied extensively worldwide.

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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