Probing spin-charge separation in a Tomonaga-Luttinger liquid

Autor:	Jompol, Y., Ford, C. J. B., Griffiths, J. P., Farrer, I., Jones, G. A. C., Anderson, D., Ritchie, D. A., Silk, T. W., Schofield, A. J.
Rok vydání:	2010
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Science 325 (2009) 597-601
Druh dokumentu:	Working Paper
DOI:	10.1126/science.1171769
Popis:	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. Comment: 11 pages, 4 PDF figures, uses scicite.sty, Science.bst
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1002.2782 Zobrazit plný text záznamu Plný text ve formátu PDF