Probing Spin-Charge Separation in a Tomonaga-Luttinger Liquid

被引：185

作者：

Jompol, Y. ^{[1
]}

Ford, C. J. B. ^{[1
]}

Griffiths, J. P. ^{[1
]}

Farrer, I. ^{[1
]}

Jones, G. A. C. ^{[1
]}

Anderson, D. ^{[1
]}

Ritchie, D. A. ^{[1
]}

Silk, T. W. ^{[2
]}

Schofield, A. J. ^{[2
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

来源：

SCIENCE | 2009年 / 325卷 / 5940期

基金：

英国工程与自然科学研究理事会;

关键词：

ONE-DIMENSIONAL SRCUO2; QUANTUM WIRES; ELECTRON-GAS; BEHAVIOR;

D O I：

10.1126/science.1171769

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

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 tunneling 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.

引用

页码：597 / 601

页数：5

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