Alternating-Current Conductivity for a Two-Channel Interacting Quantum Wire

PENG De-Jun; CHENG Fang; ZHOU Guang-Hui

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Alternating-Current Conductivity for a Two-Channel Interacting Quantum Wire

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We investigate theoretically the ac conductivity of a clean two-channel spinless quantum wire in the presence of both short-ranged intra- and inter-channel electron-electron interactions. In the Luttinger-liquid regime, we formulize the action functional of the system with an external time-varying electric field. The obtained expression of ac conductivity for the system within linear response theory is generally an oscillation function of the interaction strength, the driving frequency as well as the measured position in the wire. The numerical examples demonstrate that the amplitude of ac conductivity is renormalized by the both interactions, and the dc conductivity of the system with inter-channel interaction is smaller than that without inter-channel interaction.

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《中国物理快报：英文版》 |2007年第2期|520-523|共4页
作者
PENG De-Jun; CHENG Fang; ZHOU Guang-Hui;
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Department of Physics, Hunan Normal University, Changsha 410081;

Department of Physics, Hunan Normal University, Changsha 410081;

Department of Physics, Hunan Normal University, Changsha 410081;

International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015;

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中图分类物理学;
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Alternating-Current Conductivity for a Two-Channel Interacting Quantum Wire

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