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Dynamical Transport Property through an Interacting Quantum Wire |
| CHENG Fang1;ZHOU Guang-Hui1,2 |
| 1Department of Physics, Hu’nan Normal University, Changsha 410081
2International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015 |
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| Cite this article: |
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CHENG Fang, ZHOU Guang-Hui 2005 Chin. Phys. Lett. 22 2039-2042 |
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Abstract Using the equation of motion, we investigate theoretically the dynamical ac conductance of a clean Luttinger-liquid quantum wire adiabatically coupled to Fermi liquid electron reservoirs in the presence of short-ranged electron-electron interactions. For a perfect single mode quantum wire, in the limit of zero-ranged interaction we conclude that the static dc conductance of ω→0 is e2/h, which is independent of the electron interactions. While in the dynamical case of ω≠0, the ac conductance oscillates with the amplitude e2/h and the period which depends on the interaction strength and the driving frequency as well as the position in the wire.
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| Keywords:
73.23.-b
73.21.Hb
78.67.Lt
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Published: 01 August 2005
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