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Universal conductance in quantum wires in the presence of Umklapp scattering |
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| Authors: | S. Fujimoto N. Kawakami |
| Affiliation: | (1) Department of Physics, Theoretical Physics, University of Oxford, 1 Keble Road, Oxford, OX1 3NP, UK, GB;(2) Department of Physics, Kyoto University, Kyoto 606, Japan, JP;(3) Department of Applied Physics, Osaka University, Suita, Osaka 565, Japan, JP |
| Abstract: | The effects of Umklapp scattering on the zero-temperature conductance in one-dimensional quantum wires are reexamined by taking into account both the screening of external potential and the non-uniform chemical potential shift due to electron-electron interaction. It is shown that in the case away from half-filling the conductance is given by the universal value, 2e 2 /h, even in the presence of Umklapp scattering, owing to these renormalization effects of external potential. The conclusion is in accordance with the recent claim obtained for the system with non-interacting leads being attached to a quantum wire. Received: 5 February 1998 / Received in final form: 16 March 1998 / Accepted: 17 April 1998 |
| Keywords: | PACS. 71.10.Pm Fermions in reduced dimensions (anyons composite fermions Luttinger liquid etc.) - 72.15.Nj Collective modes (e.g. in one-dimensional conductors) - 72.10.Fk Scattering by point defects dislocations surfaces and other imperfections (including Kondo effect) |
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