Dynamic electron transport theory for multiprobe mesoscopic structures
Using the linear response theory and random phase approximation, we develop a general dynamic electron transport theory for multiprobe mesoscopic structures in an arbitrarily time-dependent external field. In this case, the responses of the dynamic current, charge and internal potential to the exter...
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Veröffentlicht in: | Chinese physics B 2011-07, Vol.20 (7), p.373-379, Article 077201 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Using the linear response theory and random phase approximation, we develop a general dynamic electron transport theory for multiprobe mesoscopic structures in an arbitrarily time-dependent external field. In this case, the responses of the dynamic current, charge and internal potential to the external fields can be determined self-consistently. Without loss of generality, charge (current) conservation and gauge invariance under a potential shift are satisfied. As an example, we employ a quantum wire with a single barrier to discuss the response of the internal potential. |
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ISSN: | 1674-1056 2058-3834 |
DOI: | 10.1088/1674-1056/20/7/077201 |