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題 名 | Quantum Transport Through a Quantum Well in the Presence of a Finite-Range Time-Modulated Potential |
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作 者 | Chu,C. S.; Liang,H. C.; | 書刊名 | Chinese Journal of Physics |
卷 期 | 37:5 1999.10[民88.10] |
頁 次 | 頁509-518 |
分類號 | 330 |
關鍵詞 | |
語 文 | 英文(English) |
英文摘要 | We have studied the transport of electrons through a quantum well within which a time-modulated potential of amplitude V��, range a, and frequency w is applied. Our results show that, as the chemical potential μ increases, the dc conductance G exhibits Fano-structures when n is at mfiu> above the bound state energy in the "well. As V�� increases, the Fano-structures are broadened, and higher mhw processes emerge. These features are identified as the formation of quasi-bound states. For a fixed but large potential strength V��= aV��, the Fano-structures are broadened and are shifted toward lower electron energies, as a decreases. The dependence of the Fano-structure to the location of the time- modulated potential is also studied. PACS. 72.10.-d - Theory of electronic transport; scattering mechanisms. PACS. 72.40.+w - Photoconduction and photovoltaic effects. PACS. 73.40.-c - Electronic transport in interface structures. |
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