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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 朱時宜 | |
| dc.contributor.author | Shih-Han Hung | en |
| dc.contributor.author | 洪士涵 | zh_TW |
| dc.date.accessioned | 2021-06-15T02:22:33Z | - |
| dc.date.available | 2010-08-20 | |
| dc.date.copyright | 2009-08-20 | |
| dc.date.issued | 2009 | |
| dc.date.submitted | 2009-08-18 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/43504 | - |
| dc.description.abstract | 奈米尺度系統的電子傳輸常假設於寬帶極限之下，在此極限下，記憶效應會隨之忽略。在此論文中，我們將Floquet理論應用於奈米尺度系統之電子傳輸，探討在時變外加場之下記憶效應的多光子同調穿隧截止效應。以電極─雙量子點─電極系統為例，電極與量子點之交互作用假設為勞侖茲分佈函數時，探討記憶效應之影響以及多光子同調穿隧截止效應之物理機制。 | zh_TW |
| dc.description.abstract | Electron transport through nanoscale systems are often studied in the wide-band limit without taking the memory effect into consideration. In this thesis, we present a novel Floquet approach in electron transport through nanoscale systems beyond the wide-band limit to explore the multi-photon (MP) coherent destruction of tunneling (CDT) with memory effect in the presence of time-dependent driving field. As a case study, the time-averaged current is calculated in an electrode-double quantum dots-electrode system driven by a periodic field using single Lorentzian spectral density function and a detailed analysis is presented to illustrate the origin of MP-CDT as well as the significance of memory effect. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-15T02:22:33Z (GMT). No. of bitstreams: 1 ntu-98-R96222044-1.pdf: 914051 bytes, checksum: 05ed279465db5d2105a06d345ab6928e (MD5) Previous issue date: 2009 | en |
| dc.description.tableofcontents | 1 Introduction 1
2 Generalized Floquet Formalism and Quasienergy Methods 5 2.1 The Schrodinger Equation with Periodic Hamiltonian 6 2.2 Properties of Floquet Hamiltonian 9 3 Photon-Assisted Transport in nanoscale systems 13 3.1 Tien-Gordon Model 14 3.2 Nonequilibrium Green's Function technique in mesoscopic systems 16 3.2.1 Model Hamiltonian 17 3.2.2 General expression for the current 19 3.3 Equation of motion approach to the electrode-wire-electrode system 22 3.3.1 Charge, current and current noise 24 3.3.2 The Heisenberg equation of motion 27 3.3.3 Lead elimination 30 3.3.4 Wide-Band Limit 38 4 Memory effect in nanoscale systems driven by a periodic field: A generalized Floquet approach 41 4.1 Lorentzian spectral density function 42 4.2 Reformulating equation of propagator using single Lorentzian spectral density model 45 4.3 Multi-photon coherent destruction of tunneling through double quantum dots using single Lorentzian spectral density function 50 5 Summary and perspective 63 A Simple Proof of Floquet Theorem 65 B Contour-ordered Green's function 69 B.1 Time-ordered Green's function 69 B.2 Contour-Ordered Green's Function 71 List of Publications 77 Bibliography 79 | |
| dc.language.iso | en | |
| dc.subject | 奈米尺度系統 | zh_TW |
| dc.subject | 量子點 | zh_TW |
| dc.subject | 記憶效應 | zh_TW |
| dc.subject | 同調穿隧截止 | zh_TW |
| dc.subject | 電子傳輸 | zh_TW |
| dc.subject | memory effect | en |
| dc.subject | coherent destruction of tunneling | en |
| dc.subject | quantum dot | en |
| dc.subject | electron transport | en |
| dc.subject | nanoscale system | en |
| dc.title | 以Floquet理論分析奈米尺度系統的電子傳輸 | zh_TW |
| dc.title | A Generalized Floquet Theory for the Treatment of Electron Transport of Nanoscale Systems | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 97-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 管希聖,高英哲 | |
| dc.subject.keyword | 奈米尺度系統,電子傳輸,量子點,記憶效應,同調穿隧截止, | zh_TW |
| dc.subject.keyword | nanoscale system,electron transport,quantum dot,memory effect,coherent destruction of tunneling, | en |
| dc.relation.page | 86 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2009-08-19 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 物理研究所 | zh_TW |
| 顯示於系所單位： | 物理學系 | |
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