| 研究生: |
王增彥 Tseng-Yen Wang |
|---|---|
| 論文名稱: |
五個串接耦合量子點之熱電特性與不同量子點數之系統比較 Thermoelectric effects of serially coupled five quantum dots connected to metallic electrodes |
| 指導教授: | 郭明庭 |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 物理學系 Department of Physics |
| 論文出版年: | 2014 |
| 畢業學年度: | 102 |
| 語文別: | 中文 |
| 論文頁數: | 76 |
| 中文關鍵詞: | 量子點 、熱電 |
| 相關次數: | 點閱:7 下載:0 |
| 分享至: |
| 查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
本論文利用Anderson模型來研究五個串接耦合量子點的系統,並利用凱帝旭格林函數來計算系統的電流,進而算出多體理論線性響應區下系統的電導、Seebeck coefficient、Power factor,透過理論模擬出量子點size fluctuation與position fluctuation以及電極與量子點間tunneling rate對Power factor的影響。我們透過調變鄰近量子點的能階來觀察系統的行為發現long distance coherent tunneling的現象。最後討論系統量子點的數量對熱電係數的效應。
The thermoelectric properties of coupled five quantum dots (QDs) connected to metallic electrodes are theoretically studied by using the multi-levels of Anderson model. For simplicity, the electrical conductance, Seebeck coefficient and power factor of multiple QDs junction system are calculated in the absence of electron Coulomb interactions. The effects of QD size and position fluctuation on the thermoelectric properties of QD junction system are discussed and analyzed on the basis of long distance coherent tunneling. The thermoelectric behavior of five QDs is similar to that of N=3 in a certain condition.
[1] E. Velmre, Thomas Johann Seebeck and his contribution to the modern science and technology, Electronics Conference(BEC), 2010 12th Biennial Baltic, Tallinn(2010).
[2] J. C. Peltier, Nouvelles experiences sur la caloriecete des courans electriques. Ann. Chem., LVI, pp.371-387,(1834).
[3] D. M. Rowe, Thermoelectrics Handbook: Macro to Nano, (CRC press, New York, 2006).
[4] A. F. Ioffe, Semiconductor thermoelements, and Thermoelectric cooling, (Infosearch Limited, London, 1957).
[5] H. J. Goldsmid, R. W. Douglas, The use of semiconductors in thermoelectric refrigeration, Br. J. Appl. Phys. 5, 386(1954).
[6] H. J. Goldsmid, A. R. Sheard, and D. A. Wright, The performance of bismuth telluride thermojunctions, Br. J. Appl. Phys. 9, 365(1958).
[7] L. D. Hicks and M. S. Dresselhaus, Thermoelectric figure of merit of a one-dimensional conductors, Phys. Rev. B 47, 16631(1993).
[8] L. D. Hicks and M. S. Dresselhaus, Effect of quantum-well structures on the thermoelectric figure of merit, Phys. Rev. B 47, 12727(1993).
[9] L. D. Hicks, T. C. Harman, X. Sun, and M. S. Dresselhaus, Experimental study of the effect of quantum-well structures on the thermoelectric figure of merit, Phys. Rev. B 53, R10493(1996).
[10] R. Venkatasubramanian, E. Siivola, T. Colpitts, and B. O’Quinn, Thin-film thermoelectric devices with high room temperature figure of merit Nature. 413, 597(2001).
[11] D. M. T. Kuo and Y.-C. Chang, Thermoelectric and thermal rectification properties of quantum dot junctions, Phys. Rev. B 81, 205321(2010).
[12] R. Franco, J. Silva Valencia, and M. S. Figueira, Thermopower and thermal conductance through parallel coupled quantum dots,” J. Appl. Phys. 103, 07B726(2008).
[13] Q. Wang, H.-Q. Xie, Y.-H. Nie, and W. Ren, Enhancement of thermoelectric efficiency in triple quantum dots by the Dicke effect, Phys. Rev. B 87, 075102(2013).
[14] A. Yadav, K. P. Pipe, W. Ye, and R. S. Goldman, Thermoelectric properties of quantum dot chains, J. Appl. Phys. 105, 093711(2009).
[15] Y.-M. Lin and M. S. Dresselhaus, Thermoelectric properties of superlattice nanowires, Phys. Rev. B 68, 075304(2003).
[16] D. M. T. Kuo and Y.-C. Chang, Effect of interdot hopping and Coulomb blockade on the thermoelectric properties of serially coupled quantum dots, Nanoscale. Res. Lett. 7,257(2012).
[17] D. M. T. Kuo and Y.-C. Chang, Tunneling current Spectroscopy of a Nanostructure Junction Involving Multiple Energy Levels, Phys. Rev. Lett. 99, 086803(2007).
[18] Y. Meir and N. S. Wingreen, Landauer formula for the current through an interacting electron region, Phys. Rev. Lett. 68, 2512(1992).
[19] D. M. T. Kuo and Y.-C. Chang, Multi-peak negative differential resistance device consisting of multiple quantum dots sandwiched between two metallic electrodes, Physica. E 41,395(2009)
[20] D. M. T. Kuo and Y.-C. Chang, Long distance coherent tunneling effect on the charge and heat currents in serially coupled triple quantum dots, Phys. Rev. B 89, 115416(2014).
[21] D. M. T. Kuo and Y.-C. Chang, Thermoelectric properties of a quantum dot array connected to metallic electrodes Nanotechnology. 24, 175403(2013).