电子学报 ›› 2013, Vol. 41 ›› Issue (6): 1056-1059.DOI: 10.3969/j.issn.0372-2112.2013.06.003

• 学术论文 • 上一篇    下一篇

外磁场作用下量子点热机

何济洲, 张艳超, 王秀梅   

  1. 南昌大学物理系, 江西 南昌 330031
  • 收稿日期:2012-03-21 修回日期:2013-01-15 出版日期:2013-06-25
    • 作者简介:
    • 何济洲 男,1962年10月出生于江西东乡.2003年毕业于厦门大学物理系凝聚态物理专业,获理学博士学位.现为南昌大学物理系教授、博导,江西省高校学科带头人.主要从事凝聚态理论、现代热力学理论、统计物理的若干前沿课题和新材料的热学性质、开发应用的研究. E-mail:hjzhou@ncu.edu.cn 张艳超 男,1987年3月出生于内蒙古赤峰市.2011年毕业于南昌大学物理系应用物理专业,获理学学士学位.现为南昌大学凝聚态物理专业在读研究生.主要研究方向为凝聚态理论、现代热力学理论和新材料的热学性质的研究. E-mail:zhangyc1110@qq.com
    • 基金资助:
    • 国家自然科学基金 (No.110650008)

A Quantum Dot Thermoelectric Engine Under the Applied Magnetic Field

HE Ji-zhou, ZHANG Yan-chao, WANG Xiu-mei   

  1. Department of Physics, Nanchang University, Nanchang, Jiangxi 330031, China
  • Received:2012-03-21 Revised:2013-01-15 Online:2013-06-25 Published:2013-06-25
    • Supported by:
    • National Natural Science Foundation of China (No.110650008)

摘要: 量子点热机是由两个温度和化学势都不同的热库与量子点构成的.基于随机主方程,我们推导出电子在两个热库之间传输的粒子流表达式,进一步计算出电子从两个热库中吸收的热量、热机的功率和效率.通过数值模拟可以画出功率与效率的性能特征曲线,分析了外磁场大小对热机性能的影响.最后,讨论了该热机在最大功率下的效率随两库温度比的关系,并与卡诺效率和CA效率比较.

关键词: 单电子隧穿, 量子点热机, 效率, 非平衡和不可逆热力学

Abstract: A quantum dot thermoelectric engine consists of a quantum dot embedded between two thermal reservoirs at different temperatures and chemical potentials.Based on stochastic master equation,the steady expressions for the particle current of tunneling electrons between two reservoirs are derived analytically.Moreover,the amount of heat extracted from the reservoirs per unit time,the power output and the efficiency are calculated.The performance characteristics curves between the power output and the efficiency are plotted by numerical simulation.The influence of the applied magnetic field on the performance characteristics of the engine is analyzed.Lastly,the variation of the corresponding efficiency at the maximum power output with the ratio of the temperatures between two reservoirs is discussed and the corresponding efficiency is compared with Carnot efficiency and CA efficiency.

Key words: single-electron tunneling, quantum dot thermoelectric engine, efficiency, nonequilibrium and irreversible thermodynamics

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