Phase diagram characterized by transmission in a triangular quantum dot

doi:10.1088/1674-1056/27/11/117303

中国物理B ›› 2018, Vol. 27 ›› Issue (11): 117303-117303.doi: 10.1088/1674-1056/27/11/117303

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Phase diagram characterized by transmission in a triangular quantum dot

Jin Huang(黄金), Wei-Zhong Wang(王为忠)

Department of Physics, Wuhan University, Wuhan 430072, China

收稿日期:2018-06-20 修回日期:2018-09-05 出版日期:2018-11-05 发布日期:2018-11-05
通讯作者: Wei-Zhong Wan E-mail:wzwang@whu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11174228 and 10874132).

Phase diagram characterized by transmission in a triangular quantum dot

Jin Huang(黄金), Wei-Zhong Wang(王为忠)

Department of Physics, Wuhan University, Wuhan 430072, China

Received:2018-06-20 Revised:2018-09-05 Online:2018-11-05 Published:2018-11-05
Contact: Wei-Zhong Wan E-mail:wzwang@whu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11174228 and 10874132).

摘要/Abstract

摘要：

We propose a theoretical model to detect the quantum phase transition in a triangular quantum dot molecule with frustration. The boundaries of the phase diagram are accurately determined by the transmission. For small frustration t, as the interdot Coulomb repulsion V increases, the system undergoes a Kosterlitz-Thouless (KT) transition from the Kondo resonance state with a transmission peak at zero energy to the Coulomb blocked state with zero transmission, which is followed by a first transition to the V-induced resonance (VIR) state with unitary transmission. For large frustration t, as V increases, the orbital spin singlet without transmission transits to the VIR state through a KT transition.

关键词: quantum dots, quantum phase transition, Kondo effect, transmission

Abstract:

Key words: quantum dots, quantum phase transition, Kondo effect, transmission

中图分类号: (Electronic transport in nanoscale materials and structures)

73.63.-b

71.27.+a (Strongly correlated electron systems; heavy fermions) 72.15.Qm (Scattering mechanisms and Kondo effect)

黄金, 王为忠. Phase diagram characterized by transmission in a triangular quantum dot[J]. 中国物理B, 2018, 27(11): 117303-117303.

Jin Huang(黄金), Wei-Zhong Wang(王为忠). Phase diagram characterized by transmission in a triangular quantum dot[J]. Chin. Phys. B, 2018, 27(11): 117303-117303.

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Phase diagram characterized by transmission in a triangular quantum dot

Phase diagram characterized by transmission in a triangular quantum dot

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