Kondo-induced electric polarization modulated by magnetic flux through a triangular triple quantum dot

International Conference on Strongly Correlated Electron Systems 2014

Koga, M.^1 ; Matsumoto, M.^2 ; Kusunose, H.^3

Department of Physics, Faculty of Education, Shizuoka University, Shizuoka

422-8529, Japan^1

Department of Physics, Faculty of Science, Shizuoka University, Shizuoka

422-8529, Japan^2

Department of Physics, Ehime University, Matsuyama

790-8577, Japan^3

关键词: Electric polarization;    Oscillation patterns;    Theoretical study;    Triple quantum;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012142/pdf
DOI  :  10.1088/1742-6596/592/1/012142

来源: IOP

【 摘 要 】

The Kondo effect plays an important role in emergence of electric polarization in a triangular triple-quantum-dot system, where one of the three dots is point-contacted with a single lead, and a magnetic flux penetrates through the triangular loop. The Kondo-induced electric polarization exhibits an Aharonov-Bohm type oscillation as a function of the magnetic flux. Our theoretical study shows various oscillation patterns associated with the field-dependent mixing of twofold orbitally degenerate ground states and their sensitivity to the point contact.