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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 |
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Abstract 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.
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Received: 20 June 2018
Revised: 05 September 2018
Accepted manuscript online:
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PACS:
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73.63.-b
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(Electronic transport in nanoscale materials and structures)
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71.27.+a
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(Strongly correlated electron systems; heavy fermions)
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72.15.Qm
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(Scattering mechanisms and Kondo effect)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11174228 and 10874132). |
Corresponding Authors:
Wei-Zhong Wan
E-mail: wzwang@whu.edu.cn
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Cite this article:
Jin Huang(黄金), Wei-Zhong Wang(王为忠) Phase diagram characterized by transmission in a triangular quantum dot 2018 Chin. Phys. B 27 117303
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