Quantum dot in a two-dimensional topological insulator: The two-channel Kondo fixed point

K. T. Law; C. Y. Seng; Patrick A. Lee; T. K. Ng

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Quantum dot in a two-dimensional topological insulator: The two-channel Kondo fixed point

机译：二维拓扑绝缘体中的量子点：两通道近藤固定点

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A quantum dot coupled to two helical edge states of a two-dimensional topological insulator through electron tunnelings is studied. We show that if the electron interactions on the edge states are repulsive, with Luttinger liquid parameter K< 1, the system reaches a stable two-channel Kondo fixed point at low temperatures. This is in contrast to the Luttinger liquid leads case in which K< 112 is needed. This two-channel fixed point is described by a boundary sine-Gordon Hamiltonian with a K dependent boundary term. The impurity entropy, the impurity specific heat and the conductance are calculated.

机译：研究了通过电子隧穿耦合到二维拓扑绝缘子的两个螺旋边缘态的量子点。我们表明，如果边缘状态上的电子相互作用是排斥的，则Luttinger液体参数K <1时，系统在低温下会达到稳定的两通道近藤固定点。这与需要K <112的Luttinger液体引线情况相反。该两通道不动点由边界正弦-戈登·哈密顿量描述，其边界依赖于K。计算出杂质熵，杂质比热和电导率。

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来源
《Physical review》 |2010年第4期|041305.1-041305.4|共4页
作者
K. T. Law; C. Y. Seng; Patrick A. Lee; T. K. Ng;
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作者单位

Institute for Advanced Study, Hong Kong University of Science and Technology, Hong Kong, People's Republic of China Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;

rnDepartment of Physics, Hong Kong University of Science and Technology, Hong Kong, People's Republic of China;

rnDepartment of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;

rnDepartment of Physics, Hong Kong University of Science and Technology, Hong Kong, People's Republic of China;

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正文语种 eng
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quantum dots; fermions in reduced dimensions (anyons, composite fermions, luttinger liquid, etc.); scattering mechanisms and kondo effect; electrical injection of spin polarized carriers;

机译：量子点;缩小尺寸的费米子（任意子;复合费米子;吸液剂液体等）;散射机制和近藤效应;自旋极化载流子的电注入;

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1. Kondo effect in a topological insulator quantum dot [J] . Xianhao Xin, Di Zhou Physical review . 2015,第16期

机译：拓扑绝缘子量子点中的近藤效应
2. Flavor fluctuations in three-level quantum dots: Generic SU(3) Kondo fixed point in equilibrium and non-Kondo fixed points in nonequilibrium [J] . Carsten J. Lindner, Fabian B. Kugler, Herbert Schoeller, Physical Review. B, Condensed Matter . 2018,第23期

机译：三级量子点中的风味波动：平衡中的通用SU（3）Kondo定点和非平衡中的非Kondo定点
3. Flavor fluctuation in three-level quantum dots: Generic SU(3) Kondo fixed point in equilibrium and non-Kondo fixed points in noneqilibrium [J] . Lindner Carsten J., Kugler Fabian B., Schoeller Herbert, Physical review, B . 2018,第23期

机译：三级量子点中的风味波动：通用SU（3）kondo固定点在非质核石中的平衡和非kondo固定点
4. The Insulator-Quantum Hall-Insulator Transitions in a Two-Dimensional GaAs System Containing Self-Assembled InAs Quantum Dots [C] . Gil-Ho Kim, C. -T. Liang, C. F. Huang, International Conference on the Physics of Semiconductors . 2005

机译：绝缘体 - 量子霍尔绝缘体在含有自组装INAS量子点的二维GaAs系统中的过渡
5. Unveiling the Topological Quantum Effects in Defect-Engineered Topological Insulator Films [D] . Salehi, Maryam. 2019

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6. Quantum strain sensor with a topological insulator HgTe quantum dot [O] . Marek Korkusinski, Pawel Hawrylak -1

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7. Quantum dot in a two-dimensional topological insulator: The two-channel Kondo fixed point [O] . Law, Kam Tuen, Lee, Patrick A., Seng, C. Y., 2009

机译：二维拓扑绝缘体中的量子点：双通道Kondo固定点

Quantum dot in a two-dimensional topological insulator: The two-channel Kondo fixed point

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