Quantum phase transition and underscreened Kondo effect in electron transport through parallel double quantum dots

被引：11

作者：

Ding, Guo-Hui ^{[1
]}

Ye, Fei ^{[2
]}

Dong, Bing ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China

[2] Tsinghua Univ, Ctr Adv Study, Beijing 100084, Peoples R China

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2009年 / 21卷 / 45期

基金：

中国国家自然科学基金;

关键词：

RENORMALIZATION-GROUP APPROACH; DILUTE MAGNETIC-ALLOYS; ANDERSON MODEL; STATIC PROPERTIES;

D O I：

10.1088/0953-8984/21/45/455303

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We investigate electronic transport through a parallel double quantum dot (DQD) system with strong on-site Coulomb interaction and capacitive interdot coupling. By applying the numerical renormalization group (NRG) method, the ground state of the system and the transmission probability at zero temperature have been obtained. For a system of quantum dots with degenerate energy levels and small interdot tunnel coupling, the spin correlations between the DQDs is ferromagnetic and the ground state of the system is a spin-1 triplet state. The linear conductance will reach the unitary limit (2e(2)/h) due to the underscreened Kondo effect at low temperature. As the interdot tunnel coupling increases, there is a quantum phase transition from ferromagnetic to antiferromagnetic spin correlation in DQDs and the linear conductance is strongly suppressed.

引用

页数：6

共 50 条

[41] Magnetic field effect on the electron transport through a spherical quantum dot [J].

M. K. Shamer .

Indian Journal of Physics, 2019, 93 :583-602

[42] Impact of capacitance and tunneling asymmetries on Coulomb blockade edges and Kondo peaks in nonequilibrium transport through molecular quantum dots [J].

Aligia, A. A. ;

Roura-Bas, P. ;

Florens, Serge .

PHYSICAL REVIEW B, 2015, 92 (03)

[43] Electron transport through the triple quantum dot [J].

Taranko, R. ;

Parafiniuk, P. .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2010, 43 (01) :302-307

[44] Spin polarized Kondo transport through a quantum dot connected to ferromagnetic leads [J].

Lombardo, P. ;

Ezzaidi, Y. ;

Hayn, R. .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2011, 44 (01) :168-171

[45] Nonlocal Andreev transport through a quantum dot in a magnetic field: Interplay between Kondo, Zeeman, and Cooper-pair correlations [J].

Hashimoto, Masashi ;

Yamada, Yasuhiro ;

Tanaka, Yoichi ;

Teratani, Yoshimichi ;

Kemi, Takuro ;

Kawakami, Norio ;

Oguri, Akira .

PHYSICAL REVIEW B, 2024, 109 (03)

[46] Kondo effect in a double quantum-dot molecule under the effect of an electric and magnetic field [J].

Lara, GA ;

Orellana, PA ;

Anda, EV .

SOLID STATE COMMUNICATIONS, 2003, 126 (10) :551-555

[47] RENORMALIZED PERTURBATION APPROACH TO ELECTRON TRANSPORT THROUGH QUANTUM DOT [J].

Hewson, A. C. ;

Oguri, A. ;

Bauer, J. .

PHYSICAL PROPERTIES OF NANOSYSTEMS, 2011, :11-+

[48] First-Order 0-π Quantum Phase Transition in the Kondo Regime of a Superconducting Carbon-Nanotube Quantum Dot [J].

Maurand, Romain ;

Meng, Tobias ;

Bonet, Edgar ;

Florens, Serge ;

Marty, Laetitia ;

Wernsdorfer, Wolfgang .

PHYSICAL REVIEW X, 2012, 2 (01)

[49] Electronic conduction through quantum dots undergoing Jahn-Teller transition [J].

Bose, Shyamalendu M. ;

Ndengeyintwali, Didier ;

Behera, Surjyo N. ;

Nayak, Sanjeev K. ;

Entel, Peter .

PHYSICA B-CONDENSED MATTER, 2014, 434 :129-133

[50] Spin Transport Through Asymmetric Coupled Quantum Dots Between Ferromagnetic Leads [J].

Al Murshidee, Salah A. H. ;

Mohamad, Hadey K. ;

AL-Mukh, Jenan M. .

JOURNAL OF LOW TEMPERATURE PHYSICS, 2024, 217 (3-4) :549-560

← 1 2 3 4 5 →