Nonequilibrium transport through parallel double quantum dots in the Kondo regime
نویسندگان
چکیده
منابع مشابه
Quantum phase transition and underscreened Kondo effect in electron transport through parallel double quantum dots.
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 i...
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We study the transmission through a double quantum-dot system in the Kondo regime. An exact expression for the transmission coefficient in terms of fully interacting many-body Green’s functions is obtained. By mapping the system into an effective Anderson impurity model, one can determine the transmission using numerical renormalization-group methods. The transmission exhibits signatures of the...
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Rosa López,1 Ramón Aguado,1,2 Gloria Platero,1 and Carlos Tejedor3 1Teorı́a de la Materia Condensada, Instituto de Ciencia de Materiales (CSIC) Cantoblanco, 28049 Madrid, Spain 2Department of Applied Physics, Delft University of Technology, Lorentzweg 1, 2628CJ, Delft, The Netherlands 3Fı́sica Teórica de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain (Rece...
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The spin-polarized transport through two-level quantum dots weakly coupled to ferromagnetic leads is considered theoretically in the Coulomb blockade regime. It is assumed that the dot is doubly occupied, so that the current flows due to cotunneling through singlet and triplet states of the dot. It is shown that, by sweeping the bias voltage, one can induce a singlet–triplet transition, which d...
متن کاملNonequilibrium transport through double quantum dots: exact results near a quantum critical point.
While violations of the Fermi liquid paradigm for metals are of great interest in various physical systems, quantum impurity models are among the few cases where exact theoretical results are available. Double quantum dots can provide an experimental realization of the 2 impurity Kondo model which exhibits a non-Fermi-liquid quantum critical point at a special value of its parameters. We presen...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2005
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.72.235308