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In this article, we review recent work about time dependent quantum transport through a quantum dot in Kondo regime. This represents a major step towards designing next generation transistors that are expected to replace current MOSFET's in…

介观与纳米尺度物理 · 物理学 2013-03-13 Ali Goker , Elif Gedik

We invoke the time-dependent non-crossing approximation in order to study the effects of the density of states of gold contacts on the instantaneous conductance of a single electron transistor which is abruply moved into the Kondo regime by…

材料科学 · 物理学 2015-05-20 Ali Goker , Zhiyong Zhu , Udo Schwingenschlogl , Aurelien Manchon

We consider the time-dependent electron transport through a quantum dot connected to multiple leads in the presence of the additional over-dot (bridge) tunnelling channels by using the evolution operator technique. Each terminal and quantum…

介观与纳米尺度物理 · 物理学 2007-06-13 R. Taranko , T. Kwapinski , E. Taranko

Using exact-diagonalization techniques supplemented by a Dyson equation embedding procedure, the transport properties of multilevel quantum dots are investigated in the Kondo regime. The conductance can be decomposed into the contributions…

介观与纳米尺度物理 · 物理学 2009-11-10 C. A. Büsser , G. B. Martins , K. A. Al-Hassanieh , Adriana Moreo , Elbio Dagotto

The time-dependent non-crossing approximation is used to study the transient current in a single electron transistor attached asymmetrically to two leads following a sudden change in the energy of the dot level. We show that for asymmetric…

强关联电子 · 物理学 2015-05-13 A. Goker , B. A. Friedman , P. Nordlander

We investigate the time evolution of the thermopower in a vibrating quantum dot suddenly shifted into the Kondo regime via a gate voltage by adopting the time-dependent non-crossing approximation and linear response Onsager relations.…

强关联电子 · 物理学 2015-06-05 Ali Goker , Berna Uyanik

We develop a theory of electron transport in a double quantum dot device recently proposed for the observation of the two-channel Kondo effect. Our theory provides a strategy for tuning the device to the non-Fermi-liquid fixed point, which…

介观与纳米尺度物理 · 物理学 2007-05-23 M. Pustilnik , L. Borda , L. I. Glazman , J. von Delft

We employ the time-dependent non-crossing approximation to investigate the joint effect of strong electron-electron and electron-phonon interaction on the instantaneous conductance of a single molecule transistor which is abruply moved into…

强关联电子 · 物理学 2010-10-19 Ali Goker

The transport properties of nanostructured systems are deeply affected by the geometry of the effective connections to metallic leads. In this work we derive a conductance expression for interacting systems whose connectivity geometries do…

介观与纳米尺度物理 · 物理学 2017-09-15 Luis G. G. V. Dias da Silva , Caio H. Lewenkopf , Edson Vernek , Gerson J. Ferreira , Sergio E. Ulloa

We present a novel pairing mechanism for superconductivity in strongly correlated electron systems, which often have both localised and itinerant charge carriers. An effective anisotropic interaction between the itinerant particles…

强关联电子 · 物理学 2025-12-03 M. A. Zeb

Distributions of electron waiting times have been measured in several recent experiments and have been shown to provide complementary information compared to what can be learned from the electric current fluctuations. Existing theories,…

介观与纳米尺度物理 · 物理学 2021-08-26 Philipp Stegmann , Björn Sothmann , Jürgen König , Christian Flindt

We consider charge fluctuations in a quantum dot coupled to an interacting one-dimensional electron liquid. We find the behavior of this system to be similar to the multichannel pseudogap Kondo model. By tuning the coupling between the dot…

强关联电子 · 物理学 2007-05-23 Eugene H. Kim , Yong Baek Kim , C. Kallin

We study the Kondo effect in the electron transport through a quantum dot coupled to ferromagnetic leads, using a real-time diagrammatic technique which provides a systematic description of the nonequilibrium dynamics of a system with…

介观与纳米尺度物理 · 物理学 2007-05-23 Yasuhiro Utsumi , Jan Martinek , Gerd Schön , Hiroshi Imamura , Sadamichi Maekawa

We present a theoretical study of the electronic transport through a many-level quantum dot driven by time-dependent signals applied at the contacts to the leads. If the barriers oscillate out of phase the system operates like a turnstile…

介观与纳米尺度物理 · 物理学 2009-11-13 Valeriu Moldoveanu , Vidar Gudmundsson , Andrei Manolescu

We analyze the time-evolution of a quantum dot which is proximized by a large-gap superconductor and weakly probed using the charge and heat currents into a wide-band metal electrode. We map out the full time dependence of these currents…

介观与纳米尺度物理 · 物理学 2023-05-23 Lara C. Ortmanns , Janine Splettstoesser , Maarten R. Wegewijs

Current fluctuations can provide additional insight into quantum transport in mesoscopic systems. The present work is carried out for the fluctuation properties of transport through a pair of coupled quantum dots which are connected with…

介观与纳米尺度物理 · 物理学 2009-09-02 JunYan Luo , Xin-Qi Li , YiJing Yan

The transmission phase through a quantum dot with few electrons shows a complex, non-universal behavior. Here we combine configuration-interaction calculations ---treating rigorously Coulomb interaction--- and the Friedel sum rule to…

介观与纳米尺度物理 · 物理学 2010-07-22 Massimo Rontani

We study the nonequilibrium spin transport through a quantum dot containing two spin levels coupled to the magnetic electrodes. A formula for the spin-dependent current is obtained and is applied to discuss the linear conductance and…

介观与纳米尺度物理 · 物理学 2009-11-07 Ping Zhang , Qi-Kun Xue , Yu-Peng Wang , X. C. Xie

Using the time-dependent non-crossing approximation, we calculate the transient response of the current through a quantum dot subject to a finite bias when the dot level is moved suddenly into a regime where the Kondo effect is present.…

强关联电子 · 物理学 2009-11-10 Martin Plihal , David C. Langreth , Peter Nordlander

The linear transport properties of a model molecular transistor with electron-electron and electron-phonon interactions were investigated analytically and numerically. The model takes into account phonon modulation of the electronic energy…

介观与纳米尺度物理 · 物理学 2007-05-23 P. S. Cornaglia , D. R. Grempel , H. Ness
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