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We report the observation of Coulomb blockade in a quantum dot contacted by two quantum point contacts each with a single fully-transmitting mode, a system previously thought to be well described without invoking Coulomb interactions. At…

介观与纳米尺度物理 · 物理学 2012-04-06 S. Amasha , I. G. Rau , M. Grobis , R. M. Potok , H. Shtrikman , D. Goldhaber-Gordon

We study conductance through a quantum dot under Coulomb blockade conditions in the presence of an external periodic perturbation. The stationary state is determined by the balance between the heating of the dot electrons by the…

介观与纳米尺度物理 · 物理学 2015-06-24 D. M. Basko , V. E. Kravtsov

We study the Coulomb blockade of tunneling through a double quantum dot. The temperature dependence of the linear conductance is strongly affected by the inter-dot tunneling. As the tunneling grows, a crossover from temperature-independent…

凝聚态物理 · 物理学 2009-10-28 K. A. Matveev , L. I. Glazman , H. U. Baranger

We consider Coulomb blockade oscillations of thermoelectric coefficients of a single electron transistor based on a quantum dot strongly coupled to one of the leads. Analytic expression for the thermopower as a function of temperature $T$…

介观与纳米尺度物理 · 物理学 2009-10-31 A. V. Andreev , K. A. Matveev

We present a theory of Coulomb blockade oscillations in tunneling through a pair of quantum dots connected by a tunable tunneling junction. The positions and amplitudes of peaks in the linear conductance are directly related, respectively,…

凝聚态物理 · 物理学 2009-10-28 K. A. Matveev , L. I. Glazman , H. U. Baranger

We review the quantum interference effects in a system of interacting electrons confined to a quantum dot. The review starts with a description of an isolated quantum dot. We discuss the status of the Random Matrix theory (RMT) of the…

介观与纳米尺度物理 · 物理学 2009-11-07 I. L. Aleiner , P. W. Brouwer , L. I. Glazman

We extend the theory of Coulomb blockade oscillations to quantum dots which are deformed by the confining potential. We show that shape deformations can generate sequences of conductance resonances which carry the same internal…

介观与纳米尺度物理 · 物理学 2009-10-30 G. Hackenbroich , W. D. Heiss , H. A. Weidenmueller

The conductance through a quantum wire of cylindrical cross section and a weak bulge is solved exactly for two electrons within the Landauer-Buettiker formalism. We show that this 'open' quantum dot exhibits spin-dependent Coulomb blockade…

介观与纳米尺度物理 · 物理学 2009-10-31 T. Rejec , A. Ramsak , J. H. Jefferson

We study the transport through a quantum dot coupled to two leads by single-mode point contacts. The linear conductance is calculated analytically as a function of a gate voltage and temperature T in the case when transmission coefficients…

凝聚态物理 · 物理学 2009-10-28 A. Furusaki , K. A. Matveev

We study theoretically a quantum dot in the quantum Hall regime that is strongly coupled to a single lead via a point contact. We find that even when the transmission through the point contact is perfect, important features of the Coulomb…

凝聚态物理 · 物理学 2009-10-28 Hangmo Yi , C. L. Kane

We study the interplay between Coulomb blockade and the Kondo effect in quantum dots. We use a self-consistent scheme which describes mesoscopic devices in terms of a collective phase variable (slave rotor) and quasiparticle degrees of…

介观与纳米尺度物理 · 物理学 2009-11-10 S. Florens , P. San Jose , F. Guinea , A. Georges

We consider an interacting quantum dot working as a coherent source of single electrons. The dot is tunnel coupled to a reservoir and capacitively coupled to a gate terminal with an applied ac potential. At low frequencies, this is the…

介观与纳米尺度物理 · 物理学 2016-10-24 M. I. Alomar , Jong Soo Lim , David Sánchez

Coulomb blockade (CB) in a quantum dot (QD) with one anomalously broad level is considered. In this case many consecutive pronounced CB peaks correspond to occupation of one and the same broad level. Between the peaks the electron jumps…

介观与纳米尺度物理 · 物理学 2007-05-23 P. G. Silvestrov , Y. Imry

The rate-equation approach is used to describe sequential tunneling through a molecular junction in the Coulomb blockade regime. Such device is composed of molecular quantum dot (with discrete energy levels) coupled with two metallic…

介观与纳米尺度物理 · 物理学 2009-11-11 Kamil Walczak

We consider a `quantum dot' in the Coulomb blockade regime, subject to an arbitrarily large source-drain voltage V. When V is small, quantum dots with odd electron occupation display the Kondo effect, giving rise to enhanced conductance.…

介观与纳米尺度物理 · 物理学 2009-11-07 P. Coleman , C. Hooley , Y. Avishai , Y. Goldin , A. F. Ho

We consider a tunnel junction formed between a fixed electrode and an oscillating one. Accumulation of the charge on the junction capacitor induces a force on the nano-mechanical oscillator. The junction is voltage biased and connected in…

介观与纳米尺度物理 · 物理学 2009-02-06 N. Pauget , F. Pistolesi , M. Houzet

We report transport measurements on a semiconductor quantum dot with a small number of confined electrons. In the Coulomb blockade regime, conduction is dominated by cotunneling processes. These can be either elastic or inelastic, depending…

介观与纳米尺度物理 · 物理学 2009-10-31 S. De Franceschi , S. Sasaki , J. M. Elzerman , W. G. van der Wiel , S. Tarucha , L. P. Kouwenhoven

Tunneling of electrons traversing a few-electron quantum dot is strongly influenced by the Coulomb interaction leading to Coulomb blockade effects and single-electron tunneling. We present calculations which demonstrate that correlations…

凝聚态物理 · 物理学 2009-10-28 Daniela Pfannkuche , Sergio E. Ulloa

We investigate the effect of a quantised vibrational mode on electron tunneling through a chain of three quantum dots. The outer dots are coupled to voltage leads, but the position of the central dot is not rigidly fixed. Motion of the…

介观与纳米尺度物理 · 物理学 2009-11-07 A. D. Armour , A. MacKinnon

Transport measurements at cryogenic temperatures through a few electron top gated quantum dot fabricated in a silicon/silicon-germanium heterostructure are reported. Variations in gate voltage induce a transition from an isolated dot toward…

介观与纳米尺度物理 · 物理学 2007-05-23 Levente J. Klein , Donald E. Savage , Mark A. Eriksson
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