Adiabatic charge pumping through quantum dots in the Coulomb blockade regime

2009 ◽  
Vol 80 (11) ◽  
Author(s):  
A. R. Hernández ◽  
F. A. Pinheiro ◽  
C. H. Lewenkopf ◽  
E. R. Mucciolo
Keyword(s):  
Quantum Dots ◽  
Coulomb Blockade ◽  
Charge Pumping ◽  
Coulomb Blockade Regime

ANTI-RESONANCES OF TUNNELING THROUGH A QUANTUM WIRE WITH SIDE-COUPLED QUANTUM DOTS

2001 ◽  
Vol 15 (31) ◽  
pp. 4111-4121 ◽  
Author(s):  
JIN-FU FENG ◽  
SHI-JIE XIONG
Keyword(s):  
Quantum Dots ◽  
Single Particle ◽  
Low Temperatures ◽  
Quantum Wire ◽  
Coulomb Blockade ◽  
Destructive Interference ◽  
Channel Network ◽  
Coupled Quantum Dots ◽  
Coulomb Blockade Regime ◽  
Simple Summation

We study the transport properties of electrons in a quantum wire with side-coupled quantum dots in Coulomb blockade regime by the use of the equivalent single-particle multi-channel network and Landauer formula. At low temperatures the calculated dependence of the conductance on the gate voltage of dots exhibits two dips, indicating the destructive interference of the wave directly transmitted through the wire and the wave reflected from the dots. In a wire with more than one side-coupled dots the suppression of conductance is a simple summation of the effects of scattering of all the dots. The possibility of fabricating tunable switch devices by using such structures is discussed.

scholarly journals Deformation of Quantum Dots in the Coulomb Blockade Regime

1997 ◽  
Vol 79 (1) ◽  
pp. 127-130 ◽  
Author(s):  
G. Hackenbroich ◽  
W. D. Heiss ◽  
H. A. Weidenmüller
Keyword(s):  
Quantum Dots ◽  
Coulomb Blockade ◽  
Coulomb Blockade Regime

Coupling Characteristics of Semiconductor Coupled Quantum Dots in Coulomb Blockade Regime

1998 ◽  
Vol 37 (Part 1, No. 12B) ◽  
pp. 7161-7164 ◽  
Author(s):  
Koji Ishibashi ◽  
Tjerk H. Oosterkamp ◽  
Remko V. Hijman ◽  
Leo P. Kouwenhoven
Keyword(s):  
Quantum Dots ◽  
Coulomb Blockade ◽  
Coupled Quantum Dots ◽  
Coupling Characteristics ◽  
Coulomb Blockade Regime

scholarly journals Ultrasensitive Photoresponse of Graphene Quantum Dots in the Coulomb Blockade Regime to THz Radiation

Nano Letters ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 5408-5414
Author(s):  
Elisa Riccardi ◽  
Sylvain Massabeau ◽  
Federico Valmorra ◽  
Simon Messelot ◽  
Michael Rosticher ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Coulomb Blockade ◽  
Graphene Quantum Dots ◽  
Thz Radiation ◽  
Coulomb Blockade Regime

scholarly journals Coulomb blockade in molecular quantum dots

Open Physics ◽  
2006 ◽  
Vol 4 (1) ◽  
pp. 8-19 ◽  
Author(s):  
Kamil Walczak
Keyword(s):  
Quantum Dots ◽  
Coulomb Blockade ◽  
Energy Levels ◽  
Nonlinear Transport ◽  
Discrete Energy ◽  
Rectification Effect ◽  
Current Voltage ◽  
Self Consistent Field ◽  
Current Steps ◽  
Coulomb Blockade Regime

AbstractThe 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 electrodes via potential barriers. Based on this model, we calculate nonlinear transport characteristics (conductance-voltage and current-voltage dependences) and compare them with the results obtained within a self-consistent field approach. It is shown that the shape of transport characteristics is determined by the combined effect of the electronic structure of molecular quantum dots and by the Coulomb blockade. In particular, the following phenomena are discussed in detail: the suppression of the current at higher voltages, the charging-induced rectification effect, the charging-generated changes of conductance gap and the temperature-induced as well as broadening-generated smoothing of current steps.

CONDUCTANCE FLUCTUATIONS IN THE COULOMB BLOCKADE REGIME

1999 ◽  
Vol 13 (32) ◽  
pp. 3841-3854 ◽  
Author(s):  
RICHARD BERKOVITS
Keyword(s):  
Quantum Dots ◽  
Ground State ◽  
Coulomb Blockade ◽  
Electron System ◽  
Low Density ◽  
Weakly Coupled ◽  
Conductance Fluctuations ◽  
Spin Polarized ◽  
Coulomb Blockade Regime ◽  
Numerical Treatments

Recent experiments on the conductance through semiconducting quantum dots weakly coupled to external leads enable us to study the ground state properties of these dots. The spacings between the resonant peaks as well as their heights indicate that the electrons in the dot are in a correlated state due to their low density, in which both disorder and electron–electron interactions determine the properties of the electron system. Numerical treatments of model Hamiltonians were successful in reproducing many of the experimentally observed features of the conductance and reveal important clues on the relevant physics behind these features. These studies also indicate that the ground state is spin polarized, a prediction which could be experimentally verified.

scholarly journals Transport in Multilevel Quantum Dots: From the Kondo Effect to the Coulomb Blockade Regime

1999 ◽  
Vol 83 (3) ◽  
pp. 600-603 ◽  
Author(s):  
A. Levy Yeyati ◽  
F. Flores ◽  
A. Martín-Rodero
Keyword(s):  
Quantum Dots ◽  
Coulomb Blockade ◽  
Kondo Effect ◽  
Coulomb Blockade Regime
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