Coulomb blockade in Quantum Dots

Collective Coulomb blockade in an array of quantum dots: A Mott-Hubbard approach.

We investigate the electron addition spectrum in a class of Hubbard-like models which describe arrays of coupled quantum dots. Interdot tunneling leads to a sequence of two phase transitions separating a region of collective Coulomb blockade from a region where the Coulomb blockade of individual dots is maintained and a region where the Coulomb blockade is destroyed altogether. Observable exper...

Mesoscopic Coulomb Blockade in One-Channel Quantum Dots

Signatures of “mesoscopic Coulomb blockade” are reported for quantum dots with one fully transmitting point-contact lead; T1 ­ 1, T2 ø 1. Unlike the Coulomb blockade (CB) in weaktunneling devices sT1, T2 ø 1d, one-channel CB is a mesoscopic effect requiring quantum coherence. Several distinctive features of mesoscopic CB are observed, including a reduction in CB upon breaking time-reversal symm...

Tunneling Conductance and Coulomb Blockade Peak Splitting of Two Quantum Dots Connected by a Quantum Point Contact

By using bosonization method and unitary transformation, we give a general relation between the dimensionless tunneling conductance and the fractional Coulomb blockade conductance peak splitting which is valid both for weak and strong transmission between two quantum dots, and show that the tunneling conductance has a linear temperature dependence in the low energy and low temperature limit.

طراحی و مدل سازی مبدل های آنالوگ به دیجیتال سازگار با دمای اتاق به کمک نانوترانزیستورهای تک الکترونی با جزیره کوانتوم نقطه ای نیمه هادی

In this article, the design and modeling details of room-temperature analog-to-digital converter (ADC) based on silicon quantum-dot (QD) single-electron transistors (SETs) is presented. In contrast to the conventional metal quantum dots, the use of silicon QDs in the scales of few nano-meters enhances the device operation and makes stable the Coulomb blockade and Coulomb oscillation regimes at ...

Srction 2 Quantum - Effect Devices Chapter 1 Statistical Mechanics of Quantum Dots Chapter 2 Artificial Atoms Chapter 3 Coulomb Blockade in Single and Double Quantum Dots

Chapter 3 . Coulomb Blockade In Single And Double Quantum Dots

A few years ago, Professor Kastner's research group discovered that the conductance through a quantum dot weakly coupled to the leads shows periodic peaks as a function of the voltage on a gate electrode. 1 This behavior was attributed to the phenomenon of Coulomb blockade: to add an electron to the dot, the system must have an energy equal to the electrostatic energy of a dot charged by one el...