Design and simulation of two bits single-electron logic circuit using double quantum dot single electron transistor

Arief Udhiarto, Mohammad Ali Tamam, Ratno Nuryadi, Djoko Hartanto

Research output: Contribution to journalArticlepeer-review

Abstract

Electrons in a single electron transistor (SET) are transported one by one from source to drain based on the coulomb blockade mechanism. The transport rate is sensitively influenced by the presence of event a single electron charge located near the quantum dot. Based on this characteristic, we propose a Double Quantum Dot (DQD) SET to manipulate the presence of an electron in Quantum Dot (QD) as an implementation of a single-electron logic concept. The existence of an electron in the QD is used to represent logic 0 (no electron in QD) or logic 1 (an electron in QD). The logic states are sensed by a SET charge detector. Design of circuit based on DQD and SET charge detector are simulated by using SIMON 2.0 software. From the simulation, we have successfully developed a two-bit logic circuit by controlling the presence of an electron in DQD. We found that the existence of an electron in QD can be controlled by application of a gate voltage larger than 190μV. Gate should be separated from QD by a nontunnel capacitor of 500 aF. No larger than 1 aF of interdot tunnel capacitance is required to isolate the QD from one to another. The existence of an electron in QD is successfully detected by SET based charge detector.

Original languageEnglish
Pages (from-to)152-158
Number of pages7
JournalInternational Journal of Technology
Volume5
Issue number2
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • Charge detector
  • Double quantum dot (DQD)
  • Single electron transistor (SET)
  • Single-electron logic
  • Software SIMON 2.0

Fingerprint Dive into the research topics of 'Design and simulation of two bits single-electron logic circuit using double quantum dot single electron transistor'. Together they form a unique fingerprint.

Cite this