Tunable Coulomb blockade and giant Coulomb blockade magnetoresistance in a double quantum dot array

Journal Article · Sat Jan 01 00:00:00 EST 2011 · International Journal of Quantum Chemistry

OSTI ID:1024249

Zhang, Xiaoguang ^[1]; Xiang, T. ^[2]

---

1. ORNL
2. Chinese Academy of Sciences

We propose a Hubbard model to illuminate the tunneling effect of electrons in a double quantum dot array connected in the parallel circuit configuration to electrodes. The change in the interdot coupling is shown to dramatically influence the Coulomb blockade properties, consistent with earlier experimental observations. For magnetic double dots, the interdot coupling can be tuned by the external magnetic field, leading to a giant Coulomb blockade magnetoresistance.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1024249
• Journal Information: International Journal of Quantum Chemistry, Vol. 112, Issue 1; ISSN 0020-7608
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CONFIGURATION
ELECTRODES
ELECTRONS
HUBBARD MODEL
MAGNETIC FIELDS
MAGNETORESISTANCE
QUANTUM DOTS
TUNNELING