Transport Properties of Strongly Correlated Electrons in Quantum Dots Studied with a Simple Circuit Model

Journal Article · Sun Jan 01 00:00:00 EST 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.066802· OSTI ID:976007

Martins, G. B. ^[1]; Busser, Carlos A ^[2]; Al Hassanieh, Khaled A ^[2]; Anda, E. V. ^[3]; Moreo, Adriana ^[2]; Dagotto, Elbio R ^[2]

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1. Oakland University, Rochester, MI
2. ORNL
3. Pontificia Universidade, Brazil

Numerical calculations are shown to reproduce the main results of recent experiments involving nonlocal spin control in quantum dots [Craig et al., Science 304, 565 (2004).]. In particular, the experimentally reported zero-bias-peak splitting is clearly observed in our studies. To understand these results, a simple 'circuit model' is introduced and shown to qualitatively describe the experiments. The main idea is that the splitting originates in a Fano antiresonance, which is caused by having one quantum dot side connected in relation to the current's path. This scenario provides an explanation of the results of Craig et al. that is an alternative to the RKKY proposal, also addressed here.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 976007
• Journal Information: Physical Review Letters, Vol. 96, Issue 6; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRONS
QUANTUM DOTS
SPIN
TRANSPORT
Transport
Properties
Quantum Dots