Finite-size scaling analysis of spin correlations and fluctuations of two quantum dots in a T-shape geometry

Journal Article · Tue Jan 01 00:00:00 EST 2008 · Physica B: Condensed Matter

DOI:https://doi.org/10.1016/j.physb.2007.10.339· OSTI ID:1048753

Heidrich-Meisner, Fabian ^[1]; Martins, G. B. ^[2]; Al Hassanieh, Khaled A ^[1]; Feiguin, A. E. ^[3]; Dagotto, Elbio R ^[1]

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1. ORNL
2. Oakland University, Rochester, MI
3. University of California, Santa Barbara

The study of interacting nanostructures such as quantum dots is a playground for several novel numerical approaches. Recently developed methods such as the time-dependent density matrix renormalization approach or the embedded-cluster approximation rely on the numerical solution of clusters of finite-size. For the interpretation of numerical results, it is important to understand finite-size and boundary effects. Here, we study spin fluctuations and spin spin correlations of two dots coupled in a T-shape geometry. Depending on odd even effects, quite different results emerge from clusters that do not differ much in size. r 2007 Elsevier B.V. All rights reserved.

• 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: 1048753
• Journal Information: Physica B: Condensed Matter, Vol. 403, Issue 5-9; ISSN 0921-4526
• Country of Publication: United States
• Language: English