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

• Published in: Physica. B, Condensed matter Vol. 403; no. 5; pp. 1544 - 1546
• Main Authors: Heidrich-Meisner, F., Martins, G.B., Al-Hassanieh, K.A., Feiguin, A.E., Dagotto, E.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.04.2008; Elsevier
• Subjects: DMRG; Exact sciences and technology; Physics; Quantum dots; Transport; Transport; Quantum dots; DMRG; Finite size effect; Spin correlations; Renormalization group method; Digital simulation; Spin fluctuations; Density matrix; Nanostructures; Cluster model; Time dependence; Size effect; Scaling laws; Renormalization; Embedded cluster method
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2007.10.339

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.