2004/05/10 by Devis Bellucci, Massimo Rontani, Filippo Troiani +2 · 1 citation
Mathematics · Physics and Astronomy · #Condensed matter physics #Coulomb #Degrees of freedom (physics and chemistry) #Electron #Field (mathematics) #Magnetic field #Magnetic properties of thin films #Mathematics #Molecule #Phase (matter) #Phase diagram #Phase transition #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum phase transition #Semiconductor Quantum Structures and Devices #Singlet state #Spin (aerodynamics) #Triplet state #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.69.201308
To appear in Phys. Rev. B - Rapid Comm. - 5 pages, 3 figures
arxiv created 2004/05/10 · openalex publication_date 2004/05/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the magnetic field induced singlet/triplet transition for two electrons in vertically-coupled quantum dots by exact diagonalization of the Coulomb interaction. We identify the different mechanisms occurring in the transition, involving either in-plane correlations or localization in opposite dots, depending on the field direction. Therefore, both spin and orbital degrees of freedom can be manipulated by field strength and direction. The phase diagram of realistic devices is determined.