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.

Competing mechanisms for singlet-triplet transition in artificial molecules / Bellucci, D.; Rontani, Massimo; Troiani, Filippo; Goldoni, Guido; Molinari, Elisa. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 69:(2004), pp. 1-4.

Competing mechanisms for singlet-triplet transition in artificial molecules

D. BELLUCCI;RONTANI, Massimo;TROIANI, Filippo;GOLDONI, Guido;MOLINARI, Elisa
2004

Abstract

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.
69
1
4
Competing mechanisms for singlet-triplet transition in artificial molecules / Bellucci, D.; Rontani, Massimo; Troiani, Filippo; Goldoni, Guido; Molinari, Elisa. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 69:(2004), pp. 1-4.
Bellucci, D.; Rontani, Massimo; Troiani, Filippo; Goldoni, Guido; Molinari, Elisa
File in questo prodotto:
File Dimensione Formato  
PhysRevB_69_201308_04.pdf

accesso aperto

Tipologia: Versione dell'editore (versione pubblicata)
Dimensione 198.87 kB
Formato Adobe PDF
198.87 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/455001
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 32
  • ???jsp.display-item.citation.isi??? 33
social impact