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Singlet–triplet transition of a two-electron quantum ring in magnetic and electric fields

✍ Scribed by F. Malet; M. Pi; Ll. Serra; E. Lipparini

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
143 KB
Volume
40
Category
Article
ISSN
1386-9477

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✦ Synopsis

We present an exact numerical calculation of the spin phase diagram of a two-electron quantum ring as a function of an applied inplane electric field E and a perpendicular magnetic field B. In general, large E and B favour, respectively, singlet and triplet states. At low fields, however, the spin phase diagram shows singlet-triplet oscillations and the formation of spin islands surrounded by the complementary phase. Calculations of the density dipole excitation spectrum as a function of the electric field are also reported.

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