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Search: WFRF:(Josefi Josef)

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  • Potts, Heidi, et al. (author)
  • Symmetry-controlled singlet-triplet transition in a double-barrier quantum ring
  • 2021
  • In: Physical Review B. - 2469-9950. ; 104:8
  • Journal article (peer-reviewed)abstract
    • We engineer a system of two strongly confined quantum dots to gain reproducible electrostatic control of the even-electron spin at zero magnetic field. Coupling the dots in a tight ring-shaped potential with two tunnel barriers, we demonstrate that an electric field can switch the electron ground state between a singlet and a triplet configuration. Comparing our experimental cotunneling spectroscopy data to a full many-body treatment of interacting electrons in a double-barrier quantum ring, we find excellent agreement in the evolution of many-body states with electric and magnetic fields. The calculations show that the singlet-triplet energy crossover, not found in conventionally coupled quantum dots, is made possible by the ring-shaped geometry of the confining potential.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Leijnse, Martin (1)
Dick, Kimberly A. (1)
Lehmann, Sebastian (1)
Bengtsson, Jakob (1)
Reimann, Stephanie M ... (1)
Thelander, Claes (1)
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Chen, I. Ju (1)
Potts, Heidi (1)
Josefi, Josef (1)
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University
Lund University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2021 (1)

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