Changing spin and orbital ground state symmetries in colloidal nanoplatelets with magnetic fields
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Title
Changing spin and orbital ground state symmetries in colloidal nanoplatelets with magnetic fieldsDate
2022-04-01Publisher
WileyISSN
0370-1972; 1521-3951Bibliographic citation
Llusar, J. and Climente, J.I. (2022), Changing Spin and Orbital Ground State Symmetries in Colloidal Nanoplatelets with Magnetic Fields. Phys. Status Solidi B 2200081.Type
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Abstract
The symmetry of the electronic ground state is of paramount importance in determining the magnetic, optical and electrical properties of semiconductor nanostructures. Here it is shown theoretically that non-trivial ... [+]
The symmetry of the electronic ground state is of paramount importance in determining the magnetic, optical and electrical properties of semiconductor nanostructures. Here it is shown theoretically that non-trivial spin and orbital symmetries can be induced in colloidal nanoplatelets by applying out-of-plane magnetic fields. Two scenarios are presented. The first one deals with two electrons confined inside a platelet. Here, the strong electron-electron exchange interaction reduces the interlevel energy spacing set by lateral quantum confinement. As a result, relatively weak magnetic fields suffice to induce a singlet-to-triplet spin transition. The second one deals with type-II core/crown nanoplatelets. Here, the crown has doubly-connected topology, akin to that of quantum rings. As a result, the energy levels of carriers within it undergo Aharonov-Bohm oscillations. This implies changes in the ground state orbital symmetry, which switch the exciton and trion optical activity from bright to dark. [-]
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Physica status solidi (b) : basic solid state physics (2022)Funder Name
Ministerio de Ciencia e Innovación (Spain) | Universitat Jaume I
Project code
CTQ2017-83781-P | UJI-B2021-06
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info:eu-repo/semantics/openAccess
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