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Rohrmeier, Christoph ; Donarini, Andrea

Precession of entangled spin and pseudospin in double quantum dots

Artikel

Rohrmeier, Christoph und Donarini, Andrea (2022) Precession of entangled spin and pseudospin in double quantum dots. Physical Review B 105 (20), S. 205418.

DOI zum Zitieren dieses Dokuments: 10.5283/epub.52325


Zusammenfassung

Quantum dot spin valves are characterized by exchange fields which induce spin precession and generate current spin resonances even in the absence of spin splitting. Analogous effects have been studied in double quantum dots, in which the orbital degree of freedom, the pseudospin, replaces the spin in the valve configuration. We generalize, now, this setup to allow for arbitrary spin and orbital ...

Quantum dot spin valves are characterized by exchange fields which induce spin precession and generate current spin resonances even in the absence of spin splitting. Analogous effects have been studied in double quantum dots, in which the orbital degree of freedom, the pseudospin, replaces the spin in the valve configuration. We generalize, now, this setup to allow for arbitrary spin and orbital polarization of the leads, thus obtaining an even richer variety of current resonances, stemming from the precession dynamics of entangled spin and pseudospin. We observe for both vectors a delicate interplay of decoherence, pumping, and precession which can only be understood by also considering the dynamics of the spin-pseudospin correlators. The numerical results are obtained in the framework of a generalized master equation within the cotunneling approximation and are complemented by the analytics of a coherent sequential tunneling model.



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Details

DokumentenartArtikel
Titel eines Journals oder einer ZeitschriftPhysical Review B
VerlagAMER PHYSICAL SOC
Open Access ArtSHERPA/RoMEO
Ort der VeröffentlichungCOLLEGE PK
Band105
Nummer des Zeitschriftenheftes oder des Kapitels20
SeitenbereichS. 205418
Datum13 Mai 2022
Veröffentlichungsdatum24 Mai 2022 08:54
InstitutionenPhysik > Institut für Theoretische Physik > Lehrstuhl Professor Grifoni > Arbeitsgruppe Milena Grifoni
Identifikationsnummer
WertTyp
10.1103/PhysRevB.105.205418DOI
Verwandte URLs
URLURL Typ
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.105.205418Verlag
Stichwörter / Keywords;
Dewey-Dezimal-Klassifikation500 Naturwissenschaften und Mathematik > 530 Physik
StatusVeröffentlicht
BegutachtetJa, diese Version wurde begutachtet
An der Universität Regensburg entstandenJa
URN der UB Regensburgurn:nbn:de:bvb:355-epub-523250
Dokumenten-ID52325

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