We use k·p theory to estimate the Rashba spin-orbit coupling (SOC) in large semiconductor nanowires. We specifically investigate GaAs- and InSb-based devices with different gate configurations to control symmetry and localization of the electron charge density. We explore gate-controlled SOC for wires of different size and doping, and we show that in high carrier density SOC has a nonlinear electric field susceptibility, due to large reshaping of the quantum states. We analyze recent experiments with InSb nanowires in light of our calculations. Good agreement is found with the SOC coefficients reported in Phys. Rev. B 91, 201413(R) (2015)PRBMDO1098-012110.1103/PhysRevB.91.201413, but not with the much larger values reported in Nat. Commun. 8, 478 (2017)2041-172310.1038/s41467-017-00315-y. We discuss possible origins of this discrepancy.

Tuning Rashba spin-orbit coupling in homogeneous semiconductor nanowires / Wojcik, Pawel; Bertoni, Andrea; Goldoni, Guido). - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 97:16(2018), pp. 165401-165401. [10.1103/PhysRevB.97.165401]

Tuning Rashba spin-orbit coupling in homogeneous semiconductor nanowires

Bertoni Andrea
;
Goldoni Guido)
2018

Abstract

We use k·p theory to estimate the Rashba spin-orbit coupling (SOC) in large semiconductor nanowires. We specifically investigate GaAs- and InSb-based devices with different gate configurations to control symmetry and localization of the electron charge density. We explore gate-controlled SOC for wires of different size and doping, and we show that in high carrier density SOC has a nonlinear electric field susceptibility, due to large reshaping of the quantum states. We analyze recent experiments with InSb nanowires in light of our calculations. Good agreement is found with the SOC coefficients reported in Phys. Rev. B 91, 201413(R) (2015)PRBMDO1098-012110.1103/PhysRevB.91.201413, but not with the much larger values reported in Nat. Commun. 8, 478 (2017)2041-172310.1038/s41467-017-00315-y. We discuss possible origins of this discrepancy.
97
16
165401
165401
Tuning Rashba spin-orbit coupling in homogeneous semiconductor nanowires / Wojcik, Pawel; Bertoni, Andrea; Goldoni, Guido). - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 97:16(2018), pp. 165401-165401. [10.1103/PhysRevB.97.165401]
Wojcik, Pawel; Bertoni, Andrea; Goldoni, Guido)
File in questo prodotto:
File Dimensione Formato  
PhysRevB.97.165401.pdf

accesso aperto

Descrizione: articolo principale
Tipologia: Versione dell'editore (versione pubblicata)
Dimensione 2.98 MB
Formato Adobe PDF
2.98 MB 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/11380/1166883
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 20
  • ???jsp.display-item.citation.isi??? 20
social impact