Stark effect and polarizability of graphene quantum dots

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

4 Citationer (Scopus)
216 Downloads (Pure)


The properties of graphene quantum dots can be manipulated via lateral electric fields. Treating electrons in such structures as confined massless Dirac fermions, we derive an analytical expression for the quadratic Stark shift valid for arbitrary angular momentum and quantum dot size. Moreover, we determine the perturbative regime, beyond which higher order field effects are observed. The Dirac approach is validated by comparison with atomistic tight-binding simulations. Finally, we study the influence on the Stark effect of band gaps produced by e.g. interaction with the substrate.
TidsskriftPhysical Review B
Udgave nummer11
Antal sider5
StatusUdgivet - 18 sep. 2017

Fingeraftryk Dyk ned i forskningsemnerne om 'Stark effect and polarizability of graphene quantum dots'. Sammen danner de et unikt fingeraftryk.