Tampere University of Technology

TUTCRIS Research Portal

Stability of the Dirac cone in artificial graphene formed in quantum wells: A computational many-electron study

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Article number083014
JournalNew Journal of Physics
Volume18
Issue number8
DOIs
Publication statusPublished - 1 Aug 2016
Publication typeA1 Journal article-refereed

Abstract

We carry out a comprehensive computational study on the stability of the Dirac cone in artificial graphene realized in nanopatterned quantum wells. Our real-space approach allows us to vary the size, shape, and positioning of the quantum dots in the hexagonal lattice. We compare the (noninteracting) single-particle calculations to density-functional studies within both local-density approximation and meta-generalized-gradient approximation. Furthermore, the density-functional results are compared against numerically precise path-integral quantum Monte Carlo calculations. As a whole, our results indicate high stability of the Dirac bands against external parameters, which is reassuring for further experimental investigations.

ASJC Scopus subject areas

Keywords

  • Artificial grapheme, Dirac materials, Stability properties

Publication forum classification

Field of science, Statistics Finland

Downloads statistics

No data available