A route to ultrathin quantum gases at polar perovskite heterointerfaces

Safdar Nazir, Udo Schwingenschlögl

Research output: Contribution to journalArticlepeer-review

Abstract

Oxide interfaces are attracting interest in recent years due to special functionalities of two-dimensional quantum gases. However, with typical thicknesses of at least 10-12 Å the gases still extend considerably in the third dimension, which compromises the size of quantum effects. To overcome this limitation, we propose incorporation of highly electronegative cations, such as Ag. By ab initio calculations, we demonstrate the formation of a mobile two-dimensional hole gas in AgNbO 3/SrTiO 3 that is confined to an ultrathin slab of only 5.6 Å thickness. Electronegative cations therefore are a promising way to enhance the quantum nature of hole gases. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish (US)
Pages (from-to)373-375
Number of pages3
Journalphysica status solidi (RRL) - Rapid Research Letters
Volume6
Issue number9-10
DOIs
StatePublished - Sep 7 2012

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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