Literature DB >> 26509804

Electron Transport at the TiO₂ Surfaces of Rutile, Anatase, and Strontium Titanate: The Influence of Orbital Corrugation.

Tarapada Sarkar1,2, Kalon Gopinadhan2, Jun Zhou1, Surajit Saha2, J M D Coey3, Yuan Ping Feng1, T Venkatesan1,2,4,5.   

Abstract

The two-dimensional electron gas in SrTiO3 created by an overlayer of amorphous LaAlO3 is compared with those at the TiO2-terminated surfaces of rutile and anatase. Differences in conductivity are explained in terms of the limiting Ti-O-Ti bond angles (orbital corrugation), band dispersion, and polaron formation. At 300 K, the sheet conductivity and mobility of anatase exceed those for SrTiO3 or rutile by one or two orders of magnitude, respectively. The electrons in rutile become localized below 25 K.

Entities:  

Keywords:  anatase; anisotropic conductivity; bond angles; mobility; rutile; strontium titanate; two-dimensional electron gas

Year:  2015        PMID： 26509804     DOI： 10.1021/acsami.5b06694

Source DB:  PubMed          Journal:  ACS Appl Mater Interfaces        ISSN： 1944-8244            Impact factor:   9.229


  1 in total

1.  Direct visualization of Rashba-split bands and spin/orbital-charge interconversion at KTaO3 interfaces.

Authors:  Sara Varotto; Annika Johansson; Börge Göbel; Luis M Vicente-Arche; Srijani Mallik; Julien Bréhin; Raphaël Salazar; François Bertran; Patrick Le Fèvre; Nicolas Bergeal; Julien Rault; Ingrid Mertig; Manuel Bibes
Journal:  Nat Commun       Date:  2022-10-18       Impact factor: 17.694
  1 in total

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