DataVXACS Applied Materials & InterfacesPaper
journal article·2015-11-11

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

Tarapada Sarkar, Kalon Gopinadhan, Jun Zhou, Surajit Saha, J. M. D. Coey, Yuan Ping Feng, Ariando, T. Venkatesan

ACS Applied Materials & Interfaces· Volume 7· Issue 44
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Source abstract

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.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Electronic and Structural Properties of Oxides · Magnetic and transport properties of perovskites and related materials · Ferroelectric and Piezoelectric Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics, National University of Singapore, Singapore 117542

NUSNNI-NanoCore, National University of Singapore, Singapore 117576

School of Physics and CRANN, Trinity College, Dublin 2, Ireland

Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576

Department of Materials Science and Engineering, National University of Singapore, Singapore 119077

Funding

National Research Foundation-Prime Minister's office, Republic of Singapore · Office of the Deputy President - Research and Technology, National University of Singapore

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