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Electron effective mass in Sn-doped monoclinic single crystal beta-gallium oxide determined by mid-infrared optical Hall effect
University of Nebraska, NE 68588 USA.
University of Nebraska, NE 68588 USA.
University of Nebraska, NE 68588 USA.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
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2018 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 112, no 1, article id 012103Article in journal (Refereed) Published
Abstract [en]

The isotropic average conduction band minimum electron effective mass in Sn-doped monoclinic single crystal beta-Ga2O3 is experimentally determined by the mid-infrared optical Hall effect to be (0.2846 +/- 0.013)m(0) combining investigations on (010) and ((2) over bar 01) surface cuts. This result falls within the broad range of values predicted by theoretical calculations for undoped beta-Ga2O3. The result is also comparable to recent density functional calculations using the Gaussian-attenuation-Perdew-Burke-Ernzerhof hybrid density functional, which predict an average effective mass of 0.267m(0). Within our uncertainty limits, we detect no anisotropy for the electron effective mass, which is consistent with most previous theoretical calculations. We discuss upper limits for possible anisotropy of the electron effective mass parameter from our experimental uncertainty limits, and we compare our findings with recent theoretical results. Published by AIP Publishing.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2018. Vol. 112, no 1, article id 012103
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-144445DOI: 10.1063/1.5011192ISI: 000419392600011OAI: oai:DiVA.org:liu-144445DiVA, id: diva2:1176584
Note

Funding Agencies|Swedish Research Council (VR) [2013-5580, 2016-00889]; Swedish Governmental Agency for Innovation Systems (VINNOVA) under the VINNMER international qualification program [2011-03486]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University, Faculty Grant SFO Mat LiU [2009 00971]; Swedish Foundation for Strategic Research (SSF) [FL12-0181, RIF14-055]; University of Nebraska-Lincoln; J. A. Woollam Co., Inc.; J. A. Woollam Foundation; National Science Foundation [MRSEC DMR 1420645, CMMI 1337856, EAR 1521428]

Available from: 2018-01-22 Created: 2018-01-22 Last updated: 2018-02-20

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