@article{b29ee9874feb41f0a5e1967bcb99581f,
title = "Electron effective mass in Sn-doped monoclinic single crystal β-gallium oxide determined by mid-infrared optical Hall effect",
abstract = "The isotropic average conduction band minimum electron effective mass in Sn-doped monoclinic single crystal β-Ga2O3 is experimentally determined by the mid-infrared optical Hall effect to be (0.284 ± 0.013)m0 combining investigations on (010) and (2-01) surface cuts. This result falls within the broad range of values predicted by theoretical calculations for undoped β-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 0.267m0. 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.",
author = "Sean Knight and Alyssa Mock and Rafa{\l} Korlacki and Vanya Darakchieva and Bo Monemar and Yoshinao Kumagai and Ken Goto and Masataka Higashiwaki and Mathias Schubert",
note = "Funding Information: This work was supported by the Swedish Research Council (VR) under Grant Nos. 2013-5580 and 2016-00889, the Swedish Governmental Agency for Innovation Systems (VINNOVA) under the VINNMER international qualification program, Grant No. 2011-03486, the Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University, Faculty Grant SFO Mat LiU No. 2009 00971, and the Swedish Foundation for Strategic Research (SSF), under Grant Nos. FL12-0181 and RIF14-055. The authors further acknowledge financial support by the University of Nebraska-Lincoln, the J. A. Woollam Co., Inc., the J. A. Woollam Foundation, and the National Science Foundation (Award Nos. MRSEC DMR 1420645, CMMI 1337856, and EAR 1521428). Funding Information: This work was supported by the Swedish Research Council (VR) under Grant Nos. 2013-5580 and 2016-00889, the Swedish Governmental Agency for Innovation Systems (VINNOVA) under the VINNMER international qualification program, Grant No. 2011-03486, the Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkping University, Faculty Grant SFO Mat LiU No. 2009 00971, and the Swedish Foundation for Strategic Research (SSF), under Grant Nos. FL12-0181 and RIF14-055. The authors further acknowledge financial support by the University of Nebraska-Lincoln, the J. A. Woollam Co., Inc., the J. A. Woollam Foundation, and the National Science Foundation (Award Nos. MRSEC DMR 1420645, CMMI 1337856, and EAR 1521428).",
year = "2018",
month = jan,
day = "1",
doi = "10.1063/1.5011192",
language = "English (US)",
volume = "112",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "1",
}