Static Dielectric Constant of β-Ga2O3 Perpendicular to the Principal Planes (100), (010), and (001)
Static Dielectric Constant of β-Ga2O3 Perpendicular to the Principal Planes (100), (010), and (001)
复制标题
β-Ga2O3 垂直于主面 (100)、(010) 和 (001) 的静态介电常数
DOI:
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发表时间:
2019
影响因子:
2.2
通讯作者:
K. Irmscher
中科院分区:
文献类型:
--
作者:
A. Fiedler;R. Schewski;Z. Galazka;K. Irmscher
Therelativestaticdielectricconstant ɛ r of β -Ga 2 O 3 perpendiculartotheplanes(100),(010),and(001)isdeterminedinthetemperature rangefrom25Kto500KbymeasuringtheACcapacitanceofcorrespondinglyorientedplatecapacitorstructuresusingtestfrequenciesofupto1MHz.Thisallowsadirectquantificationofthestaticdielectricconstantandauniquedirectionassignmentoftheobtainedvalues.Atroomtemperature, ɛ r perpendicular to the planes (100), (010), and (001) amounts to 10.2 ± 0.2, 10.87 ± 0.08, and 12.4 ± 0.4, respectively, which clearly evidence the anisotropy expected for β -Ga 2 O 3 due to its monoclinic crystal structure. An increase of ɛ r by about 0.5 with increasing temperature from 25 K to 450 K was found for all orientations. Our ɛ r data resolve the inconsistencies in the previously available literature data with regard to absolute values and their directional assignment and therefore provide a reliable basis for the simulation and design of devices. © The an access under the terms of the Creative Commons Attribution