journal article·2015-01-01Open access

Monte Carlo analysis of transient electron transport in wurtzite Zn1−xMgxO combined with first principles calculations

Ping Wang, Linlin Hu, Yintang Yang, Xuefei Shan, Jiuxu Song, Lixin Guo, Zhiyong Zhang

AIP Advances· Volume 5· Issue 1

Abstract

Transient characteristics of wurtzite Zn1−xMgxO are investigated using a three-valley Ensemble Monte Carlo model verified by the agreement between the simulated low-field mobility and the experiment result reported. The electronic structures are obtained by first principles calculations with density functional theory. The results show that the peak electron drift velocities of Zn1−xMgxO (x = 11.1%, 16.7%, 19.4%, 25%) at 3000 kV/cm are 3.735 × 107, 2.133 × 107, 1.889 × 107, 1.295 × 107 cm/s, respectively. With the increase of Mg concentration, a higher electric field is required for the onset of velocity overshoot. When the applied field exceeds 2000 kV/cm and 2500 kV/cm, a phenomena of velocity undershoot is observed in Zn0.889Mg0.111O and Zn0.833Mg0.167O respectively, while it is not observed for Zn0.806Mg0.194O and Zn0.75Mg0.25O even at 3000 kV/cm which is especially important for high frequency devices.
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Research context

OpenAlex topics: ZnO doping and properties · Gas Sensing Nanomaterials and Sensors · Ga2O3 and related materials

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

Affiliations

Xidian University 1 State Key Laboratory of Integrated Service Networks, School of Telecommunications Engineering, , Xi’an 710071, People’s Republic of China

Xidian University 2 School of Physics and Optoelectronic Engineering, , Xi’an 710071, People’s Republic of China

Xidian University 3 Key Laboratory of the Ministry of Education for Wide Band-Gap Semiconductor Materials and Devices, School of Microelectronics, , Xi’an 710071, People’s Republic of China

Northwest University 4 School of Information Science and Technology, , Xi’an 710127, People’s Republic of China

Funding

111 project of China · nature science basic research plan in shaanxi province of China, the China postdoctoral science special foundation · the China postdoctoral science foundation · the fundamental research funds for the central universities · National Natural Science Foundation of China

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