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Space charge formation in chromium-compensated GaAs sensors is investigated by the laser-induced transient current technique applying pulsed and DC bias. Formation of non-standard space charge manifested by an appearance of both negatively and positively charged regions in DC biased sensors was revealed during 5 ms after switching bias. Using Monte Carlo simulations of current transients we determined enhanced electron lifetime {\tau} = 150 ns and electron drift mobility {\mu}d = 3650 cm2/Vs. We developed and successfully applied theoretical model based on fast hole trapping in the system with spatially variable hole conductivity.

Details

1009240
Subject
Simulation;
Bias;
Pulsed current;
Space charge;
Transient current;
Hole conductivity;
Computer simulation;
Radiation detectors;
Chromium;
Monte Carlo simulation
Identifier / keyword
Applied Physics; Materials Science
URL
http://arxiv.org/abs/2001.02534
Title
Space charge formation in chromium compensated GaAs radiation detectors
Author
Belas, E; Grill, R; Pipek, J; Praus, P; Bok, J; Musiienko, A; Moravec, P; Tolbanov, O; Tyazhev, A; Zarubin, A
Publication title
arXiv.org; Ithaca
Publication year
2020
Publication date
Apr 3, 2020
Section
Condensed Matter; Physics (Other)
Publisher
Cornell University Library, arXiv.org
Source
arXiv.org
Place of publication
Ithaca
Country of publication
United States
University/institution
Cornell University Library arXiv.org
Publication subject
Biology, Statistics, Physics, Mathematics, Engineering--Electrical Engineering, Computers--Computer Engineering, Business And Economics--Banking And Finance
e-ISSN
2331-8422
Source type
Working Paper
Language of publication
English
Document type
Working Paper
Publication history
 
 
Online publication date
2020-04-06
Milestone dates
2020-01-08 (Submission v1); 2020-04-03 (Submission v2)
Publication history
 
 
   First posting date
06 Apr 2020
ProQuest document ID
2334885974
Document URL
https://www.proquest.com/working-papers/space-charge-formation-chromium-compensated-gaas/docview/2334885974/se-2?accountid=208611
Full text outside of ProQuest
http://arxiv.org/abs/2001.02534
Copyright
© 2020. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.
Last updated
2023-08-22
Database
ProQuest One Academic