Space charge oscillations in semiinsulating CdZnTe
Result description
Our work focuses on a detailed analysis of non-trivial temporal evolution of the electric field measured by the Pockels effect in a CdZnTe planar sample after biasing. The electric field varies, and in a couple of seconds, it reaches a steady state. We have observed an undershoot of the electric field evolution close to the cathode which is a sign of a local oscillation of the space charge density. An advanced deep level analysis based on thermal emission results in a single hole trap with energy E-v + 0.87 eV responsible for complex electric field behavior. Moreover, we simulated an influence of a deep level concentration N-t on the local electric field oscillations: with a higher N-t the undershoots turn to the oscillations, while with a lower N-t, the undershoots turn to the monotonous temporal evolution of the electric field.
Keywords
cdtetemperatureray-detectorsradiation detectorselectric-field distribution
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Space charge oscillations in semiinsulating CdZnTe
Original language description
Our work focuses on a detailed analysis of non-trivial temporal evolution of the electric field measured by the Pockels effect in a CdZnTe planar sample after biasing. The electric field varies, and in a couple of seconds, it reaches a steady state. We have observed an undershoot of the electric field evolution close to the cathode which is a sign of a local oscillation of the space charge density. An advanced deep level analysis based on thermal emission results in a single hole trap with energy E-v + 0.87 eV responsible for complex electric field behavior. Moreover, we simulated an influence of a deep level concentration N-t on the local electric field oscillations: with a higher N-t the undershoots turn to the oscillations, while with a lower N-t, the undershoots turn to the monotonous temporal evolution of the electric field.
Czech name
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Czech description
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Classification
Type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Applied Physics Letters
ISSN
0003-6951
e-ISSN
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Volume of the periodical
111
Issue of the periodical within the volume
10
Country of publishing house
US - UNITED STATES
Number of pages
5
Pages from-to
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UT code for WoS article
000410059200016
EID of the result in the Scopus database
2-s2.0-85029181730
Basic information
Result type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
OECD FORD
Condensed matter physics (including formerly solid state physics, supercond.)
Year of implementation
2017