Picosecond charge transport in rutile at high carrier densities studied by transient terahertz spectroscopy
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F16%3A39901484" target="_blank" >RIV/00216275:25310/16:39901484 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevB.94.115206" target="_blank" >https://doi.org/10.1103/PhysRevB.94.115206</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.94.115206" target="_blank" >10.1103/PhysRevB.94.115206</a>
Alternative languages
Result language
angličtina
Original language name
Picosecond charge transport in rutile at high carrier densities studied by transient terahertz spectroscopy
Original language description
We study terahertz photoconductivity of a rutile single crystal between 10 and 300 K under strong photoexcitation by femtosecond pulses at 266 nm. A marked dependence of the carrier mobility on the carrier density is observed leading to highly complex transport phenomena on a picosecond time scale. We develop a general model of carrier photoconductive response in the case of time dependent inhomogeneous distribution of carrier density and mobility. This allows us to assess an important role of both electrons and holes in the response of photoexcited rutile. At low temperatures, the carrier mobility is initially reduced due to the electron-hole scattering and increases by one order of magnitude upon ambipolar diffusion of the carriers into deeper regions of the sample. At room temperature, contributions of transient hot optical phonons and/or of midinfrared polaron excitations with charge-density-dependent dielectric strength emerge in the photoconductivity spectra.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - 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
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
2469-9950
e-ISSN
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Volume of the periodical
94
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
"115206-1"-"115206-9"
UT code for WoS article
000383863000001
EID of the result in the Scopus database
2-s2.0-84990909269