Interplay of electron correlations and localization in disordered ?-tantalum films: evidence from dc transport and spectroscopic ellipsometry study
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F15%3A00449091" target="_blank" >RIV/68378271:_____/15:00449091 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1063/1.4907862" target="_blank" >http://dx.doi.org/10.1063/1.4907862</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.4907862" target="_blank" >10.1063/1.4907862</a>
Alternative languages
Result language
angličtina
Original language name
Interplay of electron correlations and localization in disordered ?-tantalum films: evidence from dc transport and spectroscopic ellipsometry study
Original language description
We report the dc transport (5K less than or similar to T less than or similar to 380 K) and spectroscopic ellipsometry (0.8 eV <= h nu <= 8.5 eV, T similar or equal to 300 K) study of beta-Ta films prepared by rf sputtering deposition as a function of their thickness in the range 2.5 nm less than or similar to d less than or similar to 200 nm. The dc transport of the beta-Ta films with a thickness d greater than or similar to 25 nm is characterized by negative temperature coefficient of resistivity (TCR) caused by localization effects peculiar of highly disordered metals. Their dielectric function spectra display non-metallic-like behavior due to the presence of the pronounced band at 2 eV. We found that with increasing TCR absolute value, specifying elevated degree disorder, the optical spectral weight (SW) of free charge carriers decreases.
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
<a href="/en/project/GA15-13778S" target="_blank" >GA15-13778S: Epitaxial effects in ferrolectric nanofilms probed by spectroscopic ellipsometry</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2015
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
106
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
5
Pages from-to
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UT code for WoS article
000349611800027
EID of the result in the Scopus database
2-s2.0-84923902103