Localization phenomena in disordered tantalum films

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F17%3A00476820" target="_blank" >RIV/68378271:_____/17:00476820 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.3390/met7070257" target="_blank" >http://dx.doi.org/10.3390/met7070257</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met7070257" target="_blank" >10.3390/met7070257</a>

Result language

angličtina

Original language name

Localization phenomena in disordered tantalum films

Original language description

Using dc transport and wide-band spectroscopic ellipsometry techniques we study localization phenomena in highly disordered metallic β-Ta films grown by rf sputtering deposition. The dc transport study implies non-metallic behavior (dρ/dT < 0), with negative temperature coefficient of resistivity (TCR). We found that as the absolute TCR value increased, specifying an elevated degree of disorder, the free charge carrier Drude response decreases, indicating the enhanced charge carrier localization. Moreover, we found that the pronounced changes occur at the extended spectral range, involving not only the Drude resonance, but also the higher-energy Lorentz bands, in evidence of the attendant electronic correlations. We propose that the charge carrier localization, or delocalization, is accompanied by the pronounced electronic band structure reconstruction due to many-body effects, which may be the key feature for understanding the physics of highly disordered metals.

Czech name

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Czech description

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Type

J_imp - 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.)

Project

<a href="/en/project/GA15-13778S" target="_blank" >GA15-13778S: Epitaxial effects in ferrolectric nanofilms probed by spectroscopic ellipsometry</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Metals

ISSN

2075-4701

e-ISSN

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Volume of the periodical

7

Issue of the periodical within the volume

7

Country of publishing house

CH - SWITZERLAND

Number of pages

12

Pages from-to

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UT code for WoS article

000407365900028

EID of the result in the Scopus database

2-s2.0-85022327553