Počet záznamů: 1

Interplay of electron correlations and localization in disordered β-tantalum films: evidence from dc transport and spectroscopic ellipsometry study

SYSNO ASEP	0449091
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Interplay of electron correlations and localization in disordered β-tantalum films: evidence from dc transport and spectroscopic ellipsometry study
Tvůrce(i)	Kovaleva, Natalia (FZU-D)_RID Chvostová, Dagmar (FZU-D)_{RID, SAI, ORCID} Bagdinov, A.V. (RU) Petrova, M.G. (RU) Demikhov, E.I. (RU) Pudonin, F.A. (RU) Dejneka, Alexandr (FZU-D)_{RID, ORCID}
Zdroj.dok.	Applied Physics Letters. - : AIP Publishing - ISSN 0003-6951 Roč. 106, č. 5 (2015), "051907-1"-"051907-5"
Poč.str.	5 s.
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	diffusion ; absence
Vědní obor RIV	BM - Fyzika pevných látek a magnetismus
CEP	GA15-13778S GA ČR - Grantová agentura ČR
Institucionální podpora	FZU-D - RVO:68378271
UT WOS	000349611800027
EID SCOPUS	84923902103
DOI	10.1063/1.4907862
Anotace	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.
Pracoviště	Fyzikální ústav
Kontakt	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Rok sběru	2016

Počet záznamů: 1