Next Article in Journal
Metallization of Extruded Briquettes (BREX) in Midrex Process
Next Article in Special Issue
Excellent Performance of Fe78Si9B13 Metallic Glass for Activating Peroxymonosulfate in Degradation of Naphthol Green B
Previous Article in Journal
Failure Assessment of Steel/CFRP Double Strap Joints
Previous Article in Special Issue
The Effect of Iron Content on Glass Forming Ability and Thermal Stability of Co–Fe–Ni–Ta–Nb–B–Si Bulk Metallic Glass
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle
Metals 2017, 7(7), 257; doi:10.3390/met7070257

Localization Phenomena in Disordered Tantalum Films

1
Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, Prague 18221, Czech Republic
2
Department of Physics, Loughborough University, Loughborough LE11 3TU, UK
3
Lebedev Physical Institute, Russian Academy of Sciences, Leninskiy Prospekt 53, Moscow 119991, Russia
*
Author to whom correspondence should be addressed.
Received: 1 May 2017 / Revised: 29 June 2017 / Accepted: 30 June 2017 / Published: 7 July 2017
(This article belongs to the Special Issue Bulk Metallic Glasses)
View Full-Text   |   Download PDF [632 KB, uploaded 7 July 2017]   |  

Abstract

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 (d ρ /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. View Full-Text
Keywords: disordered metals; weak and Anderson localization; dc transport; spectroscopic ellipsometry disordered metals; weak and Anderson localization; dc transport; spectroscopic ellipsometry
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Kovaleva, N.; Chvostova, D.; Dejneka, A. Localization Phenomena in Disordered Tantalum Films. Metals 2017, 7, 257.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top