Spin-Orbit Scattering and Quantum Metallicity in Ultra-Thin Be Films

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

We compare and contrast the low temperature magnetotransport properties of ultra-thin, insulating, Be films with and without spin-orbit scattering (SOS). Beryllium films have very little intrinsic SOS, but by "dusting" them with sub-monolayer coverages of Au, one can introduce a well controlled SOS rate. Pure Be films with sheet resistance R >R_Q exhibit a low-temperature negative magnetoresistance (MR) that saturates to the quantum resistance R_Q = h/e^2. This high-field quantum metal phase is believed to represent a new ground state of the system. In contrast, the corresponding negative MR in Be/Au films is greatly diminished, suggesting that, in the presence of strong SOS, the quantum metal phase can only be reached at field scales well beyond those typically available in a low temperature laboratory.
12 pages, 4 figures, to appear in PRB

Keywords

Strongly Correlated Electrons, Superconductivity

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/215749

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0901.1873
 http://arxiv.org/abs/0901.1873

Collections

arXiv