Accession Number:

AD1069124

Title:

Tuning bad metal and non-Fermi liquidbehavior in a Mott material: Rare-earth nickelate thin films

Descriptive Note:

Journal Article - Open Access

Corporate Author:

University of California Santa Barbara United States

Report Date:

2015-11-06

Pagination or Media Count:

8.0

Abstract:

Resistances that exceed the Mott-Ioffe-Regel limit known as bad metal behavior and non-Fermi liquid behavior are ubiquitous features of the normal state of many strongly correlated materials. We establish the conditions that lead to bad metal and non-Fermi liquid phases in NdNiO3, which exhibits a prototype bandwidth-controlled metal insulator transition. We show that resistance saturation is determined by the magnitude of Ni eg orbital splitting, which can be tuned by strain in epitaxial films, causing the appearance of bad metal behavior under certain conditions. The results shed light on the nature of a crossover to a non-Fermi liquid metal phase and provide a predictive criterion for Anderson localization. They elucidate a seemingly complex phase behavior as a function of film strain and confinement and provide guidelines for orbital engineering and novel devices.

Subject Categories:

  • Electrical and Electronic Equipment
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE