Nonsaturating large magnetoresistance in semimetals
Abstract
The intensive recent investigations of topological semimetals have revealed a large number of semimetal compounds that exhibit very large nonsaturating magnetoresistance. Multiple mechanisms for this magnetoresistance phenomenon have been theoretically proposed, but experimentally it is unclear how to identify which mechanism is responsible in a particular sample or how to make a clean connection between experimental observations and theoretical models. Our results show that the magnetic susceptibility and the tangent of the Hall angle successfully capture the fundamental differences in seemingly similar nonsaturating large magnetoresistance, where charge compensation, energy dispersion, and the roles of disorder are markedly distinct, and provide empirical templates to characterize the origins of the extraordinary magnetotransport properties in the newly discovered topological semimetals and beyond.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 03, 2018
- Source ID
- 10.1073/pnas.1808747115
Entities
People
- Andrew C. Treglia
- Ian A. Leahy
- Justin C. W. Song
- Minhyea Lee
- Peter E. Siegfried
- Rahul M. Nandkishore
- Yu-Ping Lin
Organizations
- Army Research Office
- Nanyang Technological University
- National Research Foundation
- National Science Foundation
- University of Colorado