Thin films with 2D behavior and linear galvanomagnetic response
Abstract
This project aims to stimulate intensive experimental research on narrow-band semiconductors such as topological insulators and semimetals and to observe large linear magnetoresistance which shows no sign of saturation in classically strong magnetic fields at room temperature. We will employ a novel, semimetal materials synthesis approach, using multi-target sputtering and automated characterization techniques for structural, surface and galvanomagnetic properties with the expectation of speeding up the process of discovery of the so called huge linear magnetoresistance and to investigate the appropriate parameters to achieve the proposed materials systems all the requirements mentioned above.We use the proper deposition conditions to tune the band gap from p-type to n-type behavior and from metal to semimetal samples by controlling systematically their stoichiometry and degree of disorder. A universal linear-in-B magnetoresistance can be expected in a variety of two component systems if there is a fine adjustment between bulk and edge contributions. This opens up the possibilities for exploration of novel two component systems that might outperform the effect of linear magnetoresistance observed so far in a very limited number of two component systems and to develop novel 2D materials with conceptually new galvanomagnetic behavior, novel and innovative techniques to search for huge linear magnetoresistance in two component thin film systems.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 28, 2017
- Source ID
- FA95501710178
Entities
People
- Athanassios Speliotis
Organizations
- Air Force Office of Scientific Research
- National Center for Scientific Research
- United States Air Force