Phys.org May 20, 2022
A long-standing challenge has been to realize materials that integrate and connect tunable electrical transport and tunable spin configurations. Two-dimensional materials offer a platform to realize this concept but known 2D magnetic semiconductors are electrically insulating in their magnetic phase. An international team of researchers (USA – Columbia University, Brookhaven National Laboratory, Oak Ridge National Laboratory, Washington University, Japan) demonstrated tunable electron transport within the magnetic phase of the 2D semiconductor chromium sulfide bromide (CrSBr) and showed strong coupling between its magnetic order and charge transport. Exploiting the sensitivity of magnetoresistance to magnetic order, they uncovered a second regime characterized by coupling between charge carriers and magnetic defects. The magnetoresistance within this regime can be dynamically and reversibly tuned by varying the carrier concentration using an electrostatic gate, providing a mechanism for controlling charge transport in 2D magnets… read more. TECHNICAL ARTICLE
Crystal structure, device fabrication and transport signatures of CrSBr magnetic ordering. Credit: Nature Materials (2022)Â