Physics Program Presents
Magnetic and Electrical Tunability of Resistivity in the Two-Dimensional van der Waals Semiconductor CrSBr
Friday, April 23, 2021
Online Event
12:00 pm – 1:00 pm EDT/GMT-4
12:00 pm – 1:00 pm EDT/GMT-4
Evan Telford, Columbia University
The study of two-dimensional (2D) materials is one of the fastest growing fields in condensed matter physics. These materials promise to revolutionize nanotechnology due to the ability to easily isolate clean atomically-thin sheets of conducting material for use in atomic-scale circuits. Since the initial demonstration of the electric-field effect in devices fabricated from mechanically exfoliated graphene, the number of available 2D compounds that can be integrated into nanocircuits has grown exponentially to encompass diverse electronic properties such as semiconductors, superconductors, and magnets. A significant engineering challenge within the 2D community is the fabrication of devices from air-sensitive 2D crystals for electrical transport measurements. We have successfully addressed this challenge by developing a technique for embedding metal electrodes within atomically-thin insulating flakes used to simultaneously contact and preserve a wide array of air-sensitive 2D materials. Using this technique, we fabricated electrical transport devices from few-layer CrSBr, a new magnetic 2D semiconductor. We found CrSBr adopts a unique spin configuration in which individual layers ferromagnetically order internally, while adjacent layers couple antiferromagnetically. Through electrical transport measurements on CrSBr down to the single-layer limit, we observed strong coupling between magnetic order and electronic properties, leading to a resistivity that is reversibly controlled through external magnetic and electric fields.Zoom link for the event:
https://bard.zoom.us/j/6121711443?pwd=d2k5NnNvWncwSEhNY1ovTTdUSHY1Zz09
Meeting ID: 612 171 1443
Passcode: 431280
Meeting ID: 612 171 1443
Passcode: 431280
For more information, call 845-758-6822, e-mail [email protected],
or visit https://bard.zoom.us/j/6121711443?pwd=d2k5NnNvWncwSEhNY1ovTTdUSHY1Zz09.
Time: 12:00 pm – 1:00 pm EDT/GMT-4
Location: Online Event