Events at Physics |
Events During the Week of October 20th through October 27th, 2024
Monday, October 21st, 2024
- No events scheduled
Tuesday, October 22nd, 2024
- Wisconsin Quantum Institute
- Quantum Coffee Hour
- Time: 3:00 pm - 4:00 pm
- Place: Rm.5294, Chamberlin Hall
- Abstract: Please join us for the WQI Quantum Coffee today at 3PM in the Physics Faculty Lounge (Rm.5294 in Chamberlin Hall). This series, which takes place approximately every other Tuesday, aims to foster a casual and collaborative atmosphere where faculty, post-docs, students, and anyone with an interest in quantum information sciences can come together. There will be coffee and treats.
Wednesday, October 23rd, 2024
- No events scheduled
Thursday, October 24th, 2024
- R. G. Herb Condensed Matter Seminar
- In-situ twisting and imaging of moiré superlattices
- Time: 10:00 am - 6:00 pm
- Place: 5310 Chamberlin
- Speaker: Monica Allen, UCSD
- Abstract: Moiré superlattices, which form in twisted stacks of 2D materials, constitute a versatile platform for the exploration of topological and correlated phenomena. Here we present a route to mechanically tune the twist angle of individual atomic layers with a precision of a fraction of a degree inside a scanning probe microscope, which enables continuous control of the electronic band structure in-situ. In twisted bilayer graphene, we demonstrate nanoscale control of the moiré wavelength via mechanical rotation, as revealed using piezoresponse force microscopy. We also extend this methodology to create twistable boron nitride devices, enabling dynamic control of the ferroelectric domain structure. This approach provides a route for real-time manipulation of moiré materials, which may allow for systematic investigation of the phase diagrams at multiple angles in a single device. Looking forward, we will also discuss progress on the construction of a new milliKelvin microwave impedance microscope in a dilution refrigerator, which supports spatially-resolved detection of topological states in the GHz regime. As an application, I will briefly discuss the imaging of edge modes in a Chern insulator.
- Host: Alex Levchenko
Friday, October 25th, 2024
- Physics Department Colloquium
- Title to be announced
- Time: 3:30 pm
- Place: TBA
- Speaker: Daniel Green, UC San Diego
- Host: Moritz Münchmeyer, Gary Shiu