Individuals with disabilities are encouraged to attend all UNI-sponsored events. If you are a person with a disability who requires a reasonable accommodation in order to participate in this program, please contact firstname.lastname@example.org at least one week prior to the event.
Wednesday, September 27, 2023 - 4:00 pm to 6:00 pm
Each week is different at the market! You can search for a vendor or products at the market HERE. When you search for a vendor you can see the dates they will be at the market. Check out our MAP that also shows vendors attending each week!
College Hill Farmers Market is a producer only market offering quality products including fresh seasonal produce, healthy snacks, baked goods, eggs, honey and more. Vendors may only sell items that have been raised, prepared, or produced by the vendor or their family members.
Join The Learning Center at Rod Library on Tuesdays and Wednesdays at 4 p.m. in Rod 272 for free academic success workshops! This week on September 26 and 27, learn about Note Taking. Learn and Practice three popular note taking methods: Cornell, Outlining and Mapping. Attendance will enter you into prize drawings! More information on the workshops offered this semester can be found on the Academic Workshops webpage.
Physics Colloquium: Probing Collective Quantum Effects of Interacting Spins on the Honeycomb Lattice
Wednesday, September 27, 2023 - 4:00 pm
Dr. Andrew Christianson from Oak Ridge National Laboratory will present on probing collective quantum effects of interacting spins on the honeycomb lattice. In quantum magnetism, elegantly simple model systems exhibit rich behavior that enables the testing of fundamental ideas which in turn serve as the basis for understanding and identifying more complex behavior. This talk will focus on the physics of the honeycomb lattice Heisenberg model as probed experimentally by neutron scattering methods. The honeycomb lattice Heisenberg model is uncomplicated: only nearest neighbor Heisenberg interactions are considered; there is no frustration, and the ground state at T=0 is the Néel state. Inelastic neutron scattering measurements reveal that the low energy magnetic excitation spectrum consists of conventional spin waves and an unusually sharp feature within a broad continuum. The broad continuum corresponds to a two-magnon contribution while the sharp feature within this continuum is identified as a Van Hove singularity in the joint density of states. We discuss how quantum effects renormalize the single-magnon and multimagnon excitations and how this renormalization can be tuned and ultimately driven to the classical limit by applying a magnetic field. From a more general perspective, this work demonstrates that structures within magnetic continua can occur over a wide experimental parameter space and can be used as a reliable means of identifying quantum phenomena.
The Mid-Autumn Festival, also known as the Moon Festival or Mooncake Festival, is a traditional festival celebrated in Chinese culture. Join the Office of Internation Engagement as we celebrate this year's Mid Autumn Festival in conjuction with the Hearst Center of Arts. We will be making moon cakes and lanterns along with delicious food and other activities.