Thursday, November 17, 2011, 1:30 pm — Small Seminar Room, Bldg. 510
Spin excitations in a magnet with ordered moments are magnons, quantized spin waves that behave like particles with integer spin and Bose-Einstein statistics. A magnet lacking long-range order cannot support spin waves and may have unusual magnetic excitations with noninteger spin and different statistics. Heisenberg antiferromagnets with spins of length $S=1/2$ on kagome (a network of corner-sharing triangles) have emerged as a leading candidate for novel quantum physics. Magnetic excitations in this system are spinons, particles with spin 1/2 and fermionic statistics. Thanks to exchange-mediated attraction, spinons form small pairs with spin 0. The spin gap is set by the binding energy of a pair, about 0.06 of the exchange constant.
Hosted by: Alexei Tsvelik
7757 | INT/EXT | Events Calendar
Not all computers/devices will add this event to your calendar automatically.
A calendar event file named "calendar.ics" will be placed in your downloads location. Depending on how your device/computer is configured, you may have to locate this file and double click on it to add the event to your calendar.
Event dates, times, and locations are subject to change. Event details will not be updated automatically once you add this event to your own calendar. Check the Lab's Events Calendar to ensure that you have the latest event information.