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Tuesday, April 19, 2016
3:30 PM - 4:30 PM
CNLS Conference Room (TA-3, Bldg 1690)

Q-Mat Seminar

Quantum materials in extreme magnetic fields

Brad Ramshaw
MPA-CMMS

Frontiers in experimental physics often involve extreme environments: the lowest temperatures, the highest energies, the fastest timescales. Over the past two decades, pulsed magnetic fields have moved from a niche technique to an experimental powerhouse, routinely providing access to magnetic fields of up to 100 Tesla—five times what is commercially available. I will describe how we use the 45 Tesla steady-state magnetic fields in Tallahassee, combined with pulsed-fields up to 92 Tesla at LANL, to measure the Fermi surface of the high-Tc superconductor YBa2Cu3O6+x. These experiments give us insight into broken electronic symmetries in the system, and how broken symmetry affects electronic interactions and superconductivity. I will also describe some very recent work that includes taking Weyl semimetals to the quantum limit, and the search for the fractional quantum hall effect in graphene.

Host: Amanda Neukirch