University
of Toronto
Physics Department
Condensed Matter and Quantum Optics
SPECIAL SEMINAR
University
of Toronto
| Speaker : | Dr. Klaus Voelker
Department of Physics University of Toronto |
| Topic : | Unconventional Superconductivity from a Conventional Mechanism in MgCNi3 |
| Time : | Tuesday, November 12, 2002 at 12:00 noon |
| Place : | Room MP1115, Burton Tower, 60 St. George Street / 255 Huron Street |
Abstract
In a multiband superconductor, a net repulsive interband pair scattering can stabilize a state with a nontrivial order parameter phase relation between the individual bands. Although fully gapped, such a state can break time reversal symmetry, and shows many unconventional properties: The intrinsic phase shifts give rise to bound states and spontaneous currents at surfaces and around impurities. We propose that such a new unconventional state may be realized MgCNi3, where recent experiments suggest both s-wave pairing and unconventional superconductivity.
Local Host: Hae-Young Kee
(416-978-5196) 