University
of Toronto
Physics Department
Condensed Matter and Quantum Optics
MONDAY SEMINAR
University
of Toronto
| Speaker : | Dr. Makariy Tanatar, Department of Physics, University of Toronto |
| Topic : |
Phase states and phase transformations of CeMIn_5 (M=Co, Rh, Ir) |
| Time : | Monday, February 24, 2003 at 12:00 noon |
| Place : | Room MP408, Burton Tower, 60 St. George Street / 255 Huron Street |
Abstract
The recent discovery of a new family of heavy-fermion superconductors with general formula CeMIn_5 (M=Co, Ir, Rh or their solid solutions) has generated much interest. The ground state of these compounds can be fine-tuned between magnetic order, superconductivity (SC), and a coexistence of the two by varying both pressure and alloy composition. CeCoIn_5, with the highest ambient pressure superconducting transition temperature, T_c, of all heavy-fermion compounds, is believed to be close to a point where the magnetic state becomes unstable in T=0 limit. After reviewing the properties of these compounds, I will talk about our study of phase instability in CeCoIn_5 induced by magnetic field. I will show field-induced restoration of Landau Fermi-liquid state, proceeding in a critical manner. The relation of this phase instability with superconducting state will be discussed.
Local Host: Hae Young Kee
(416-946-5196) 