Seminar Fizickog fakulteta

"Superprovodni kvantni fazni prelaz u neuredjenim feromagneticima"
Rastko Sknepnek
University of Missouri-Rolla

Seminar ce se odrzati u sredu 18. decembra 2002. godine u 15 casova u
fizickom amfiteatru (III sprat, sala 661)

Abstract:
 
This talk addresses connection between two intriguing topics in
contemporary condensed matter physics: quantum phase transitions,
i.e. abrupt changes in ground state properties of the system at
zero temperature as some external parameter is varied, and exotic
superconductivity, i.e. superconducting pairing in higher, non-s,
angular momentum channel. Recent experiments observed a triplet,
p-wave, superconducting state inside the ferromagnetic phase in
various transition metal compounds, opening numerous questions on
origin and physical properties of such a state. We briefly
summarize major properties of quantum criticality and exotic
superconductivity. Then we concentrate on the specific example of
a quantum phase transition from a metal to a disordered p-wave
superconductor and describe the quantum critical behavior of such
a transition making connection to experiments.


Reference:
1-Order parameter symmetry and mode coupling effects at dirty 
superconducting quantum phase transitions, Rastko Sknepnek, 
Thomas Vojta, Rajesh Narayanan, (cond-mat/0211519)
2-Infinite-randomness critical point in the itinerant quantum,
Rastko Sknepnek, Thomas Vojta, (cond-mat/0206161)