Dresden 2006 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

TT: Tiefe Temperaturen

TT 8: Correlated Electrons: Heavy Fermions

TT 8.10: Vortrag

Montag, 27. März 2006, 17:00–17:15, HSZ 301

Fermi surface and renormalization effects in heavy fermion superconductors — •Andreas Koitzsch¹, Sergey Borisenko¹, Jochen Geck¹, Volodymyr Zabolotnyy¹, Dmytro Inosov¹, Martin Knupfer¹, Jörg Fink¹, Bernd Büchner¹, and Eric Bauer² — ¹IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany — ²Los Alamos National Laboratory, Los alamos, Mew Mexico 87545, USA

The heavy fermion compounds of the type CeTIn₅ (T = Co, Ir, Rh) show a rich variety of interesting solid-state phenomena which have shifted them under the focus of current research. Firstly, the compound CeCoIn₅ shows superconductivity below T = 2,3 K at ambient pressure. This is the record value for heavy fermion superconductors. The interplay between the Kondo effect and the RKKY interaction, the close neighborhood between magnetism and superconductivity and the vicinity to a quantum critical point decisively influence the low-energy physics of these systems.

We investigated the electronic structure of this materials by angle-resolved photoemission spectroscopy. We measured the Fermi surface and the band structure along the high-symmetry directions. We compare our results to de-Haas-van-Alphen experiments and to band structure calculations and discuss the signatures of the low-energy mass renormalization.