INVESTIGADORES
GRIGERA Santiago Andres
artículos
Título:
Effect of electron doping the metamagnet Sr3−yLayRu2O7
Autor/es:
J. FARRELL; R. S. PERRY; A. ROST; J. F. MERCURE; N. KIKUGAWA; S. A. GRIGERA; A. P. MACKENZIE.
Revista:
PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS
Editorial:
AMERICAN PHYSICAL SOCIETY
Referencias:
Año: 2008 vol. 78 p. 18040901 - 18040904
ISSN:
0163-1829
Resumen:
We study the effects of adding electrons to the conduction bands of the itinerant metamagnet Sr3Ru2O7 using substitution of La3+ onto the Sr2+ site. Small changes to the chemical potential have a large effect: adding only 0.03 electrons per Ru reduces the electronic specific-heat coefficient by 30%, but makes no corresponding change to the temperature 8 K at which the electronic specific-heat coefficient shows its maximum. The observations are incompatible with a simple rigid-band shift, raising the possibility that a many-body resonance plays a key role in the physics of Sr3Ru2O7.
