Effect of electron doping the metamagnet Sr3-yLayRu2O7

J. Farrell, R. S. Perry, A. Rost, J. F. Mercure, N. Kikugawa, S. A. Grigera, A. P. Mackenzie

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

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 (similar to 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.

Original languageEnglish
Article number180409
Number of pages4
JournalPhysical Review. B, Condensed matter and materials physics
Volume78
DOIs
Publication statusPublished - Nov 2008

Keywords

  • QUALITY SINGLE-CRYSTALS
  • QUANTUM CRITICALITY
  • RUTHENATE SR3RU2O7
  • MAGNETIC-FIELD
  • INSULATOR

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