Quantum oscillations near the metamagnetic transition in Sr3Ru2O7
Mercure, JF; Rost, AW; O'Farrell, ECT; et al.Goh, SK; Perry, RS; Sutherland, ML; Grigera, SA; Borzi, RA; Gegenwart, P; Gibbs, AS; MacKenzie, AP
Date: 2 June 2010
Journal
Physical Review B - Condensed Matter and Materials Physics
Publisher
American Physical Society
Publisher DOI
Abstract
We report a detailed investigation of quantum oscillations in Sr 3 Ru2 O7, observed inductively (the de Haas-van Alphen effect) and thermally (the magnetocaloric effect). Working at fields from 3 to 18 T allowed us to straddle the metamagnetic transition region and probe the low- and high-field Fermi liquids. The observed frequencies ...
We report a detailed investigation of quantum oscillations in Sr 3 Ru2 O7, observed inductively (the de Haas-van Alphen effect) and thermally (the magnetocaloric effect). Working at fields from 3 to 18 T allowed us to straddle the metamagnetic transition region and probe the low- and high-field Fermi liquids. The observed frequencies are strongly field dependent in the vicinity of the metamagnetic transition, and there is evidence for magnetic breakdown. We also present the results of a comprehensive rotation study. The most surprising result concerns the field dependence of the measured quasiparticle masses. Contrary to conclusions previously drawn by some of us as a result of a study performed with a much poorer signal-to-noise ratio, none of the five Fermi-surface branches for which we have good field-dependent data gives evidence for a strong-field dependence of the mass. The implications of these experimental findings are discussed. © 2010 The American Physical Society.
Geography - old structure
Collections of Former Colleges
Item views 0
Full item downloads 0