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Multiple Metamagnetic Quantum Criticality in Sr3Ru2O7

Tokiwa, Y; Mchalwat, M; Perry, RS; Gegenwart, P; (2016) Multiple Metamagnetic Quantum Criticality in Sr3Ru2O7. Physical Review Letters , 116 (22) , Article 226402. 10.1103/PhysRevLett.116.226402. Green open access

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Abstract

Bilayer strontium ruthenate Sr 3 Ru 2 O 7 displays pronounced non-Fermi liquid behavior at magnetic fields around 8 T, applied perpendicular to the ruthenate planes, which previously has been associated with an itinerant metamagnetic quantum critical end point (QCEP). We focus on the magnetic Grüneisen parameter Γ H , which is the most direct probe to characterize field-induced quantum criticality. We confirm quantum critical scaling due to a putative two-dimensional QCEP near 7.845(5) T, which is masked by two ordered phases A and B , identified previously by neutron scattering. In addition, we find evidence for a QCEP at 7.53(2) T and determine the quantum critical regimes of both instabilities and the effect of their superposition.

Type: Article
Title: Multiple Metamagnetic Quantum Criticality in Sr3Ru2O7
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.116.226402
Publisher version: https://doi.org/10.1103/PhysRevLett.116.226402
Language: English
Additional information: © 2016 American Physical Society.
Keywords: Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/1503142
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