Work

Multiple Metamagnetic Quantum Criticality in Sr3Ru2O7

Year: 2016

Type: article

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.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.116.226402

Authors: Y. Tokiwa, M. Mchalwat, R. S. Perry, P. Gegenwart

Institutions: Kyoto University, University of Göttingen, London Centre for Nanotechnology, University College London, University of Augsburg

Language: Latvian

Topic: Magnetic and transport properties of perovskites and related materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: Engineering and Physical Sciences Research Council, Japan Society for the Promotion of Science

Awards: Observation of elementary excitations in quantum spin ice, Strongly correlated electron physics in novel materials, G7715641445