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Disorder-sensitive phase formation linked to metamagnetic quantum criticality

Grigera, SA; Gegenwart, P; Borzi, RA; Weickert, F; Schofield, AJ; Perry, RS; ... Mackenzie, AP; + view all (2004) Disorder-sensitive phase formation linked to metamagnetic quantum criticality. SCIENCE , 306 (5699) 1154 - 1157.

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Abstract

Condensed systems of strongly interacting electrons are idea[ for the study of quantum complexity. It has become possible to promote the formation of new quantum phases by explicitly tuning systems toward special low-temperature quantum critical points. So far, the clearest examples have been appearances of superconductivity near pressure-tuned antiferromagnetic quantum critical points. We present experimental evidence for the formation of a non-superconducting phase in the vicinity of a magnetic field-tuned quantum critical point in ultrapure crystals of the ruthenate metal Sr3Ru2O7,and we discuss the possibility that the observed phase is due to a spin-dependent symmetry-breaking Fermi surface distortion.

Type:Article
Title:Disorder-sensitive phase formation linked to metamagnetic quantum criticality
Keywords:FERMI-LIQUID, RUTHENATE SR3RU2O7, SUPERCONDUCTIVITY, INSTABILITY, TRANSITIONS, ELECTRON, ORDER
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology

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