Details of Grant 

EPSRC Reference:	GR/R50271/01
Title:	Novel Quantum Order in Ultra-pure Ruthenates
Principal Investigator:	MacKenzie, Professor AP
Other Investigators:	Julian, Professor S
Researcher Co-Investigators:
Project Partners:	Kyoto University University of Birmingham University of Cambridge
Department:	Physics and Astronomy
Organisation:	University of St Andrews
Scheme:	Standard Research (Pre-FEC)
Starts:	01 April 2002	Ends:	30 September 2004	Value (£):	254,437
EPSRC Research Topic Classifications:	Materials Characterisation Materials Synthesis & Growth
EPSRC Industrial Sector Classifications:	No relevance to Underpinning Sectors
Related Grants:
Panel History:
Summary on Grant Application Form
Ruthenates are proving to be ideal materials for investigating some of the most topical phenomena in condensed matter physics. There is now good evidence that Sr2Ru04 is a triplet superconductor, and it continues to attract world-wide attention. Very recently, we have extended careful study to its bilayer cousin, Sr3Ru207, and have uncovered evidence for novel class of quantum criticality, in which the tuning parameter is an applied magnetic field. The observation raises a range of theoretical questions, and gives strong motivation for a number of ambitious and technically demanding experiments. We will combine precise low temperature studies of bulk transport and thermodynamic properties with the use of microscopic probes such as quantum oscillations and (working with collaborators) inelastic neutron scattering. As part of the programme, we will investigate 'combined tuning' of the quantum criticality by working at a combination of low temperatures, high magnetic fields and very high pressures. This will be achieved using sapphire anvil pressure cells being developed in our group. The experiments place special demands on crystal growth, so that will also be performed in-house, in brand new facilities that we will install using external sources of funding. The research will include growth of other ruthenate compounds, on which we will attempt adventurous experiments aimed at elucidating the origins of unconventional superconductivity.
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Organisation Website:	http://www.st-and.ac.uk