Multi-Band Superconductivity
Lead Research Organisation:
University of Warwick
Department Name: Physics
Abstract
Superconductivity in unconventional superconductors is often associated with the existence of several band gaps at the Fermi surface. Neutron SAS is an ideal experiment to examine such effects since the Bragg reflections from the ordered vortex state are sensitive to this characteristic as a function of applied magnetic field and temperature. Control of this feature can also be obtained by applying an external pressure. We have performed a number of neutron SAS measurements on this state at ambient pressure but no-one has yet attempted such measurements under an applied pressure. We believe from our previous experiments that it should now be possible to successfully perform such measurements. Such work is ideal for the training of a research student as it contains aspects of crystal growth, sample characterisation, neutron SAS experiments and data analysis.
Publications
Densmore J
(2009)
Small-angle neutron scattering study of the vortex lattice in superconducting LuNi 2 B 2 C
in Physical Review B
Biswas P
(2010)
Muon-spin-spectroscopy study of the penetration depth of FeTe 0.5 Se 0.5
in Physical Review B
Kulkarni P
(2011)
Crossover from paramagnetic compressed flux regime to diamagnetic pinned vortex lattice in a single crystal of cubic Ca 3 Rh 4 Sn 13
in Physical Review B
Biswas P
(2011)
Structure and superconductivity of two different phases of Re 3 W
in Physical Review B
Biswas P
(2011)
Two-gap superconductivity in Lu 2 Fe 3 Si 5 : A transverse-field muon spin rotation study
in Physical Review B
Smidman M
(2012)
Is CeCoSi 3 a superconductor?
in Journal of Physics: Conference Series
Biswas PK
(2012)
First-order reorientation transition of the flux-line lattice in CaAlSi.
in Physical review letters
Singh R
(2012)
Crystal growth of the non-centrosymmetric superconductor Nb0.18Re0.82
in Journal of Crystal Growth
Smidman M
(2014)
Investigations of the superconducting states of noncentrosymmetric LaPdSi 3 and LaPtSi 3
in Physical Review B
Singh RP
(2014)
Detection of time-reversal symmetry breaking in the noncentrosymmetric superconductor Re6Zr using muon-spin spectroscopy.
in Physical review letters
Singh R
(2014)
Crystal growth and properties of the non-centrosymmetric superconductor, Ru7B3
in Journal of Crystal Growth
Kumar S
(2015)
Paramagnetic magnetization signals and curious metastable behaviour in field-cooled magnetization of a single crystal of superconductor 2H-NbSe2.
in Journal of physics. Condensed matter : an Institute of Physics journal
Smidman M
(2015)
Evidence for a hybridization gap in noncentrosymmetric CeRuSi 3
in Physical Review B
| Description | Development of understanding of the existence of different forms of superconductivity by muon and neutron diffraction experiments. Pressure studies have reached initail stage nand look promising |
| Exploitation Route | Experimental experience developed will be used to study skyrmions, application of a Programme grant submitted 2016. Pressure work successful and will be expanded in the future. Muon work has developed Elemental analysis techniques for negative muons. |
| Sectors | Digital/Communication/Information Technologies (including Software),Electronics,Culture, Heritage, Museums and Collections,Other |
| Description | ISIS Collaboration for Muon Studies |
| Organisation | Rutherford Appleton Laboratory |
| Country | United Kingdom |
| Sector | Academic/University |
| PI Contribution | Access by proposal to the Muon Instrumentation at ISIS |
| Collaborator Contribution | Scientific collaboration and discussion |
| Impact | Development of data analysis techniques Lead to a possible impactful programme on the use of Negative Muon for Elemental Analysis for Archaeometry, Engineering and Biology from discussions based on the experiments |
| Start Year | 2008 |