A Ni-based Superconductor: the Heusler Compound ZrNi$_2$Ga

Physics – Condensed Matter – Superconductivity

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

27 pages in preprint style, 11 Figures

Scientific paper

10.1103/PhysRevB.78.184506

This work reports on the novel Heusler superconductor ZrNi2Ga. Compared to other nickel-based superconductors with Heusler structure, ZrNi2Ga exhibits a relatively high superconducting transition temperature of Tc=2.9 K and an upper critical field of 1.5 T. Electronic structure calculations show that this relatively high transition temperature is caused by a van Hove singularity, which leads to an enhanced density of states at the Fermi energy. The van Hove singularity originates from a higher order valence instability at the L-point in the electronic structure. The enhanced density of states at the Fermi level was confirmed by specific heat and susceptibility measurements. Although many Heusler compounds are ferromagnetic, our measurements of ZrNi2Ga indicate a paramagnetic state above Tc and could not reveal any traces of magnetic order down to temperatures of at least 0.35 K. We investigated in detail the superconducting state with specific heat, magnetization, and resistivity measurements. The resulting data show the typical behavior of a conventional, weakly coupled BCS (s-wave) superconductor.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

A Ni-based Superconductor: the Heusler Compound ZrNi$_2$Ga does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Ni-based Superconductor: the Heusler Compound ZrNi$_2$Ga, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Ni-based Superconductor: the Heusler Compound ZrNi$_2$Ga will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-697429

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.