Flux Line Lattice Melting and the Formation of a Coherent Quasiparticle Bloch State in the Ultraclean URu${}_2$Si${}_2$ Superconductor

R. Okazaki, Y. Kasahara, H. Shishido +7

We find that in ultraclean heavy-fermion superconductor URu${}_2$Si${}_2$ ($T_{c0}=1.45$ K) a distinct flux line lattice melting transition with outstanding characters occurs well belo…