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Lower Critical Fields of Superconducting PrFeAsO Single Crystals
R. Okazaki, M. Konczykowski, C. J. van der Beek +12
We have studied the lower critical fields H_{c1} of superconducting iron oxipnictide PrFeAsO_{1-y} single crystals for H parallel and perpendicular to the ab-planes. Measurements o…
Microwave Surface-Impedance Measurements of the Magnetic Penetration Depth in Single Crystal Ba1-xKxFe2As2 Superconductors: Evidence for a Disorder-Dependent Superfluid Density
K. Hashimoto, T. Shibauchi, S. Kasahara +10
We report high-sensitivity microwave measurements of the in-plane penetration depth and quasiparticle scattering rate in several single crystals of hole-doped Fe-bas…
Entanglement of Solid Vortex Matter: A Boomerang Shaped Reduction Forced by Disorder in Interlayer Phase Coherence in Bi2Sr2CaCu2O8+y
T. Kato, T. Shibauchi, Y. Matsuda +2
We present evidence for entangled solid vortex matter in a glassy state in a layered superconductor BiSrCaCuO containing randomly splayed linear defects. The in…
Microwave Penetration Depth and Quasiparticle Conductivity in PrFeAsO_1-y Single Crystals : Evidence for a Full-Gap Superconductor
K. Hashimoto, T. Shibauchi, T. Kato +9
In-plane microwave penetration depth and quaiparticle conductivity at 28 GHz are measured in underdoped single crystals of the Fe-based superconductor PrFeAsO ($T_…
Field-induced quantum critical route to a Fermi liquid in high-temperature superconductors
T. Shibauchi, L. Krusin-Elbaum, M. Hasegawa +3
In high transition temperature (T_c) superconductivity, charge doping is a natural tuning parameter that takes copper oxides from the antiferromagnet to the superconducting region.…
Magneto-transport properties governed by the antiferromagnetic fluctuations in heavy fermion superconductor CeIrIn
Y. Nakajima, H. Shishido, H. Nakai +8
In quasi-two dimensional Ce(Ir,Rh)In system, it has been suggested that the phase diagram contains two distinct domes with different heavy fermion superconducting states. We he…
Nature of c-axis coupling in underdoped Bi2Sr2CaCu2O8 with varying degrees of disorder
Panayotis Spathis, Sylvain Colson, Feng Yang +7
The dependence of the Josephson Plasma Resonance (JPR) frequency in heavily underdoped Bi2Sr2CaCu2O8+δon temperature and controlled pointlike disorder, introduced by high-energy el…