This paper reviews the progressive results of the vortex-matter phase diagram for the high-T
c superconductor YBa 2 Cu 3 O y in magnetic fields up to 30 T. Evidence of the first-order …

A pivotal step toward understanding unconventional superconductors would be to decipher
how superconductivity emerges from the unusual normal state. In the cuprates, traces of …

In the underdoped pseudogap regime of cuprate superconductors, the normal state is
commonly probed by applying a magnetic field (H). However, the nature of the H-induced …

We report measurements of the oxygen-isotope effect (OIE) on the in-plane penetration
depth λ ab (0) in underdoped La 2− x Sr x CuO 4 single crystals. A highly sensitive magnetic …

The effect of uniaxial pressure on superconductivity was examined for high-Tc cuprate La1:
64Eu0: 2-Sr0: 16CuO4, which is located at the boundary between the superconducting and …

High-resolution magnetic-torque studies on an untwinned YBa 2 Cu 3 O 7− δ single crystal
near its critical temperature T c reveal that the first-order vortex-lattice melting transition …

We studied the conduction noise spectrum in the vortex state of a high-temperature
superconductor, Bi 2 Sr 2 CaCu 2 O y, subject to a uniform driving force. Two characteristic …

The evolution of vortex states and vortex-lattice melting processes in Bi 2 Sr 2 CaCu 2 O 8+
y under tilted fields are observed a by differential magnetooptical technique. The vortex …

The iron-based superconductors are characterized by strong fluctuations due to high
transition temperatures and small coherence lengths. We investigate fluctuation behavior in …

We present an extensive study of vortex dynamics in a high-quality single crystal of
HgBa2CuO4+ δ, a highly anisotropic superconductor that is a model system for studying the …