Area of research
Condensed Matter Physics · Electronic, Optical and Magnetic Materials
Research interest
Research topics from publications: Magnetic phase diagram of underdoped YBa 2 Cu 3 O y inferred from torque magnetization and thermal conductivity; Thermodynamic signature of a magnetic-field-driven phase transition within the superconducting state of an underdoped cuprate. Representative work: Significance We obtain the magnetic phase diagram in the underdoped cuprate YBa 2 Cu 3 O y using torque magnetometry at temperatures 0.3–70 K and magnetic fields up to 45 T. At low fields, vortices (quantized flux tubes) form a vortex solid that is strongly pinned to the lattice. At large fields, melting of the solid to a vortex liquid produces nonzero dissipation. However, the vortex liquid persists to fields above 41 T. We have also mapped out the “transition” fields at which the charge-density–wave state (observed in X-ray diffraction experiments) becomes stable. Our results show that, in intense fields, superconductivity adjusts to coexist with the charge-density wave, but the Cooper pai