R. Liang

From incommensurate to dispersive spin-fluctuations : The high-energy inelastic spectrum in superconducting YBa2Cu3O6.5

We have investigated the spin-fluctuations at energy transfers up to

Optical properties along the c-axis of YBa2Cu3O6+x, for x = 0.50 → 0.95 evolution of the pseudogap

\ensuremath{\sim}110\phantom{\rule{0.3em}{0ex}}\mathrm{meV}

Direct measurement of the upper critical field in cuprate superconductors

, well above the resonance energy

Evidence for static magnetism in the vortex cores of ortho-II YBa2Cu3O6.50.

(33\phantom{\rule{0.3em}{0ex}}\mathrm{meV})

Change of carrier density at the pseudogap critical point of a cuprate superconductor

in the

Field Induced Reduction of the Low-Temperature Superfluid Density in YBa{sub 2}Cu{sub 3}O{sub 6.95}

\mathrm{Y}{\mathrm{Ba}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{6.5}

Giant enhancement of the thermal Hall conductivity kappa(xy) in the superconductor YBa(2)Cu(3)O(7).

ortho-II superconductor using neutron time-of-flight and triple-axis techniques. The spectrum at high energies differs from the low-energy incommensurate modulations previously reported where the incommensurate wave vector is largely independent of energy. Well above the resonance the peak of the spin response lies at wave vectors that increase with energy. Within error the excitations at all energies above the resonance are best described by a ring around the

Evidence for a small hole pocket in the Fermi surface of underdoped YBa2Cu3Oy

(\ensuremath{\pi},\ensuremath{\pi})

Detection of the unusual magnetic orders in the pseudogap region of a high-temperature superconducting YBa2Cu3O6.6 crystal by muon-spin relaxation.

position. The isotropic wave-vector pattern differs from a recently reported square pattern in different but related systems. The spin spectral weight at high energies is similar to that in the insulator but the characteristic velocity is

Inhomogeneous magnetic-field response of YBa2Cu3Oy and La2-xSrxCuO4 persisting above the bulk superconducting transition temperature.

\ensuremath{\sim}40%