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Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder
B. Thielemann, Ch. Rüegg, H. M. Rønnow +12
We measure by inelastic neutron scattering the spin excitation spectra as a function of applied magnetic field in the quantum spin-ladder material (C5H12N)2CuBr4. Discrete magnon m…
Pressure-induced quenching of the charge-density-wave state observed by x-ray diffraction
A. Sacchetti, C. L. Condron, S. N. Gvasaliya +11
We report an x-ray diffraction study on the charge-density-wave (CDW) LaTe and CeTe compounds as a function of pressure. We extract the lattice constants and the CDW modula…
Fermi surface and order parameter driven vortex lattice structure transitions in twin-free YBa2Cu3O7
J. S. White, V. Hinkov, R. W. Heslop +12
We report on small-angle neutron scattering studies of the intrinsic vortex lattice (VL) structure in detwinned YBa2Cu3O7 at 2 K, and in fields up to 10.8 T. Because of the suppres…
Spectroscopic evidence for preformed Cooper pairs in the pseudogap phase of cuprates
M. Shi, A. Bendounan, E. Razzoli +15
Angle-resolved photoemission on underdoped LaSrCuO reveals that in the pseudogap phase, the dispersion has two branches located above and below the Fermi le…
Field-Controlled Magnetic Order in the Quantum Spin-Ladder System (Hpip)2CuBr4
B. Thielemann, Ch. Rüegg, K. Kiefer +18
Neutron diffraction is used to investigate the field-induced, antiferromagnetically ordered state in the two-leg spin-ladder material (Hpip)2CuBr4. This "classical" phase, a conseq…
Origins of large critical temperature variations in single layer cuprates
A. D. Palczewski, T. Kondo, R. Khasanov +14
We study the electronic structures of two single layer superconducting cuprates, TlBaCuO (Tl2201) and (BiPb)(SrLa)CuO (B…