Normal state of extremely anisotropic superconducting cuprates as revealed by magnetotransport

Bose–Einstein condensation of strongly correlated electrons and phonons in cuprate superconductors

“…Both in-plane [54,55,56,57,58] and out-of-plane [59,60,61] resistive transitions of high-quality samples remain sharp in the magnetic field providing a reliable determination of the genuine H c2 (T ). The preformed Cooper-pair (or phase fluctuation) model [62] is incompatible with a great number of thermodynamic, magnetic, and kinetic measurements, which show that only holes (density x), [52] showing no signature of phase fluctuations above the resistive transition.…”

Reaching the Pauli limit in the cuprateBi2Sr2CuO6+δin high parallel magnetic fields

“…Nevertheless this parameter is of crucial importance since it reflects the coherence length of the Cooper pair. Owing to the large value of H c2 in the cuprates, many experiments have been devoted to resistive measurements at high magnetic field perpendicular to the conducting planes [1][2][3][4][5][6][7] and have shown an anomalous positive curvature of H c2 at low temperature. This result is in contradiction with the expected low temperature saturation described by the conventional Werthamer, Helfand, and Hohenberg ͑WHH͒ theory.…”

In-plane and out-of-plane plasma resonances in optimally doped La1.84Sr0.16CuO4

“…Therefore, the apparent hopping-like c-axis resistivity in underdoped LSCO may be attributed to the extrinsic effect arising from the stacking disorder introduced during the crystal growth along the c-axis. Indeed a metallic c-axis transport behavior was observed in 1 -3 micron thick Bi-2122 samples [33].…”