Magnetic vortex lattice in HgBa2CuO4+x observed by small-angle neutron scattering

Autor:	Li, Yuan, Egetenmeyer, N., Gavilano, J. L., Barisic, N., Greven, M.
Rok vydání:	2010
Předmět:	Condensed Matter - Superconductivity
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.83.054507
Popis:	We report a direct observation of the magnetic vortex lattice in the model high-temperature superconductor HgBa2CuO4+x. Using small-angle neutron scattering on high-quality crystals, we observe two equal domains of undistorted triangular vortex lattices well-aligned with the tetragonal crystallographic axes. The signal decreases rapidly with increasing magnetic field and vanishes above 0.4 Tesla, which we attribute to a crossover from a three-dimensional to a two-dimensional vortex system, similar to previous results for the more anisotropic compound Bi2.15Sr1.95CaCu2O8+x. Our result indicates that a triangular vortex lattice at low magnetic fields is a generic property to cuprates with critical temperatures above 80 K. Comment: 6 pages, 4 figures, submitted to PRB
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1012.0732 Zobrazit plný text záznamu View this record from Arxiv