Probing the enigmatic vortex lattice in electron-doped cuprate superconductors
The cuprates are ideal type-II superconductors for the study of exotic vortex physics. Cuprates can be either hole- or electron-doped; many SANS studies of the vortex lattice (VL) in hole-doped compounds such as YBCO and LSCO have provided important insights into topics such as vortex matter and the symmetries of superconducting and electronic structures. In contrast, progress on electron-doped systems has been held back by the difficulty to produce clean materials, and despite many attempts very few SANS studies of the VL are reported. In 2013, a breakthrough was achieved in the sample preparation of the electron-doped cuprate Pr(1.3-x)La(0.7)Ce(x)CuO(4+d) (PLCCO). For optimised sample annealing conditions, a high quality superconducting phase exists below a critical temperature of ~18 K. We propose to take advantage of this materials breakthrough and launch a renewed effort to study the VL in electron-doped cuprates. An important goal is to resolve the still controversial nature of the superconducting order parameter, and determine if its in-plane angular dependence deviates significantly from the usual d-wave gap in the hole-doped cuprates.
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WHITE Jonathan; ADACHI Tadashi; CHANG Johan and DEWHURST Charles. (2014). Probing the enigmatic vortex lattice in electron-doped cuprate superconductors. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-42-372
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