caa a22 4500 44538266X CHVBK 20180317143022.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s10948-011-1194-5 doi (NATIONALLICENCE)springer-10.1007/s10948-011-1194-5 Spin-vortices and Spin-vortex-induced Loop Currents in the Pseudogap Phase of Cuprates [Elektronische Daten] [Ryo Hidekata, Hiroyasu Koizumi] We explain several anomalous phenomena observed in the pseudogap phase of hole-doped cuprates based on the recently proposed spin-vortex superconductivity theory. In this theory, doped-holes become almost immobile small polarons, and spin-vortices are formed with those small polarons as their centers. A Hartree-Fock field for conduction electrons that is optimized for the interaction energy of local moments is derived; it contains a fictitious magnetic field arising from spin-vortices, and yields current carrying states. The obtained currents are loop currents around spin-vortices, i.e., the spin-vortex-induced loop currents (SVILCs), and a collection of them produces a macroscopic current. The SVILC explains (1)nonzero Kerr rotation in zero-magnetic field after exposed in a strong magnetic field; (2)the change of the sign of the Hall coefficient with temperature change; (3)the suppression of superconductivity in the x=1/8 static-stripe ordered sample; and (4)alarge anomalous Nernst signal, including its sign-change with temperature change. We show that the hourglass-shaped magnetic excitation spectrum is the evidence for the existence of spin-vortices. We further argue that the "Fermi-arc” in the ARPES is a support for the presence of localized moments in the bulk; a disconnected arc-shaped Fermi surface is obtained by assuming an antiferromagnetic interaction between the localized moments in the bulk and itinerant electrons in the surface region. The Author(s), 2011 Cuprate superconductor nationallicence Pseudogap nationallicence Spin-vortex nationallicence Loop current nationallicence Magnetic excitation nationallicence Nernst effect nationallicence ARPES nationallicence Hidekata Ryo Institute of Materials Science, University of Tsukuba, 305-8573, Tsukuba, Ibaraki, Japan aut Koizumi Hiroyasu Institute of Materials Science, University of Tsukuba, 305-8573, Tsukuba, Ibaraki, Japan aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/8(2011-11-01), 2253-2267 1557-1939 24:8<2253 2011 24 10948 https://doi.org/10.1007/s10948-011-1194-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-011-1194-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hidekata Ryo Institute of Materials Science, University of Tsukuba, 305-8573, Tsukuba, Ibaraki, Japan aut NATIONALLICENCE 700 1- Koizumi Hiroyasu Institute of Materials Science, University of Tsukuba, 305-8573, Tsukuba, Ibaraki, Japan aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/8(2011-11-01), 2253-2267 1557-1939 24:8<2253 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer