1 research outputs found
Time reversal symmetry breaking in cuprates induced by the spiral spin order
We propose a new interpretation of the spontaneous time reversal symmetry
breaking (TRSB) observed recently in a pseudogap state of cuprate (Kaminsky et
al.). It is shown that the TRSB dichroism in ARPES signal may be connected with
the local spiral spin structures in system. It may be caused by a spin-orbit
interaction and by spin polarization of electrons at various sections of Fermi
surface in spiral state. Angular dependence of dichroism signal is studied in
schematic KKR approximation. Tests are proposed to check an existence of the
local spiral spin structure and to distiguish it from the TRSB state with
micro-currents constructed by Varma.Comment: 7 pages, Revtex, 4 figure