TY - JOUR
T1 - Nonlinear Meissner effect in CuO superconductors
AU - Yip, S. K.
AU - Sauls, J. A.
PY - 1992
Y1 - 1992
N2 - Recent theories of the NMR in the CuO superconductors are based on a spin-singlet dx2-y2 order parameter. Since this state has nodal lines on the Fermi surface, nonlinear effects associated with low-energy quasiparticles become important, particularly at low temperatures. We show that the field dependence of the supercurrent, below the nucleation field for vortices, can be used to locate the positions of the nodal lines of an unconventional gap in momentum space, and hence test the proposed dx2-y2 state.
AB - Recent theories of the NMR in the CuO superconductors are based on a spin-singlet dx2-y2 order parameter. Since this state has nodal lines on the Fermi surface, nonlinear effects associated with low-energy quasiparticles become important, particularly at low temperatures. We show that the field dependence of the supercurrent, below the nucleation field for vortices, can be used to locate the positions of the nodal lines of an unconventional gap in momentum space, and hence test the proposed dx2-y2 state.
UR - http://www.scopus.com/inward/record.url?scp=0000732445&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000732445&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.69.2264
DO - 10.1103/PhysRevLett.69.2264
M3 - Article
C2 - 10046440
AN - SCOPUS:0000732445
SN - 0031-9007
VL - 69
SP - 2264
EP - 2267
JO - Physical review letters
JF - Physical review letters
IS - 15
ER -