TY - JOUR
T1 - Ni-substitution effects on the spin dynamics and superconductivity in La 1.85Sr 0.15CuO 4
AU - Matsuura, M.
AU - Fujita, M.
AU - Hiraka, H.
AU - Kofu, M.
AU - Kimura, H.
AU - Wakimoto, S.
AU - Perring, T. G.
AU - Frost, C. D.
AU - Yamada, K.
PY - 2012/10/24
Y1 - 2012/10/24
N2 - Systematic inelastic neutron scattering studies have been performed on La 1.85Sr 0.15Cu 1-yNi yO 4 in order to elucidate the microscopic mechanism of magnetic Ni impurity doping effects on spin dynamics and superconductivity. In contrast to Zn doping, which precipitates static or quasistatic spin correlations around dopant, Ni doping remarkably reduces E comme, the minimum energy of the upward branch of the hourglass-shaped magnetic dispersion where a commensurate magnetic peak is observed. Ni doping at y∼0.04 further reduces E comme to zero energy and broadens the distribution of E comme, corresponding to the appearance of the normal state at base temperature (T∼4 K) as well as the broadening of the superconducting transition.
AB - Systematic inelastic neutron scattering studies have been performed on La 1.85Sr 0.15Cu 1-yNi yO 4 in order to elucidate the microscopic mechanism of magnetic Ni impurity doping effects on spin dynamics and superconductivity. In contrast to Zn doping, which precipitates static or quasistatic spin correlations around dopant, Ni doping remarkably reduces E comme, the minimum energy of the upward branch of the hourglass-shaped magnetic dispersion where a commensurate magnetic peak is observed. Ni doping at y∼0.04 further reduces E comme to zero energy and broadens the distribution of E comme, corresponding to the appearance of the normal state at base temperature (T∼4 K) as well as the broadening of the superconducting transition.
UR - http://www.scopus.com/inward/record.url?scp=84868100097&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84868100097&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.86.134529
DO - 10.1103/PhysRevB.86.134529
M3 - Article
AN - SCOPUS:84868100097
SN - 0163-1829
VL - 86
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 13
M1 - 134529
ER -