Magnetic field effect on the superconducting magnetic gap of Nd1.85Ce0.15CuO4.
Inelastic neutron-scattering measurements on the archetypical electron-doped material Nd1.85Ce0.15CuO4 up to a high relative magnetic-field strength, H/H(c2) approximately 50%, reveal a simple linear magnetic-field effect on the superconducting magnetic gap and the absence of field-induced in-gap states. The extrapolated gap-closing field value is consistent with the upper critical field H(c2), and the high-field response resembles that of the paramagnetic normal state.
Motoyama
E M
EM
Department of Physics, Stanford University, Stanford, California 94305, USA.
Mang
P K
PK
Petitgrand
D
D
Yu
G
G
Vajk
O P
OP
Vishik
I M
IM
Greven
M
M