Magnetic field effect on the superconducting magnetic gap of Nd1.85Ce0.15CuO4
Abstract
Inelastic neutron scattering measurements on the archetypical electron-doped material Nd1.85Ce0.15CuO4 up to high relative magnetic field strength, H/Hc2 ~ 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 Hc2, and the high-field response resembles that of the paramagnetic normal state.
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