Magnetic Field Effect on the Superconducting Magnetic Gap of Nd1.85Ce0.15CuO4

E. M. Motoyama; P. K. Mang; D. Petitgrand; G. Yu; O. P. Vajk; I. M. Vishik; M. Greven

doi:10.1103/PhysRevLett.96.137002

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Magnetic Field Effect on the Superconducting Magnetic Gap of Nd1.85Ce0.15CuO4

E. M. Motoyama, P. K. Mang, D. Petitgrand, G. Yu, O. P. Vajk, I. M. Vishik, M. Greven

DOI 10.1103/PhysRevLett.96.137002 · Physical Review Letters

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Abstract

Inelastic neutron-scattering measurements on the archetypical electron-doped material Nd1.85Ce0.15CuO4 up to a 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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nd1.85Ce0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	22	Pressure not reported	onset
Nd1.85Ce0.15Cu0.985Ni0.015O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown