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SuperADAM CRG - Advanced Reflectometer for the Analysis of Materials

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Nuclear Spin Incoherent Neutron Scattering from Quantum Well Resonators

NR and SLD profile (top right) of SV in saturation. A schematic of the sample is shown on the right-hand side.

Amplitude of the wave field, calculated as a function of the depth in SVand αi. The resonances are marked to aid in later discussions.

(a) Reflected intensity [counts normalized by monitor] (left axis) and NSIS (right axis) of SVH0.5. The inset upper right depicts a comparison of the NSIS from SVand SVH0.5. (b) Low Q region of the NR (upper panel), SF, and NSIS (lower panel) plotted on a linear scale in absolute units (lines are guides to the eye). (c) Off-specular scattering plotted as a color map for different αi and exiting beam angles αf.

Schematics of the experimental setup at Super ADAM (top) and MAGIK (bottom) with the sample right in front of a neutron detector or an HOPG analyzer crystal installed, respectively. Dimensions are not to scale.

Nuclear Spin Incoherent Neutron Scattering from Quantum Well Resonators

We report the detection and quantification of nuclear spin incoherent scattering from hydrogen occupying interstitial sites in a thin film of vanadium. The neutron wave field is enhanced in a quantum resonator with magnetically switchable boundaries. Our results provide a pathway for the study of dynamics at surfaces and in ultrathin films using inelastic and/or quasielastic neutron scattering methods.

PHYSICAL REVIEW LETTERS 123, 016101 (2019) / DOI: 10.1103/PhysRevLett.123.016101