Berry phase in spinning nuclear magnetic resonance

Harii, Kazuya; Chudo, Hiroyuki ; Ono, Masao  ; Matsuo, Mamoru; Ieda, Junichi   ; Okayasu, Satoru  ; Yasuoka, Hiroshi; Maekawa, Sadamichi; Saito, Eiji

Spin angular momentum in a rotating body feels an interaction of the rotation. Recently, the interaction called the spin-rotation coupling was directly observed by spinning NMR measurements as the NMR frequency shifts. In the measurement, we can apply a time-dependent external field on the sample by tilting the rotation axis from an external magnetic filed, The time-dependent external field generates Berry phases and the Berry phases affect the NMR frequency. We report experimental and theoretical studies of the NMR frequency for the system in tilted rotation.