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Measurements have been made of the low-temperature magnetic response of single, isolated, micron-size Au loops. The magnetic response is found to contain a component which oscillates with the applied magnetic flux with a fundamental period of Φ0=h/e. The amplitude of the oscillatory component corresponds to a persistent current of ≃(0.3–2.0)evF/L, 1 to 2 orders of magnitude larger than predicted by current theories.


Chandrasekhar, V., Webb, R.A., Brady, M.J., Ketchen, M.B., Gallagher, W.J., and Kleinsasser, A. (1991). Magnetic Response of a Single, Isolated Gold Loop. Physical Review Letters, 67(25), 3578–3581. doi: 10.1103/PhysRevLett.67.3578

© 1991 The American Physical Society.

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