Phys. Rev. Lett. 25, 1543–1546 (1970)Can a Solid Be "Superfluid"?Received 15 September 1970; published in the issue dated 30 November 1970 It is suggested that the property of nonclassical rotational inertia possessed by superfluid liquid helium may be shared by some solids. In particular, nonclassical rotational inertia very probably occurs if the solid is Bose-condensed as recently proposed by Chester. Anomalous macroscopic effects are then predicted. However, the associated superfluid fraction is shown to be very small (probably ≲10-4) even at T=0, so that these effects could well have been missed. Direct tests are proposed. © 1970 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.25.1543
DOI:
10.1103/PhysRevLett.25.1543
PACS:
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