Journal
PHYSICAL REVIEW B
Volume 85, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.024533
Keywords
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Funding
- NSF [DMR0706339, DMR1103159]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1103159] Funding Source: National Science Foundation
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Long-range phase coherence is a critical signature of macroscopic quantum phenomena. To date, nonclassical rotational inertia (NCRI) of solid helium has been reported only in samples with physical dimension of at most 5 cm. We have investigated solid helium in longer path-length torsional oscillators. Samples of length ranging from 6 to 100 cm were grown inside toroids and in self-connected long capillaries. NCRI of 4 x 10(-5) and 3 x 10(-5) were found in cells with path length of 6 and 9 cm. In cells with path length of 30 and 100 cm, NCRI, if it exists, is less than 7 x 10(-5) and 4 x 10(-5), respectively.
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