There is growing evidence that solid helium-4 possesses superfluid properties, but the nature of this paradoxical phenomenon remains mysterious. The finding that helium-4 in its 'supersolid' form is stiffer than the normal solid adds to the enigma.
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References
Kim, E. & Chan, M. H. W. Nature 427, 225–227 (2004).
Kim, E. & Chan, M. H. W. Science 305, 1941–1944 (2004).
Balibar, S. & Caupin, F. J. Phys. Condens. Matter 20, 173201 (2008).
Day, J. & Beamish, J. Nature 450, 853–856 (2007).
West, J. T., Syshchenko, O., Beamish, J. & Chan, M. H. W. Nature Phys. 5, 598–601 (2009).
Rittner, A. S. & Reppy, J. D. Phys. Rev. Lett. 101, 155301 (2008).
Lin, X., Clark, A. C., Cheng Z. G. & Chan, M. H. W. Phys. Rev. Lett. 102, 125302 (2009).
Prokof'ev, N. Adv. Phys. 56, 381–402 (2007).
Boninsegni, M. et al. Phys. Rev. Lett. 99, 035301 (2007).
Pollet, L. et al. Phys. Rev. Lett. 98, 135301 (2007).
Pollet, L. et al. Phys. Rev. Lett. 101, 097202 (2008).
Hunt, B. et al. Science 324, 632–636 (2009).
Anderson, P. W. Science 324, 631–632 (2009).
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Balibar, S. Stiffer but flowing. Nature Phys 5, 534–535 (2009). https://doi.org/10.1038/nphys1354
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DOI: https://doi.org/10.1038/nphys1354
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