Abstract
Basing our arguments on a wavefunction that contains both positional and superfluid order, we propose a Ginzburg–Landau functional for a supersolid with the two order parameters necessary to describe such a phase: density n B (r) and supersolid order parameter ψ V . We argue that adding lighter. 3He atoms to a 4He supersolid produces attractive regions for vacancies, leading to patches of higher T c. On the other hand, the supersolid stiffness decreases in this granular state with increased 3He disorder. Both effects are linear in 3He concentration.
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Balatsky, A.V., Abrahams, E. Effect of Impurities on Supersolid Condensate: A Ginzburg–Landau Approach. J Supercond 19, 395–399 (2006). https://doi.org/10.1007/s10948-006-0178-3
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DOI: https://doi.org/10.1007/s10948-006-0178-3