2005/01/17 by Xi Dai, Michael Ma, Fu‐Chun Zhang +1
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #cond-mat.stat-mech #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.72.132504
published as Phys. Rev. B 72, 132504 (2005) · 5 pages, 2 figures
arxiv created 2005/01/17 · openalex publication_date 2005/10/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Although both vacancies and interstitials have relatively high activation energies in the normal solid, we propose that a lower energy bound state of a vacancy and an interstitial may facilitate vacancy condensation to give supersolidity in 4He. We use a phenomenological two-band boson lattice model to demonstrate this new mechanism and discuss the possible relevance to the recently observed superfluidlike, nonclassical rotational inertial experiments of Kim and Chan in solid 4He. Some of our results may also be applicable to trapped bosons in optical lattices.