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- Nilsson Tengstrand, M., et al.
(författare)
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Toroidal dipolar supersolid with a rotating weak link
- 2023
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Ingår i: Physical Review A. - 2469-9926. ; 107:6
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Tidskriftsartikel (refereegranskat)abstract
- Ring-shaped superfluids with weak links provide a perfect environment for studying persistent currents and dynamic stirring protocols. Here, we investigate the effects of a weak-link system on dipolar supersolids. By calculating the ground-state energy at fixed angular momenta, we find that metastable persistent currents may exist in the supersolid phase near the superfluid transition point. When stirring the weak link rapidly enough, we show that vortices can enter the supersolid. These vortex entries cause phase slips, emitting solitonic excitations that interfere with the crystalline structure of the supersolid, leading to a continuous melting and recrystallization of the droplets. Finally, we examine the release of vortex-carrying supersolids from the trap, observing that the released density exhibits a discrete structure associated with the density modulation and a central hole resulting from the vortex core.
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- Puglia, Carla, et al.
(författare)
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Core level spectroscopy study of N-2 adsorbed on (2x2)K/graphite
- 1998
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Ingår i: SURFACE SCIENCE. - 0039-6028. ; 414:1-2, s. 118-130
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- We report a study of N-2/(2 x 2)K/graphite at 25 K using X-ray photoemission, X-ray absorption (XAS), ultraviolet photoemission, autoionization and Auger spectroscopies. At this temperature me found that N-2 physisorbs. Comparisons with the physisorbed sy
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