IAP Seminar (Supersolids in a 2D dipolar system)
Date : September 2, 2025 15:30 ~ 16:30
Speaker : Prof. Gyu-Boong Jo (Rice University)
Professor : Prof. Yong-il Shin
Location : 56-521
Supersolids in a 2D dipolar system
Supersolids are exotic states that simultaneously exhibit superfluid flow and crystal-like density modulation. Recently observed in various atomic systems, most supersolids are realized in conditions where the wave functions are essentially three-dimensional (3D).Here, we explore new scenarios in 2D, where dimensionality plays a crucial role. Particularly when dipoles are tilted, a stripe phase is expected, but it remains unclear whether the resulting stripes are coherently coupled and what properties these new configurations exhibit. To address these questions, we first study BKT superfluids from weak to strong dipolar strength with erbium-166 atoms by monitoring the equation of state and collective mode. In the strong dipolar regime, we observe the breakdown of scale invariance when dipoles are tilted, while superfluid behavior still emerges—a precursor for supersolidity. Finally, we present evidence for supersolidity observed in the system.
Supersolids are exotic states that simultaneously exhibit superfluid flow and crystal-like density modulation. Recently observed in various atomic systems, most supersolids are realized in conditions where the wave functions are essentially three-dimensional (3D).Here, we explore new scenarios in 2D, where dimensionality plays a crucial role. Particularly when dipoles are tilted, a stripe phase is expected, but it remains unclear whether the resulting stripes are coherently coupled and what properties these new configurations exhibit. To address these questions, we first study BKT superfluids from weak to strong dipolar strength with erbium-166 atoms by monitoring the equation of state and collective mode. In the strong dipolar regime, we observe the breakdown of scale invariance when dipoles are tilted, while superfluid behavior still emerges—a precursor for supersolidity. Finally, we present evidence for supersolidity observed in the system.