Phys.org July 25, 2022 Nonequilibrium hidden states provide a unique window into thermally inaccessible regimes of strong coupling between microscopic degrees of freedom in quantum materials. However, mapping the ultrafast formation of a long-lived hidden phase remains a longstanding challenge since the initial state is not recovered rapidly. Using state-of-the-art single-shot spectroscopy techniques, a team of researchers in the US (MIT, Harvard University, UT Austin) has realized a direct ultrafast visualization of the photoinduced phase transition to both transient and long-lived hidden states in an electronic crystal, 1T-TaS2, and demonstrated a commonality in their microscopic pathways, driven by the collapse […]
Tag Archives: Phase transition
Sticky electrons: When repulsion turns into attraction
EurekAlert November 10, 2020 A few years ago, researchers in Austria were able to clarify mathematically where the boundary lies between the area that follows the known rules and the area where unusual effects play an important role. An international team of researchers (Austria, USA – Georgetown University, Italy, Germany) with the help of complex calculations on supercomputers, has explained exactly what happens when this boundary is crossed: the repulsion between the electrons is suddenly counteracted by an additional attractive force that enables completely counterintuitive effects. By decomposing local and uniform susceptibilities of the Hubbard model via their spectral representations, […]