Investigating charge-structure coupling in soft materials for information processing and actuation. We will discuss the thermodynamics of information, compare the efficiency of different information processing architectures (CPU vs. brain), and explore the rich physics when electrostatics, elasticity, and hydrodynamics are coupled on the nanoscale. This will be illustrated by charge-regulation in polymers, DNA packing in […]

Topology and phase transitions in twisted nodal superconductors    “Twistronics” paradigm has been tremendously successful in realizing strongly correlated and topological phases of electrons in two-dimensional semiconductors or semimetals. In my talk, I will show that twisted bilayers of nodal superconductors allow a similar degree of control over the neutral quasiparticles in superconductors.     […]

Liang Wu (U Penn) "Novel nonlinear optical response in PT-invariant antiferromagnets"

Speaker: David Weld of UCSB Location: Bloomberg 462 Title: Probing quantum dynamics with strongly driven ultracold atoms Abstract: Degenerate gases in modulated optical potentials are a flexible testbed for the experimental study of quantum matter driven far from equilibrium. I will present results from a sequence of recent experiments in this area, on topics ranging from […]

Speaker: Mark Rudner (U Washington) “Dynamical quantum materials” When pushed out of equilibrium, quantum materials can host interesting types of internal fields -- dc or ac electric fields, currents, etc., -- that cannot persist in equilibrium. Feedback of these potentially very strong fields on the material's underlying band structure and quantum geometry can lead to […]

Speaker: Tomoya Higo of U. Tokyo Title: Electrical manipulation and detection of topological states in heterostructures based on the Weyl antiferromagnet Mn3Sn Abstract: Various elementary particles previously proposed in high-energy physics are now being observed as quasiparticles in solids, garnering significant attention. Recently, the existence of Weyl fermions/Weyl semimetal states, stemming from the macroscopic time-reversal […]

Speaker: William D. Ratcliff of NIST Title:  "Applications of Artificial Intelligence to Neutron Scattering” Abstract:  Neutron scattering is a versatile technique for studying the structure and dynamics of materials. Unfortunately, there are a limited number of neutron sources available in the world to perform scientific experiments. In this talk, I will discuss the use of […]

Host: Yaojun Zhang

Special Condensed Matter Seminar Speaker: Allen Scheie Title: "The old and the new: Probing elemental gadolinium and quantum entanglement with neutron scattering" Abstract: Doing experiments on quantum materials often not nearly as hard as interpreting those experiments. In this talk I discuss two projects where neutron scattering data was analyzed in a new way to […]

Title: New Pathways for Topological Flat Bands, and Roton Condensate in Fractional Quantum Anomalous Hall Systems   Abstract: Recent studies on topological flat bands in moiré superlattices have revealed fascinating new phenomena, such as the fractional quantum anomalous Hall effect (FQAH). In this talk, we will discuss  two interrelated topics: (1) new strategies for creating exact […]

Title: Moiré magnetism in twisted two-dimensional magnets Abstract: Moiré superlattice emerges from the interference between two mismatched atomic lattices, and it has led to tremendous success in designing and tailoring the electronic states in two-dimensional (2D) homo- and hetero-structures. Yet, the power of moiré superlattice in controlling the spin degree of freedom and thus modifying the magnetic states is much less […]

"Programmable Emulsions By Design" Presented by Jasna Brujic, a leading soft condensed matter experimentalist from NYU