Host: Peter Armitage BaCoS2 and BaNiS2 are the end members of a solid solution that shows a vast array of quantum properties. The Co material is a strongly correlated insulator with an antiferromagnetic transition, as well as a structural phase transition, around room temperature. At 28% Ni doping this material undergoes an electronic metal-insulator phase […]
Host: Peter Armitage“Floquet engineering” - designing band structures “on-demand" through an application of coherent time-periodic drives, has recently emerged as a powerful tool for inducing exotic phenomena in ordinary materials. In this talk, I will discuss the application of Floquet engineering for inducing novel non-equilibrium phases of matter in steady states of time-periodically driven semiconductors. […]
Polar and nematic states drive 3D pattern formation in the bacterium Myxococcus xanthus. Abstract: The soil dwelling bacterium Myxococcus xanthus is an amazing organism that uses collective motility to hunt in giant packs when near prey and to form beautiful and protective macroscopic structures comprising millions of cells when food is scarce. I will present […]
Host: Oleg Tchernyshyov Transporting the shape of spin: from spintronics to multipoletronics Significant developments in spintronics over the past decades have established that electron spin can be transported and manipulated by electrical means. The mechanisms of these processes are often captured qualitatively by treating spin as a conserved quantity. However, in materials that exhibit strong […]
Abstract: Infrared magnetospectroscopy is a useful probe of correlated electron physics in graphene (although this is not true for 2D electron systems in general). We have studied Landau level transitions in both mono- and bilayer graphene, and generally find departures from what is expected in a single particle picture. Bilayer graphene offers an intriguing set […]
“Physics in high magnetic fields: Landau level spectroscopy of topological semimetals” Host: Peter Armitage
Speaker: Jiaqi Cai, University of Washington JHU Host: Yahui Zhang
Host: Yahui Zhang
Host: Dan Beller Controlling chaotic advection in 2D active nematicsRecent years have seen a surge of interest in active materials, in which energy injected at the microscale gives rise to mesoscale coherent motion. One prominent example is an active 2D "liquid crystal" composed of microtubules in the nematic phase. The activity is generated by molecular […]
Strong correlation effects are believed to be the driving force behind many novel quantum phases and exotic phenomena, such as strange metallicity. They become pronounced when the electrostatic repulsive interaction is larger than, or at least comparable to the kinetic energy. This regime naturally materializes in f-electron-based heavy fermion metals, as well as in d-electron-based […]