Speaker: Janez Bonca, University of Ljubljana Time: 10:00-11:00am Location: BRIM 311 Abstract: We use density matrix renormalization group (DMRG) and variational exact diagonalization (VED) to calculate the single-electron removal spectral weight for the Hubbard-Holstein model at low electron densities. Tuning the strength of the electron-phonon coupling and of the Hubbard repulsion allows us to contrast the […]

Speaker: Jie Shan, Cornell University Time: 10:00-11:00am Location: BRIM 311 Topic: Electron-hole atomic double layers: towards high-temperature exciton condensation Abstract: Excitons, bound electron-hole pairs, in semiconductors are bosons that can form condensates. With a much smaller mass than atoms, they have been predicted to condense at a much higher temperature scale. Although the concept has been […]

Speaker: Charles Marcus, University of Washington Time: 10:00-11:00am Location: BRIM 311 Abstract: Hybrid superconductors-semiconductor heterostructures allow voltage control of carrier density in superconducting systems. We use these materials to investigate novel gate-controlled arrays of Josephson junctions in a variety of geometries, examining the interplay of quantum coherence, Coulomb interaction, and frustration. Using the example of the […]