Concept
Resonating valence bond theory
Publications associées (40)
Ab Initio Electron-Phonon Interactions in Correlated Electron Systems
Nicola Marzari, Iurii Timrov, Matteo Cococcioni, Andrea Floris
Electron-phonon (e-ph) interactions are pervasive in condensed matter, governing phenomena such as transport, superconductivity, charge-density waves, polarons, and metal-insulator transitions. First-principles approaches enable accurate calculations of e- ...
AMER PHYSICAL SOC2021Tunneling processes through magnetic impurities on superconducting surfaces: Yu-Shiba-Rusinov states and the Josephson effect
Magnetic impurities generate a wealth of phenomena on surfaces. On metals, conducting electrons screen the magnetic moment giving rise to the Kondo effect. On superconductors, the Yu-Shiba-Rusinov (YSR) states emerge inside the superconducting gap due to t ...
EPFL2021From quantum spin chains to square lattice Heisenberg anti-ferromagnets
This thesis presents a theoretical study of the Heisenberg model on a two dimensional lattice with asymmetric couplings along x and y directions.
By gradually varying the coupling along y-direction we traverse the 1D, quasi 1D and 2D domains of this model. ...
EPFL2019Kondo lattice excitation observed using resonant inelastic x-ray scattering at the YbM5 edge
Marco Grioni, Thorsten Schmitt, Marco Guarise
We present a study of the resonant inelastic scattering response of YbInCu4 excited at the tender YbM5 x-ray edge. In the high-temperature, paramagnetic phase, we observe a multiplet structure which can be understood at an ionic level. Upon cooling through ...
AMER PHYSICAL SOC2018Magnons in tetragonal CuO
Henrik Moodysson Rønnow, Frédéric Mila, Marco Grioni, Thorsten Schmitt, Simon Karl Moser, Bastien Dalla Piazza, Sara Fatale, Noore Elahi Shaik
We investigate by resonant inelastic x-ray scattering the magnetic excitations in thin films of tetragonal CuO. We identify a spin wave excitation, dispersing on two cupratelike antiferromagnetic sublattices. Its energy at the boundary of the Brillouin zon ...
2015Optical properties of V2O3 in its whole phase diagram
Vanadium sesquioxide V2O3 is considered a textbook example of Mott-Hubbard physics. In this paper, we present an extended optical study of its whole temperature/doping phase diagram as obtained by doping the pure material with M = Cr or Ti atoms (V1-x M-x) ...
Amer Physical Soc2015