Marco Guarise

Cette personne n’est plus à l’EPFL

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Publications associées (26)

Opening of a Peierls gap in BaVS3 probed by V L-3 edge resonant inelastic x-ray scattering

Helmuth Berger, Marco Grioni, Marco Guarise, Thorsten Schmitt

V L-3 edge resonant inelastic x-ray scattering measurements performed on high quality BaVS3 single crystals reveal that the intra-t(2g) dd excitations close to the elastic peak are suppressed below the metal-insulator transition induced by the Peierls inst ...

Iop Publishing Ltd2013

Unified one-band Hubbard model for magnetic and electronic spectra of the parent compounds of cuprate superconductors

Helmuth Berger, Marco Grioni, Bastien Dalla Piazza, Martin Mourigal, Henrik Moodysson Rønnow, Marco Guarise, Thorsten Schmitt

Using low-energy projection of the one-band t-t′-t′′ Hubbard model we derive an effective spin Hamiltonian and its spin-wave expansion to order 1/S. We fit the spin-wave dispersion of several parent compounds to the high-temperature superconducting cuprate ...

American Physical Society2012

Electronic and Magnetic Resonant Inelastic X-ray Study of Cuprates

Marco Guarise

More than twenty five years have passed since the discovery of the first copper oxide based superconductor La2-xBaxCuO4 in 1986, and the intriguing physics of cuprates superconductors continues to fascinate and challenge scientists from all over the world. ...

EPFL2012

Energy and symmetry of dd excitations in undoped layered cuprates measured by Cu L-3 resonant inelastic x-ray scattering

Helmuth Berger, Marco Grioni, Marco Guarise, Thorsten Schmitt

We measured the high-resolution Cu L-3 edge resonant inelastic x-ray scattering (RIXS) of undoped cuprates La2CuO4, Sr2CuO2Cl2, CaCuO2 and NdBa2Cu3O6. The dominant spectral features were assigned to dd excitations and we extensively studied their polarizat ...

Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft2011

Measurement of Magnetic Excitations in the Two-Dimensional Antiferromagnetic Sr2CuO2Cl2 Insulator Using Resonant X-Ray Scattering: Evidence for Extended Interactions

Helmuth Berger, Marco Grioni, Bastien Dalla Piazza, Ping-Hui Lin, Peng Xu, Henrik Moodysson Rønnow, Marco Guarise, Thorsten Schmitt, Dirk Van der Marel

We measured the momentum dependence of magnetic excitations in the model spin-1/2 2D antiferromagnetic insulator Sr2CuO2Cl2 (SCOC). We identify a single-spin-wave feature and a multimagnon continuum, with different polarization dependences. The spin waves ...

American Physical Society2010

Evidence for core-hole-mediated inelastic x-ray scattering from metallic Fe1.087Te

Marco Grioni, Ping-Hui Lin, Henrik Moodysson Rønnow, Marco Guarise, Thorsten Schmitt, Dirk Van der Marel

We present a detailed analysis of resonant inelastic x-ray scattering from Fe1.087Te with unprecedented energy resolution. In contrast to the sharp peaks typically seen in insulating systems at the transition-metal L-3 edge, we observe spectra which show d ...

2010

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