Description
Chair: M. Wolf
Ekaterina Vorobeva
(Paul Scherrer Institute)
05/04/2011, 15:20
Talk
Recent developments in time resolved techniques such as angle resolved photo emission Spectroscopy and x-ray diffraction have opened new opportunities to probe directly dynamics of the electronic and structural order on femtosecond time-scales. Charge Density Waves (CDW) comprise a class of collective phenomena arising from a correlation between the electron density and the underlying...
Rob Moore
(SLAC National Accelerator Lab.)
05/04/2011, 15:40
Talk
TbTe3 is a model system that exhibits a two dimensional incommensurate charge density wave state due to the Fermi surface nesting. Ultrafast pump-probe dynamics of the CDW state in such system has attracted significant interest in the field. Although coherent phonon mode and the amplitude mode, a collective excitation of the CDW sate, has been observed by time-resolved pump-probed reflectivity...
Jure Demsar
(Universität Konstanz, FB Physik, D-78457 Konstanz)
05/04/2011, 16:00
Talk
Numerous advanced materials, like e.g. high-temperature-superconductors or colossal magneto-resistance compounds, owe their unique macroscopic properties to the existence of a delicate balance among different interactions on nanoscale. Thus, the study of interplay between various degrees of freedom in such system is crucial for their understanding. Charge-Density-Wave (CDW) systems , with...
Jesse Petersen
(Oxford University)
05/04/2011, 16:20
Invited talk
Charge density waves (CDWs) underpin the electronic properties of many complex materials. When electrons are uncorrelated, CDW order is driven by the electron-phonon interaction alone, producing linearly coupled lattice and charge-density modulations whose dynamics are understood in terms of collective amplitude and phase modes. However, if electronic correlations dominate, lattice and charge...
