Abstract Bovensiepen

Ultrafast changes in the electronic structure of solids investigated by time- and angle-resolved photoemission spectroscopy


Uwe Bovensiepen

University Duisburg-Essen



Optically excited states in solid materials exhibit ultrafast relaxation due to coupling of the excited states to further electronic and vibrational excitations. Therefore, analysis of these excited states directly in the time domain bear the potential to provide novel insight into fundamental interactions like e-e and e-ph interactions. The involved time scales, i.e. the inverse scattering rates, are determined by the respective coupling strength and are typically in the femtosecond regime [1,2]. This talk discusses recent results obtained on the charge density wave compound RTe_3 and on cuprates Bi-2212, which highlight the importance of e-ph coupling and electronic excitations for these two classes of materials, respectively.


[1] U. Bovensiepen and P. S. Kirchmann, Laser Photonics Rev. 6,
589(2012)
[2] U. Bovensiepen, H. Petek, M. Wolf (eds.), Dynamics at Solid
State Surfaces and Interfaces: Volume 1, 2; Wiley-VCH, Weinheim,
Germany