EventDetails

Speaker:
Dr. Isabella Gierz, MPI Hamburg

Dynamical modulation with light has recently emerged as a new tool for electronic structure control, complementing more traditional routes such as chemistry, confinement, pressure, or magnetic fields. Famous examples include light-induced superconductivity in cuprates1 and K3C602 far above the equilibrium critical temperature using resonant excitation of the crystal lattice, as well as the formation of photon-dressed Floquet-Bloch states inducing a topological phase transition in Bi2Se33.

I combine femtosecond excitation at tunable wavelengths from the near- to the mid-infrared spectral regime with an extreme-ultraviolet time- and angle-resolved photoemission probe for the electronic structure control of various low-dimensional solids. I will present our recent results on Dirac carrier dynamics in driven monolayer and bilayer graphene4-7, and give an outlook on ongoing and future projects on other low-dimensional material systems.

1Hu et al., Nature Materials 13, 705 (2014)

2Mitrano et al., Nature 530, 461 (2016)

3Wang et al. Science 342, 453 (2013)

4Gierz et al., Nat. Mater. 12, 1119 (2013)

5Gierz et al., Phys. Rev. Lett. 114, 125503 (2015)

6Gierz et al., Phys. Rev. Lett. 115, 086803 (2015)

7Pomarico et al., arXiv1607.02314 (2016)