Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 7: Micro- and Nanostructured Materials (joint session MA/TT)

TT 7.4: Vortrag

Montag, 16. März 2020, 10:15–10:30, HSZ 403

Giant Photovoltaic Effect in Magnetic Materials — •Oles Matsyshyn and Inti Sodemann — MPI PKS, Dresden, Germany

We investigate a rectification process present in materials that break both inversion and time reversal symmetries. At second order in electric fields, this effect is inverseley proportional to the relaxation rate, and, therefore, the rectified current would be infinity in a "naive" ideal clean and zero temperature limit. Employing Floquet theory, we show, however, that there is a non-perturbative correction in the electric field strength that regularises this divergence, but, which ultimately leads to a giant photo-current generation. Therefore, this effect offers a promising alternative paradigm for solar cell technologies.