Terahertz detection of in-situ switching between antiferromagnetic domains in the multiferroic Ba2CoGe2O7

J. Vı́t, 2, 3 J. Viirok, L. Peedu, T. Rõõm, U. Nagel, V. Kocsis, Y. Tokunaga, 6 Y. Taguchi, Y. Tokura, 7 I. Kézsmárki, 8 P. Balla, K. Penc, J. Romhányi, and S. Bordács 11 Department of Physics, Budapest University of Technology and Economics, 1111 Budapest, Hungary Institute of Physics ASCR, Na Slovance 2, 182 21 Prague 8, Czech Republic Faculty of Nuclear Science and Physical Engineering, Czech Technical University, Břehová 7, 115 19 Prague 1, Czech Republic National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8561, Japan Department of Applied Physics and Tokyo College, University of Tokyo, Tokyo 113-8656, Japan Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany Institute for Solid State Physics and Optics, Wigner Research Centre or Physics, PO Box. 49, H-1525 Budapest, Hungary Department of Physics and Astronomy, University of California, Irvine, 4129 Frederick Reines Hall, Irvine, CA,USA Hungarian Academy of Sciences, Premium Postdoctor Program, 1051 Budapest, Hungary (Dated: January 26, 2021)