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Tomas Jungwirth and colleagues have studied theoretically the optical properties of CuMnAs  that can be explored via optical and photoemission spectroscopy.

Veis, J. Minar, G. Steciuk, L. Palatinus, C. Rinaldi, M. Cantoni, D. Kriegner, K.K. Tikuisis, J. Hamrle, M. Zahradnik, R. Antos, J. Zelezny, L. Smejkal, P. Wadley, R.P. Campion, C. Frontera, K. Uhlirova, T. Duchon, P. Kuzel, V. Novak, T. Jungwirth, K. Vyborny:
Band structure of CuMnAs probed by optical and photoemission spectroscopy. 

Fellow members of the ASPIN group Tobias Kampfrath , Petr Nemec, Jairo Sinova, and Tomas Jungwirth and collaborators, have shown for the first time that CuMnAs can achieve writing speeds of THz’s via the Neel spin-orbit torque.

Olejnik, T. Seifert, Z. Kaspar, V. Novak, P. Wadley, R.P. Campion, M. Baumgartner, P. Gambardella, P. Nemec, J. Wunderlich, J. Sinova, M. Muller, T. Kampfrath, T. Jungwirth:
THz electrical writing speed in an antiferromagnetic memory.