Zobrazeno 1 - 10
of 379
pro vyhledávání: '"OLEJNIK, K."'
Autor:
Surynek, M., Zubac, J., Olejnik, K., Farkas, A., Krizek, F., Nadvornik, L., Kubascik, P., Trojanek, F., Campion, R. P., Novak, V., Jungwirth, T., Nemec, P.
Previous experiments in compensated magnets have demonstrated a potential for approaching the limit of fastest and least-dissipative operation of digital memory bits. However, the analog route has been virtually unexplored at (sub)ps time scales. In
Externí odkaz:
http://arxiv.org/abs/2401.17370
Autor:
Schumann, T., Kleinke, T., Braun, L., Meyer, N., Mussler, G., Kampmeier, J., Grützmacher, D., Schmoranzerova, E., Olejník, K., Reichlová, H., Heiliger, C., Denker, C., Walowski, J., Kampfrath, T., Münzenberg, M.
We study laser driven spin-current effects at ferromagnet/topological-insulator interfaces by two complementary experimental approaches. The DC photocurrent is studied in ferromagnet/topological-insulator bilayers with high spatial resolution. Dynami
Externí odkaz:
http://arxiv.org/abs/2202.01522
Autor:
Betancourt, R. D. Gonzalez, Zubáč, J., Gonzalez-Hernandez, R. J., Geishendorf, K., Šobáň, Z., Springholz, G., Olejník, K., Šmejkal, L., Sinova, J., Jungwirth, T., Goennenwein, S. T. B., Thomas, A., Reichlová, H., Železný, J., Kriegner, D.
Publikováno v:
Phys. Rev. Lett. 130, 036702 (2023)
The anomalous Hall effect, commonly observed in metallic magnets, has been established to originate from the time-reversal symmetry breaking by an internal macroscopic magnetization in ferromagnets or by a non-collinear magnetic order. Here we observ
Externí odkaz:
http://arxiv.org/abs/2112.06805
Autor:
Heitz, J. J. F., Nádvorník, L., Balos, V., Behovits, Y., Chekhov, A. L., Seifert, T. S., Olejník, K., Kašpar, Z., Geishendorf, K., Novák, V., Campion, R. P., Wolf, M., Jungwirth, T., Kampfrath, T.
We show scalable and complete suppression of the recently reported terahertz-pulse-induced switching between different resistance states of antiferromagnetic CuMnAs thin films by ultrafast gating. The gating functionality is achieved by an optically
Externí odkaz:
http://arxiv.org/abs/2106.08828
Autor:
Železný, J., Fang, Z., Olejník, K., Patchett, J., Gerhard, F., Gould, C., Molenkamp, L. W., Gomez-Olivella, C., Zemen, J., Tichý, T., Jungwirth, T., Ciccarelli, C.
Publikováno v:
Phys. Rev. B 104, 054429 (2021)
Spin-dependent transport phenomena due to relativistic spin-orbit coupling and broken space-inversion symmetry are often difficult to interpret microscopically, in particular when occurring at surfaces or interfaces. Here we present a theoretical and
Externí odkaz:
http://arxiv.org/abs/2102.12838
Autor:
Wörnle, M. S., Welter, P., Kašpar, Z., Olejník, K., Novák, V., Campion, R. P., Wadley, P., Jungwirth, T., Degen, C. L., Gambardella, P.
Electrical and optical pulsing allow for manipulating the order parameter and magnetoresistance of antiferromagnets, opening novel prospects for digital and analog data storage in spintronic devices. Recent experiments in CuMnAs have demonstrated gia
Externí odkaz:
http://arxiv.org/abs/1912.05287
Autor:
Wang, M., Andrews, C., Reimers, S., Amin, O. J., Wadley, P., Campion, R. P., Poole, S. F., Felton, J., Edmonds, K. W., Gallagher, B. L., Rushforth, A. W., Makarovsky, O., Gas, K., Sawicki, M., Kriegner, D., Zubac, J., Olejnik, K., Novak, V., Jungwirth, T., Shahrokhvand, M., Zeitler, U., Dhesi, S. S., Maccherozzi, F.
Publikováno v:
Phys. Rev. B 101, 094429 (2020)
Recent research works have shown that the magnetic order in some antiferromagnetic materials can be manipulated and detected electrically, due to two physical mechanisms: Neel-order spin-orbit torques and anisotropic magnetoresistance. While these ob
Externí odkaz:
http://arxiv.org/abs/1911.12381
Autor:
Godinho, J., Reichlova, H., Kriegner, D., Novak, V., Olejnik, K., Kaspar, Z., Soban, Z., Wadley, P, Campion, R. P., Otxoa, R. M., Roy, P. E., Zelezny, J., Jungwirth, T., Wunderlich, J.
Electrical detection of the 180 deg spin reversal, which is the basis of the operation of ferromagnetic memories, is among the outstanding challenges in the research of antiferromagnetic spintronics. Analogous effects to the ferromagnetic giant or tu
Externí odkaz:
http://arxiv.org/abs/1806.02795
Autor:
Olejnik, K., Seifert, T., Kaspar, Z., Novak, V., Wadley, P., Campion, R. P., Baumgartner, M., Gambardella, P., Nemec, P., Wunderlich, J., Sinova, J., Muller, M., Kampfrath, T., Jungwirth, T.
The speed of writing of state-of-the-art ferromagnetic memories is physically limited by an intrinsic GHz threshold. Recently, an alternative research direction has been initiated by realizing memory devices based on antiferromagnets in which spin di
Externí odkaz:
http://arxiv.org/abs/1711.08444
Autor:
Nádvorník, L., Surýnek, M., Olejník, K., Novák, V., Wunderlich, J., Trojánek, F., Jungwirth, T., Němec, P.
Publikováno v:
Phys. Rev. Applied 8, 034022 (2017)
We report on a picosecond-fast optical removal of spin polarization from a self-confined photo-carrier system at an undoped GaAs/AlGaAs interface possessing superior long-range and high-speed spin transport properties. We employed a modified resonant
Externí odkaz:
http://arxiv.org/abs/1705.10627