Zobrazeno 1 - 10
of 210
pro vyhledávání: '"Máca, F."'
Autor:
Carva, K., Baláž, P., Šebesta, J., Turek, I., Kudrnovský, J., Máca, F., Drchal, V., Chico, J., Sechovský, V., Honolka, J.
Publikováno v:
Phys. Rev. B 101, 054428 (2020)
Doping Bi$_2$Se$_3$ by magnetic ions represents an interesting problem since it may break the time reversal symmetry needed to maintain the topological insulator character. Mn dopants in Bi$_2$Se$_3$ represent one of the most studied examples here. H
Externí odkaz:
http://arxiv.org/abs/2001.04366
The high-entropy alloys Al$_{x}$CrFeCoNi exist over a broad range of Al concentrations ($0 < x < 2$). With increasing Al content their structure is changed from the fcc to bcc phase. We investigate the effect of such structural changes on transport p
Externí odkaz:
http://arxiv.org/abs/1907.09731
The antiferromagnetic (AFM) CuMnAs alloy with tetragonal structure is a promising material for the AFM spintronics. The resistivity measurements indicate the presence of defects about whose types and concentrations is more speculated as known. We con
Externí odkaz:
http://arxiv.org/abs/1809.06239
Electronic, magnetic, and transport properties of the antiferromagnetic (AFM) CuMnAs alloy with tetragonal structure, promising for the AFM spintronics, are studied from first principles using the Vienna ab-initio simulation package. We investigate t
Externí odkaz:
http://arxiv.org/abs/1708.06916
Autor:
Maca, F., Kudrnovsky, J., Drchal, V., Turek, I., Stelmakhovych, O., Beran, P., Llobet, A., Marti, X.
Ab initio total energy calculations show that the antiferromagnetic (111) order is not the ground state for the ideal CuMnSb Heusler alloy in contrast to the results of neutron diffraction experiments. It is known, that Heusler alloys usually contain
Externí odkaz:
http://arxiv.org/abs/1606.04238
Autor:
Carva, K., Kudrnovský, J., Máca, F., Drchal, V., Turek, I., Baláž, P., Tkáč, V., Holý, V., Sechovský, V., Honolka, J.
Publikováno v:
Phys. Rev. B 93, 214409 (2016)
We present a first-principles study of the electronic, magnetic, and transport properties of the topological insulator Bi$_{2}$Te$_{3}$ doped with Mn atoms in substitutional (Mn$_{\rm Bi}$) and interstitial van der Waals gap positions (Mn$_{\rm i}$),
Externí odkaz:
http://arxiv.org/abs/1603.08811
Autor:
Wadley, P., Novák, V., Campion, R. P., Rinaldi, C., Martí, X., Reichlová, H., Zelezný, J., Gazquez, J., Roldan, M. A., Varela, M., Khalyavin, D., Langridge, S., Kriegner, D., Máca, F., Masek, J., Bertacco, R., Holy, V., Rushforth, A. W., Edmonds, K. W., Gallagher, B. L., Foxon, C. T., Wunderlich, J., Jungwirth, T.
Publikováno v:
Nat. Commun. 4:2322
Recent studies have demonstrated the potential of antiferromagnets as the active component in spintronic devices. This is in contrast to their current passive role as pinning layers in hard disk read heads and magnetic memories. Here we report the ep
Externí odkaz:
http://arxiv.org/abs/1402.3624
Autor:
Maca, F., Masek, J., Stelmakhovych, O., Marti, X., Uhlirova, K., Beran, P., Reichlova, H., Wadley, P., Novak, V., Jungwirth, T.
We report on a theoretical and experimental study of CuMn-V antiferromagnets. Previous works showed low-temperature antiferomagnetism and semimetal electronic structure of the semi-Heusler CuMnSb. In this paper we present theoretical predictions of h
Externí odkaz:
http://arxiv.org/abs/1102.5373
Autor:
Kopecky, M., Kub, J., Maca, F., Masek, J., Pacherova, O., Gallagher, B. L., Campion, R. P., Novak, V., Jungwirth, T.
We report high resolution x-ray diffraction measurements of (Ga,Mn)As and (Ga,Mn)(As,P) epilayers. We observe a structural anisotropy in the form of stacking faults which are present in the (111) and (11-1) planes and absent in the (-111) and (1-11)
Externí odkaz:
http://arxiv.org/abs/1012.4690
Autor:
Masek, J., Maca, F., Kudrnovsky, J., Makarovsky, O., Eaves, L., Campion, R. P., Edmonds, K. W., Rushforth, A. W., Foxon, C. T., Gallagher, B. L., Novak, V., Sinova, Jairo, Jungwirth, T.
We analyze microscopically the valence and impurity band models of ferromagnetic (Ga,Mn)As. We find that the tight-binding Anderson approach with conventional parameterization and the full potential LDA+U calculations give a very similar picture of s
Externí odkaz:
http://arxiv.org/abs/1007.4704