200 likes | 362 Views
Charge. Long-range magnetic order. Boston Feb2012. Grown on. Implemented by. Coupling. Metals: AMR,GMR Semiconductors Insulators. Standard substrates Room temperature. Institute of Physics (Prague) – University Nottingham COBRA Inter-University Eindhoven -ORNL.
E N D
Charge Long-range magnetic order Boston Feb2012 Grown on Implemented by Coupling Metals: AMR,GMR Semiconductors Insulators Standard substrates Room temperature Institute of Physics (Prague) – University Nottingham COBRA Inter-University Eindhoven -ORNL Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks
GaAs (Ga,Mn)As MnAs Semiconductor Ferromagnetic Doping Temperature Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks
Intrinsic III-V and II-VI semiconductors Maca et al., JMMM 324, 1606 (2012) Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks
Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks Large moment Large SOC Large moment Large moment Large SOC Large moment Schick et al., PRB 81, 212409 (2010)
Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks T15 Room 213 Helena Reichlova Large moment Large SOC Large moment Large moment Large SOC Large moment Schick et al., PRB 81, 212409 (2010)
Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks Large moment Large SOC Large moment Large moment Large SOC Large moment Schick et al., PRB 81, 212409 (2010)
Crystal and magnetic structure: Bronger et al, Z. anorg. allg. Chem. 539, 175 (1986) • THEORY • Semiconductor with huge spin-orbit coupling Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks
THIN FILM EPILAYERS 4.27A 4.28A In As V. Novak, et al., J. Cryst. Growth 323, 348 (2011)
THIN FILM EPILAYERS log(intensity) 4.27A 4.28A In As
Li Mn As LiMnAs has a bandgap dI/dV map 4.27A 4.28A In As I. Wijnheijmer et al, Appl. Phys. Lett. In press
Is LiMnAs the only choice available? Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks
RT TN V. M. Ryzhkovsky, et al., Inorg. Mater. 32 117 (1995) A.E. Austin, et al., J. Appl. Phys. 33 1356 (1962) Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks
_ [110] CuMnAs grown on GaAs [110] Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks
CuMnAs grown on GaAs a = b = 5.407 Å c = 6.313 Å GaAs, a = 5.65 Å c a b Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks
TEM: JaumeGazquez, Oak Ridge NL Growth: R. Campion, Nottingham Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks
TEM: JaumeGazquez, Oak Ridge NL Growth: R. Campion, Nottingham CuMnAs GaAs Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks
Fe 10 nm GaAs 300 K Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks
Fe CuMnAs 300 K GaAs Fe/CuMnAs exchange bias Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks
CuMnAs grown on GaAs Fe CuMnAs 300 K GaAs Fe/CuMnAs exchange bias Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks
Thanks for your attention LiMnAs CuMnAs Prague : P. Wadley, H. Reichlova, M. Cukr, F. Maca, A.B. Shick, J. Masek, P. Horodyska, P. Nemec, V. Holy, J. Zemen, P. Kuzel, I. Nemec, K. Olejnik, J. Wunderlich, O. Stelmakhovych, K. Ulrihova, P. Beran, V. Novak, T. Jungwirth Nottingham : R. Campion, K. Edmonds, B. Gallagher, C.T. Foxon Eindhoven : I. Wijnheijmer, P. Koenraad ORNL: J. Gazquez, M. Varela Xavier Marti, xavi.mr@gmail.com http://usuaris.tinet.cat/xmarti/talks