Near room-temperature formation of a skyrmion crystal in thin-films of the helimagnet FeGe
Tóm tắt
Từ khóa
Tài liệu tham khảo
Rajaraman, R. Solitons and Instantons 115–123 (Elsevier, 1987).
Sondhi, S. L., Karlhede, A., Kivleson, S. A. & Rezayi, E. H. Skyrmions and the crossover from the integer to fractional quantum Hall-effect at small Zeeman energies. Phys. Rev. B 47, 16419–16426 (1993).
Bogdanov, A. N. & Yablonskiî, D. A. Thermodynamically stable ‘vortics’ in magnetically ordered crystals: The mixed state of magnets. Sov. Phys. JETP 68, 101–103 (1989).
Neubauer, A. et al. Topological Hall effect in the A phase of MnSi. Phys. Rev. Lett. 102, 186602 (2009).
Lee, M., Kang, W., Onose, Y., Tokura, Y. & Ong, N. P. Unusual Hall anomaly in MnSi under pressure. Phys. Rev. Lett. 102, 186601 (2009).
Yu, X. Z. et al. Real-space observation of a two-dimensional skyrmion crystal. Nature 465, 901–904 (2010).
Hsieh, D. et al. Observation of unconventional quantum spin textures in topological insulator. Science 323, 919–922 (2009).
Onoda, M., Tatara, G. & Nagaosa, N Anomalous Hall effect and skyrmion number in real and momentum spaces. J. Phys. Soc. Jpn 73, 2624–2627 (2004).
Binz, B. & Vishwanath, A. Chirality induced anomalous-Hall effect in helical spin crystals. Physica B 403, 1336–1360 (2008).
Yi, S. D., Onoda, S., Nagaosa, N. & Han, J. H. Skyrmions and anomalous Hall effect in a Dzyaloshinskii–Moriya spiral magnet. Phys. Rev. B 80, 054416 (2009).
Brataas, A., Bauer, G. E. W. & Kelly, P. J. Non-collinear magnetoelectronics. Phys. Rep. 427, 157–255 (2006).
Dzyaloshinsky, I. A thermodynamic theory of ‘weak’ ferromagnetism of antiferromagnetics. J. Phys. Chem. Solids 4, 241–255 (1958).
Moriya, T. Anisotropic superexchange interaction and weak ferromagnetism. Phys. Rev. 120, 91–98 (1960).
Grigoriev, S. V. et al. Crystal handedness and spin helix chirality in Fe1−xCoxSi. Phys. Rev. Lett. 102, 037204 (2009).
Ishikawa, Y., Tajima, K., Bloch, D. & Roth, M. Helical spin structure in manganese silicide MnSi. Solid State Commun. 19, 525–528 (1976).
Tanaka, M., Takayoshi, H., Ishida, M. & Endoh, Y. Crystal chirality and helicity of the helical spin density wave in MnSi I. Convergent-beam electron diffraction. J. Phys. Soc. Jpn 54, 2970–2974 (1985).
Lebech, B., Bernhard, J. & Freltoft, T. Magnetic structures of cubic FeGe studied by small-angle neutron scattering. J. Phys. Condens. Matter 1, 6105–6122 (1989).
Rößler, U. K., Bogdanov, A. N. & Pfleiderer, C. Spontaneous skyrmion ground states in magnetic metals. Nature 442, 797–801 (2006).
Ishizuka, K. & Allman, B. Phase measurement of atomic resolution image using transport of intensity equation. J. Electron Microsc. 54, 191–197 (2005).
Uchida, M., Onose, Y., Matsui, Y. & Tokura, Y. Real-space observation of helical spin order. Science 311, 359–361 (2006).