Hedgehog spin texture and Berry's phase tuning in a magnetic topological insulator. Xu, S., Neupane, M., Liu, C., Zhang, D., Richardella, A., Andrew Wray, L., Alidoust, N., Leandersson, M., Balasubramanian, T., Sánchez-Barriga, J., Rader, O., Landolt, G., Slomski, B., Hugo Dil, J., Osterwalder, J., Chang, T., Jeng, H., Lin, H., Bansil, A., Samarth, N., & Zahid Hasan, M. Nature Physics, 8(8):616–622, 2012. ![Hedgehog spin texture and Berry's phase tuning in a magnetic topological insulator [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Understanding and control of spin degrees of freedom on the surfaces of topological materials are key to future applications as well as for realizing novel physics such as the axion electrodynamics associated with time-reversal (TR) symmetry breaking on the surface. We experimentally demonstrate magnetically induced spin reorientation phenomena simultaneous with a Dirac-metal to gapped-insulator transition on the surfaces of manganese-doped Bi2Se3 thin films. The resulting electronic groundstate exhibits unique hedgehog-like spin textures at low energies, which directly demonstrate the mechanics of TR symmetry breaking on the surface. We further show that an insulating gap induced by quantum tunnelling between surfaces exhibits spin texture modulation at low energies but respects TR invariance. These spin phenomena and the control of their Fermi surface geometrical phase first demonstrated in our experiments pave the way for the future realization of many predicted exotic magnetic phenomena of topological origin.
@article{xu_hedgehog_2012,
title = {Hedgehog spin texture and {Berry}'s phase tuning in a magnetic topological insulator},
volume = {8},
copyright = {© 2012 Nature Publishing Group},
issn = {1745-2473},
url = {http://www.nature.com/nphys/journal/v8/n8/full/nphys2351.html},
doi = {10.1038/nphys2351},
abstract = {Understanding and control of spin degrees of freedom on the surfaces of topological materials are key to future applications as well as for realizing novel physics such as the axion electrodynamics associated with time-reversal (TR) symmetry breaking on the surface. We experimentally demonstrate magnetically induced spin reorientation phenomena simultaneous with a Dirac-metal to gapped-insulator transition on the surfaces of manganese-doped Bi2Se3 thin films. The resulting electronic groundstate exhibits unique hedgehog-like spin textures at low energies, which directly demonstrate the mechanics of TR symmetry breaking on the surface. We further show that an insulating gap induced by quantum tunnelling between surfaces exhibits spin texture modulation at low energies but respects TR invariance. These spin phenomena and the control of their Fermi surface geometrical phase first demonstrated in our experiments pave the way for the future realization of many predicted exotic magnetic phenomena of topological origin.},
language = {en},
number = {8},
urldate = {2015-04-15},
journal = {Nature Physics},
author = {Xu, Su-Yang and Neupane, Madhab and Liu, Chang and Zhang, Duming and Richardella, Anthony and Andrew Wray, L. and Alidoust, Nasser and Leandersson, Mats and Balasubramanian, Thiagarajan and Sánchez-Barriga, Jaime and Rader, Oliver and Landolt, Gabriel and Slomski, Bartosz and Hugo Dil, Jan and Osterwalder, Jürg and Chang, Tay-Rong and Jeng, Horng-Tay and Lin, Hsin and Bansil, Arun and Samarth, Nitin and Zahid Hasan, M.},
year = {2012},
keywords = {Condensed-matter physics, Electronics, photonics and device physics},
pages = {616--622},
}
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