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Role of spin in quasiparticle interference

MPS-Authors
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Pascual,  Jose I.
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Rust,  Hans-Peter
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Ceballos,  Gustavo
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Hansmann,  Martin
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Horn,  Karsten
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Fulltext (public)

0407564v1.pdf
(Preprint), 206KB

e196802.pdf
(Publisher version), 528KB

Supplementary Material (public)
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Citation

Pascual, J. I., Bihlmayer, G., Koroteev, Y. M., Rust, H.-P., Ceballos, G., Hansmann, M., et al. (2004). Role of spin in quasiparticle interference. Physical Review Letters, 93(19): 196802. doi:10.1103/PhysRevLett.93.196802.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-0AFA-1
Abstract
Quasiparticle interference patterns measured by scanning tunneling microscopy can be used to study the local electronic structure of metal surfaces and high-temperature superconductors. Here, we show that even in nonmagnetic systems the spin of the quasiparticles can have a profound effect on the interference patterns. On Bi(110), where the surface state bands are not spin degenerate, the patterns are not related to the dispersion of the electronic states in a simple way. In fact, the features which are expected for the spin-independent situation are absent and the observed interference patterns can be interpreted only by taking spin-conserving scattering events into account.