Unusual Bi-209 NMR quadrupole effects in topological insulator Bi2Se3
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10406518" target="_blank" >RIV/00216208:11320/19:10406518 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=DF82mcCS.H" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=DF82mcCS.H</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jmr.2019.03.008" target="_blank" >10.1016/j.jmr.2019.03.008</a>
Alternative languages
Result language
angličtina
Original language name
Unusual Bi-209 NMR quadrupole effects in topological insulator Bi2Se3
Original language description
Three-dimensional topological insulators are an important class of modern materials, and a strong spin-orbit coupling is involved in making the bulk electronic states very different from those near the surface. Bi2Se3 is a model compound, and Bi-209 NMR is employed here to investigate the bulk properties of the material with focus on the quadrupole splitting. It will be shown that this splitting measures the energy band inversion induced by spin-orbit coupling in quantitative agreement with first-principle calculations. Furthermore, this quadrupole interaction is very unusual as it can show essentially no angular dependence, e.g., even at the magic angle the first-order splitting remains. Therefore, it is proposed that the magnetic field direction is involved in setting the quantization axis for the electrons, and that their life time leads to a new electronically driven relaxation mechanism, in particular for quadrupolar nuclei like Bi-209. While a quantitative understanding of these effects cannot be given, the results implicate that NMR can become a powerful tool for the investigation of such systems.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Magnetic Resonance
ISSN
1090-7807
e-ISSN
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Volume of the periodical
302
Issue of the periodical within the volume
May
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
34-42
UT code for WoS article
000468145800005
EID of the result in the Scopus database
2-s2.0-85063755998