Spin Fluctuations at the Surface of Strongly Correlated Topological Insulator SmB6

The low temperature ( T  < 5 K) electron spin resonance in topological Kondo insulator SmB 6 is investigated. It is shown that spin relaxation time of the paramagnetic centers responsible for low temperature electron spin resonance in SmB 6 is about ~ 10 −8  s, which exceeds by five orders of mag...

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Published inApplied magnetic resonance Vol. 51; no. 1; pp. 71 - 84
Main Authors Demishev, S. V., Gilmanov, M. I., Samarin, A. N., Semeno, A. V., Sluchanko, N. E., Samarin, N. A., Bogach, A. V., Shitsevalova, N. Yu, Filipov, V. B., Karasev, M. S., Glushkov, V. V.
Format Journal Article
LanguageEnglish
Published Vienna Springer Vienna 2020
Springer Nature B.V
Subjects
Atoms and Molecules in Strong Fields
Dependence
Electron paramagnetic resonance
Electron spin
Electrons
Laser Matter Interaction
Low temperature
Organic Chemistry
Original Paper
Physical Chemistry
Physics
Physics and Astronomy
Relaxation time
Solid State Physics
Spectroscopy/Spectrometry
Spectrum analysis
Spin resonance
Temperature
Topological insulators
Valence
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Summary:The low temperature ( T  < 5 K) electron spin resonance in topological Kondo insulator SmB 6 is investigated. It is shown that spin relaxation time of the paramagnetic centers responsible for low temperature electron spin resonance in SmB 6 is about ~ 10 −8  s, which exceeds by five orders of magnitude the widely accepted spin and charge fluctuation time ~ 10 −13  s in the homogeneous mixed valence state of this material. This discrepancy may be attributed to the formation of the specific paramagnetic centers in the sample surface–spin polarons.
ISSN:0937-9347
1613-7507
DOI:10.1007/s00723-019-01175-z