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Low-temperature magnetic fluctuations in the Kondo insulator SmB6
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Biswas, P. K. (Pabitra K.), Salman, Zaher, Neupert, T., Morenzoni, E., Pomjakushina, E., von Rohr, F., Conder, K., Balakrishnan, Geetha, Ciomaga Hatnean, Monica, Lees, Martin R., Paul, Don McK., Schilling, A., Baines, C., Luetkens, H., Khasanov, R. and Amato, A. (2014) Low-temperature magnetic fluctuations in the Kondo insulator SmB6. Physical Review B (Condensed Matter and Materials Physics), Volume 89 (Number 16). doi:10.1103/PhysRevB.89.161107 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.89.161107
Abstract
We present the results of a systematic investigation of the magnetic properties of the three-dimensional Kondo topological insulator SmB6 using magnetization and muon-spin relaxation/rotation (μSR) measurements. The μSR measurements exhibit magnetic field fluctuations in SmB6 below ∼15 K due to electronic moments present in the system. However, no evidence for magnetic ordering is found down to 19 mK. The observed magnetism in SmB6 is homogeneous in nature throughout the full volume of the sample. Bulk magnetization measurements on the same sample show consistent behavior. The agreement between μSR, magnetization, and NMR results strongly indicate the appearance of intrinsic bulk magnetic in-gap states associated with fluctuating magnetic fields in SmB6 at low temperature.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||||
| Publisher: | American Physical Society | ||||||
| ISSN: | 1098-0121 | ||||||
| Official Date: | 14 April 2014 | ||||||
| Dates: |
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| Volume: | Volume 89 | ||||||
| Number: | Number 16 | ||||||
| DOI: | 10.1103/PhysRevB.89.161107 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access |
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