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Title: Anomalous quantum oscillations and evidence for a non-trivial Berry phase in SmSb

Journal Article · · npj Quantum Materials
 [1];  [1];  [1];  [2];  [1]; ORCiD logo [3];  [4]
  1. Zhejiang Univ., Hangzhou (China)
  2. High Magnetic Field Laboratory of the Chinese Academy of Sciences, Hefei (China)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Zhejiang Univ., Hangzhou (China); Nanjing Univ. (China)

Topologically non-trivial electronic structures can give rise to a range of unusual physical phenomena, and the interplay of band topology with other effects such as electronic correlations and magnetism requires further exploration. The rare earth monopnictides X(Sb,Bi) (X = lanthanide) are a large family of semimetals where these different effects may be tuned by the substitution of rare-earth elements. Here we observe anomalous behavior in the quantum oscillations of one member of this family, antiferromagnetic SmSb. The analysis of Shubnikov-de Haas (SdH) oscillations provides evidence for a non-zero Berry phase, indicating a non-trivial topology of the α-band. Furthermore, striking differences are found between the temperature dependence of the amplitudes of de Haas-van Alphen effect oscillations, which are well fitted by the Lifshitz-Kosevich (LK) formula across the measured temperature range, and those from SdH measurements which show a significant disagreement with LK behavior at low temperatures. Our findings of unusual quantum oscillations in an antiferromagnetic, mixed valence semimetal with a possible non-trivial band topology can provide an opportunity for studying the interplay between topology, electronic correlations and magnetism.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1544674
Report Number(s):
LA-UR-18-26934
Journal Information:
npj Quantum Materials, Vol. 4, Issue 1; ISSN 2397-4648
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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