Low-temperature properties of Samarium monopnictides

Hulliger, F.; Natterer, B.; Rüegg, K.

doi:10.1007/bf01322184

Cited by 17 publications

(7 citation statements)

References 13 publications

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“…There is a gradual increase in the magnetic susceptibility,  with decreasing temperature down to about 28 K typical for a paramagnetic material. There is a sharp peak at 9 K [see Fig 2(b) where the data are shown in expanded scales] indicating onset of antiferromagnetic ordering, which is in good agreement with the reports of Hulliger et al [14]. These results along with the characterizations described above establish the formation of high quality and stoichiometric single crystals of SmBi.…”

Section: Resultssupporting

confidence: 90%

Preparation, characterization and x-ray photoemission spectroscopy study of a correlated semimetal, SmBi

Sakhya¹,

Pramanik²,

Pandeya³

et al. 2020

Dae Solid State Physics Symposium 2019

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We report high quality single crystalline growth of SmBi using flux method. The compound crystallizes in the simple rock salt structure with space group Fm3m (No. 225). The cubic structure of the single crystal was confirmed by Laue diffraction pattern. The magnetic susceptibility measurements revealed sharp antiferromagnetic order with Néel temperature, TN = 9K. The core-level photoemission spectroscopy study of Sm 3d has been performed using monochromatic Al Kα (h =1486.6 eV) laboratory source. We observe multiple features in the experimental spectra due to final state effecta signature of hybridization between Sm 4f -Bi6p states. Intense satellite features are also observed presumably due to mixed valency arising from Kondo coupling. No signature of surface-bulk difference is observed in the Sm 3d core level spectra.

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Section: Resultssupporting

confidence: 90%

Preparation, characterization and x-ray photoemission spectroscopy study of a correlated semimetal, SmBi

Sakhya¹,

Pramanik²,

Pandeya³

et al. 2020

Dae Solid State Physics Symposium 2019

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“…A dome-shaped curve centered at about 25 K is evident in χ(T) plot akin to the observations in the Kondo insulator, SmB 6 [29]. With the decrease in temperature, χ(T) increases as expected in a paramagnetic system and shows a sharp peak at around 9 K (labelled as B) [30]. Interestingly, the experimental data reveal a second peak (labelled A) at 7 K (see the inset of the Figure 2) indicating presence of additional magnetic transition in the system.…”

Section: Resultssupporting

confidence: 61%

Evidence of non-trivial Berry phase and Kondo physics in SmBi

Sakhya,

Paulose,

Thamizhavel

et al. 2020

Preprint

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Realization of semimetals with non-trivial topologies such as Dirac and Weyl semimetals, have provided a boost in the study of these quantum materials. Presence of electron correlation makes the system even more exotic due to enhanced scattering of charge carriers, Kondo screening etc. Here, we studied the electronic properties of single crystalline, SmBi employing varied state of the art bulk measurements. Magnetization data reveals two magnetic transitions; an antiferromagnetic order with a Néel temperature of ∼ 9 K and a second magnetic transition at a lower temperature (= 7 K). The electrical resistivity data shows an upturn typical of a Kondo system and the estimated Kondo temperature is found to be close to the Néel temperature. High quality of the crystal enabled us to discover signature of quantum oscillation in the magnetization data even at low magnetic field. Using a Landau level fan diagram analysis, a non-trivial Berry phase is identified for a Fermi pocket revealing the topological character in this material. These results demonstrate an unique example of the Fermiology in the antiferromagnetic state and opens up a new paradigm to explore the Dirac fermion physics in correlated topological metal via interplay of Kondo interaction, topological order and magnetism.

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“…1 a, where the data up to 300 K is shown in the inset. The ρ(T ) data show a small hump at around 65 K, which is explained as resulting from the splitting of the crystalline electric fields [40], as well as a sharp drop of ρ(T ) at the antiferromagnetic transition at T N = 2.2 K [41]. While T N changes very little in applied magnetic fields [42], an upturn appears in ρ(T ) at low temperatures, which becomes more pronounced as the field is increased.…”

Section: Resultsmentioning

confidence: 91%

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

Guo

Smidman

et al. 2019

npj Quantum Mater.

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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.

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Low-temperature properties of Samarium monopnictides

Cited by 17 publications

References 13 publications

Preparation, characterization and x-ray photoemission spectroscopy study of a correlated semimetal, SmBi

Preparation, characterization and x-ray photoemission spectroscopy study of a correlated semimetal, SmBi

Evidence of non-trivial Berry phase and Kondo physics in SmBi

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

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