Low-temperature transport properties of NdBiPt

Morelli, Donald T.; Canfield, Paul C.; Drymiotis, P.

doi:10.1103/physrevb.53.12896

Cited by 21 publications

(18 citation statements)

References 21 publications

(20 reference statements)

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“…For H > 20 kOe, a broad local extremum in MR is observed for both magnetic field directions: a local maximum around 45 kOe for H [111] and a local minimum around 30 kOe for H [100]. This behavior may be due to the change of scattering processes with CEF levels, or it may be the oscillatory component corresponding to extremely small Fermi surface area in which the extremely small frequency has been observed for NdPtBi [21] in the paramagnetic state. For YbPtBi though this is not likely to be the case because the frequency is so small that it would have an amplitude that would make it hard to observe in SdH measurements.…”

Section: Resultsmentioning

confidence: 99%

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Quantum oscillations in the heavy-fermion compound YbPtBi

et al. 2015

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We present quantum oscillations observed in the heavy fermion compound YbPtBi in magnetic fields far beyond its field-tuned, quantum critical point. Quantum oscillations are observed in magnetic fields as low as 60 kOe at 60 mK and up to temperatures as high as 3 K, which confirms the very high quality of the samples as well as the small effective mass of conduction carriers far from the quantum critical point. Although the electronic specific heat coefficient of YbPtBi reaches ∼ 7.4 J/mol K 2 in zero field, which is one of the highest effective mass value among heavy fermion systems, it is suppressed quickly by applied magnetic field. The quantum oscillations were used to extract the quasiparticle effective masses of the order of the bare electron mass, which is consistent with the behavior observed in specific heat measurements. Such a small effective masses at high fields can be understood by considering the suppression of Kondo screening.

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Section: Resultsmentioning

confidence: 99%

“…We confirm the multiband nature of this system, but are unable to identify the Fermi surface with heavy masses. In addition, we compare our results to the family of RPtBi, where quantum oscillations have been observed for R = Y, La, Ce, and Nd [18][19][20][21].…”

Section: Introductionmentioning

confidence: 88%

Quantum oscillations in the heavy-fermion compound YbPtBi

et al. 2015

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“…Almost equivalent semimetallic band structure to LaBiPt has been speculated from the transport measurements in NdBiPt. 4 Meanwhile, the band structure of LaBiPt with La on the unique site is metallic and totally different from that with Pt or Bi on the unique site.…”

Section: A Structural Stabilitymentioning

confidence: 99%

Electronic band structure and structural stability of LaBiPt

Oguchi

2001

Phys. Rev. B

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The electronic structure and structural stability of LaBiPt are studied by using relativistic local-density energy band calculations. Total-energy calculations for three different atomic configurations within the MgAgAs-type crystal structure show that the Pt atom is definitely on a unique site. For the stable configuration, LaBiPt is semimetallic with hole and electron carrier concentrations of 10 Ϫ4 e. Calculated hole Fermi surfaces have nearly a cubic shape, whose cross sections and their field-angle dependence are in good agreement with recently observed Shubnikov-de Haas result. LaBiPt becomes a zero-gap semiconductor without the spin-orbit coupling, indicating that LaBiPt is a spin-orbit induced semimetal. The semimetallic nature originates mostly in BiPt and may be inherent in wider material systems like RBiPt with rare-earth elements R.

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“…The equiatomic ternary RBiPt intermetallic compounds (R ¼ rareÀearth elements) crystallize in the cubic MgAgAs-type structure (space group F 43m). The low-temperature electronic properties of these halfheusler compounds range from semiconductor or semimetal-like behaviour to metallic behaviour and both, local moment magnetism and heavy-fermion-like behaviour are observed depending on the hybridization between the rareearth 4f electrons and the conduction electrons [1][2][3]. CeBiPt is a semimetal with a rather low charge-carrier concentration.…”

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confidence: 98%