HIGH PRESSURE TRANSPORT STUDY OF NON-FERMI LIQUID BEHAVIOUR IN U2Pt2In AND U3Ni3Sn4

Visser, A. de; Estrela, Pedro; Naka, Takashi

doi:10.1142/s0217979202013420

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…U 3 Ni 3 Sn 4 is described as a heavy-fermion paramagnet located at the verge of the antiferromagnetic quantum critical point with the negative critical pressure of −0.04 GPa. 12,[16][17][18] From low-temperature specific heat measurements, it is suggested that the crossover from the non-Fermi liquid to the Fermi liquid state occurs below 0.4 K. 13) Upon applying pressure, the Fermi liquid state is recovered in a wide tempera-ture range. 16) A photoemission study by Takabatake et al indicated that hybridization of the partially filled Ni 3d bands with the U 5 f states may lead to the delocalization of the 5 f electrons in U 3 Ni 3 Sn 4 .…”

Section: Introductionmentioning

confidence: 99%

Splitting Fermi Surfaces and Heavy Electronic States in Non-Centrosymmetric U3Ni3Sn4

Maurya,

Harima,

Nakamura

et al. 2018

Preprint

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We report the single-crystal growth of the non-centrosymmetric paramagnet U 3 Ni 3 Sn 4 by the Bridgman method and the Fermi surface properties detected by de Haas-van Alphen (dHvA) experiments. We have also investigated singlecrystal U 3 Ni 3 Sn 4 by single-crystal X-ray diffraction, magnetization, electrical resistivity, and heat capacity measurements. The angular dependence of the dHvA frequencies reveals many closed Fermi surfaces, which are nearly spherical in topology. The experimental results are in good agreement with local density approximation (LDA) band structure calculations based on the 5 f -itinerant model. The band structure calculation predicts many Fermi surfaces, mostly with spherical shape, derived from 12 bands crossing the Fermi energy. To our knowledge, the splitting of Fermi surfaces due to the non-centrosymmetric crystal in 5 f -electron systems is experimentally detected for the first time. The temperature dependence of the dHvA amplitude reveals a large cyclotron effective mass of up to 35 m 0 , indicating the heavy electronic state of U 3 Ni 3 Sn 4 due to the proximity of the quantum critical point. From the field dependence of the dHvA amplitude, a mean free path of conduction electrons of up to 1950 Å is detected, reflecting the good quality of the grown crystal. The small splitting energy related to the antisymmetric spin-orbit interaction is most likely due to the large cyclotron effective mass.

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Section: Introductionmentioning

confidence: 99%

Splitting Fermi Surfaces and Heavy Electronic States in Non-Centrosymmetric U3Ni3Sn4

Maurya,

Harima,

Nakamura

et al. 2018

Preprint

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Uranium-based materials for thermoelectric applications

Svanidze

Veremchuk

Leithe‐Jasper

et al. 2019

Applied Physics Letters

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Uranium-based compounds possess several properties which make them suitable candidates for thermoelectric applications—complex crystal structures made of heavy components, electrons with enhanced effective masses, as well as low thermal conductivity. However, the difficulty in predicting their properties by computational means, coupled with the lack of experimental investigations on these peculiar systems, limits our understanding of the effect of 5f- and conduction electron hybridization on the Seebeck coefficient, as well as electric and thermal conductivities. In this work, we examine a family of uranium-based materials with a crystal structure of the ternary Zintl phase Y3Au3Sb4. The thermoelectric properties of U3T3Sb4 (T = Ni, Pd, and Pt) compounds are highly dependent upon their microstructures and compositions, arising from the differences in their synthesis. The maximum value of the thermoelectric figure of merit ZT≈0.02 was obtained for the U3Pt3Sb4 compound in the −100 °C ≤T≤ 100 °C temperature range, which makes this material interesting for further development in aerospace applications.

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Splitting Fermi Surfaces and Heavy Electronic States in Non-Centrosymmetric U₃Ni₃Sn₄

et al. 2018

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HIGH PRESSURE TRANSPORT STUDY OF NON-FERMI LIQUID BEHAVIOUR IN U₂Pt₂In AND U₃Ni₃Sn₄

Cited by 3 publications

References 9 publications

Splitting Fermi Surfaces and Heavy Electronic States in Non-Centrosymmetric U3Ni3Sn4

Splitting Fermi Surfaces and Heavy Electronic States in Non-Centrosymmetric U3Ni3Sn4

Uranium-based materials for thermoelectric applications

Splitting Fermi Surfaces and Heavy Electronic States in Non-Centrosymmetric U₃Ni₃Sn₄

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