Non-Fermi-liquid nature and exotic thermoelectric power in the heavy-fermion superconductor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>UBe</mml:mi><mml:mn>13</mml:mn></mml:msub></mml:math>

Shimizu, Yusei; Pourret, Alexandre; Knebel, G.; Palacio-Morales, Alexandra; Aoki, Dai

doi:10.1103/physrevb.92.241101

Cited by 11 publications

(6 citation statements)

References 55 publications

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“…It is likely that these systems have negative J. On the other hand, we expect J > 0 for some U and Pr systems such as UBe 13 17 and PrV 2 Al 10 , 18 which show behaviors analogous to those of canonical Kondo systems such as CeCu 2 Si 2 and CeB 6 . 9 In general, J tends to be positive and large as itinerant character of f electrons becomes stronger.…”

Section: Orbital Pseudo-spin and Exchange Interactionmentioning

confidence: 77%

“…Superconductivity emerges below about 1 K from this non-Fermi liquid state 15 as will be shown in Fig.11. 17 It is not trivial whether one can use the CEF picture in this material since the neutron scattering has probed only a broad feature. 39 On the other hand, Kondo effect is not seen in resistivity in such systems as PrAg 2 In 22 and PrMg 3 , 23 which neither show any symptom of electronic order at least down to 0.1 K. As a result, the T -coefficient of the specific heat becomes huge, reaching to several J/(mole·K 2 ).…”

Section: Orbital Kondo Effectmentioning

confidence: 99%

“…Some of the promising candidates will be discussed later. [15][16][17][18] Beginning with introductory description for the orbital Kondo effect, we shall review theoretical development achieved mainly after Ref. 14. Our view is basically consistent with Ref.14 for the two-channel Kondo effect.…”

Section: Introductionmentioning

confidence: 99%

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Composite electronic orders induced by orbital Kondo effect

Kuramoto

2016

Science Bulletin

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In a large number of rare-earth and actinide systems, Kondo effect tends to suppress magnetic order by making the spin singlet between localized and conduction electron spins. In the presence of orbital degrees of freedom, however, there emerge exotic electronic orders induced by Kondo effect. The orbital Kondo effect can collectively make diagonal and off-diagonal (superconducting) orders. With the particle-hole symmetry in conduction bands, these orders are all degenerate, forming a macroscopic SO(5) multiplet. This paper discusses recent theoretical development on these electronic orders which are relevant to Pr 3+ and U 4+ systems with even number of f electrons per site. In the superconducting order, each conduction-electron pair is coupled with local degrees of freedom, forming a composite entity with a staggered spatial pattern. The quasi-particle spectrum is best interpreted as virtual hybridization with resonant states at the Fermi level. Possible order parameter for URu2Si2 in the hidden order state is discussed in the context of composite orders. Briefly discussed are related issues such as homogeneous odd-frequency pairing and SO(5) theory for high-temperature superconductors.

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Section: Orbital Pseudo-spin and Exchange Interactionmentioning

confidence: 77%

Section: Orbital Kondo Effectmentioning

confidence: 99%

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Composite electronic orders induced by orbital Kondo effect

Kuramoto

2016

Science Bulletin

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“…This C/T  logT behavior in the normal state with Tc suppressed with field has also been seen [17] in the heavy fermion superconductor CeCoIn5. Interestingly, the normal state thermoelectric power in UBe13 also shows [18] a non-Fermi liquid logT behavior in zero field from Tc up to 2 K, which however is quickly suppressed with field. So a central question in understanding the normal state to be addressed is what parameters influence the formation of this large ?…”

Section: Introductionmentioning

confidence: 97%

UBe13 and U1−xThxBe13: Unconventional Superconductors

Stewart

2019

J Low Temp Phys

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UBe13 was the second discovered heavy fermion superconductor, and numerous pieces of evidence exist that imply that it is an unconventional (non-BCS swave) superconductor. Exhibiting even more signs of unconventional superconductivity, Th-doped UBe13 is perhaps the most puzzling of any of the unconventional superconductors. This review considers both the parent, undoped compound as well as the more interesting U1-xThxBe13. After summarizing the rather thorough characterization -which because of the interest in these compounds, has continued from their discovery in 1983 and 1984 to date -these properties are compared with a recent 'template' for determining whether a superconductor is unconventional. Finally, further experiments are suggested. II A. Normal State Experimental Results for UBe13/U1-xThxBe13

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“…Another example of |Γ T | > |Γ H | was reported for unconventional superconductor UBe 13 , 53) where it is well known that the band structure and non-Fermi liquid state are stronglyfield dependent. 56,57) A sole magnetic property may not link the electronic property. In UTe 2 , Γ T is nearly double of Γ H , indicating different channels of interactions.…”

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confidence: 99%

Magnetovolume Effect on the First-Order Metamagnetic Transition in UTe$_2$

Miyake,

Gen,

Ikeda

et al. 2022

Preprint

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Non-Fermi-liquid nature and exotic thermoelectric power in the heavy-fermion superconductorUBe13

Cited by 11 publications

References 55 publications

Composite electronic orders induced by orbital Kondo effect

Composite electronic orders induced by orbital Kondo effect

UBe13 and U1−xThxBe13: Unconventional Superconductors

Magnetovolume Effect on the First-Order Metamagnetic Transition in UTe$_2$

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