Superconducting states in the tetrahedral compound<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">PrOs</mml:mi></mml:mrow><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sb</mml:mi></mml:mrow><mml:mrow><mml:mn>12</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Sergienko, I. A.; Curnoe, S. H.

doi:10.1103/physrevb.70.144522

Cited by 103 publications

(166 citation statements)

References 34 publications

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“…For PrPt 4 Ge 12 , the Dynes function analysis was performed with an isotropic gap (model A) and with allowed anisotropic gaps (models B-F) 21 used to explain μSR and NQR data, 8,10 as shown in Fig. 4(c).…”

Section: Methodsmentioning

confidence: 99%

Comparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt4Ge12and PrPt4
Nakamura
¹
,
Okazaki
²
,
Yoshida
³

et al. 2012
Phys. Rev. B
24
6
22
1
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We performed a comparative study of the superconducting gap in the new filled skutterudite superconductors LaPt 4 Ge 12 and PrPt 4 Ge 12 using high-resolution photoemission spectroscopy. We succeeded in observing spectral changes across T c that reflect the opening of the superconducting gap in both compounds and also in observing a noticeable difference in their respective superconducting spectral shapes near the Fermi level, pointing toward a more complex superconducting gap structure in PrPt 4 Ge 12 . In addition, we found that the two-gap model is more suitable for describing the superconducting-state spectrum of PrPt 4 Ge 12 than the single-isotropic-gap and single-anisotropic-gap models, which suggests an explanation that multiband effects may possibly induce the anomalous superconducting properties of PrPt 4 Ge 12 .

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Section: Methodsmentioning

confidence: 99%

Comparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt4Ge12and PrPt4
Nakamura
¹
,
Okazaki
²
,
Yoshida
³

et al. 2012
Phys. Rev. B
24
6
22
1
View full text Add to dashboard Cite

show abstract

“…We have presented a formulation of the superconductivity, and obtained the transition temperatures and gap functions, including the results that have been obtained by previous authors [1][2][3]8]. We have derived the pairing interaction eq.…”

Section: Summary and Discussionmentioning

confidence: 98%

“…These transformations are essentially the same as those used in previous studies [1,2,8]. Using U k and U −k , the Hamiltonian H 0 is diagonalized as…”

Section: Formulationmentioning

confidence: 99%

Phase Diagrams of Noncentrosymmetric Superconductors

Seki

2013

J. Phys. Soc. Jpn.

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Noncentrosymmetric superconductors with various types of pairing interactions are systematically examined with particular focus on phenomena that originate from the differences between Fermi surfaces split by a strong spin-orbit coupling. In particular, when the spin-orbit coupling increases and one of the split Fermi surfaces disappears, the phase diagram and the structure of the gap function change drastically. For example, we examine the conditions for the transition from full-gap states to line-node states (FLT), which may explain the differences in the experimental results between the noncentrosymmetric superconductors Li 2 Pd 3 B and Li 2 Pt 3 B discovered recently. The dominant pairing interactions and gap functions can be predicted to some extent by comparing the theoretical and experimental results for these compounds. For example, if the FLT occurs by replacing Pd with Pt, it is most likely that the superconductivity is mainly induced by charge-charge interactions, and if this is the case, the superconductivities in Li 2 Pd 3 B and Li 2 Pt 3 B are an s-wave nearly spin-triplet state and a d-wave state that has both spin-singlet and triplet components of comparable weights, respectively. Comparing the theoretical phase diagrams in simple models, it is found that the FLT occurs in a wider realistic parameter region for chargecharge interactions, i.e., where short-range Coulomb repulsion is strong and p-wave and d-wave interactions are attractive, while it occurs in narrower rather unrealistic parameter regions for interactions of magnetic origin. It is also found that d-wave spin-triplet pairing may occur, when pairing interactions are of magnetic origin and anisotropic in spin space.

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“…[15] and are summarised in Table I. Each superconducting phase can be labeled by its symmetry group.…”

Section: Point Contact Conductance In Pros 4 Sb 12mentioning

confidence: 99%

“…Each superconducting phase can be labeled by its symmetry group. Some of the symmetry groups (for example T (D 2 )) contain elements that are combinations of rotations, phases and/or time reversal [15]. Symmetry groups that do not possess the element K have broken time reversal symmetry.…”

Section: Point Contact Conductance In Pros 4 Sb 12mentioning

confidence: 99%

A General Model of N/S Conductance Spectroscopy in Non-Unitary Superconductors Applied to PrOs₄Sb₁₂

Curnoe¹,

Bohloul²,

Wei³

2014

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013)

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A formula for point contact conductance from a normal metal tip into a superconductor is derived using the Blonder-Tinkham-Klapwijk theory of Andreev reflection, with special emphasis on nonunitary superconductors. The results of point contact conductance spectroscopy performed on single crystals of PrOs 4 Sb 12 are compared with calculations for all symmetry-allowed superconducting gap functions of PrOs 4 Sb 12 . While a non-unitary superconducting phase is ruled out, various other possible superconducting phases can produce the main feature seen in the experiment, namely a zero-bias peak; among them the phase with symmetry C 3 × K agrees best with previous experimental results. In addition, two-band superconductivity is implied by the appearance of two distinct spectroscopic features.

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Superconducting states in the tetrahedral compoundPrOs4Sb12

Cited by 103 publications

References 34 publications

Comparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt4Ge12and PrPt4
Nakamura
¹
,
Okazaki
²
,
Yoshida
³

et al. 2012
Phys. Rev. B
24
6
22
1
View full text Add to dashboard Cite

Comparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt4Ge12and PrPt4
Nakamura
¹
,
Okazaki
²
,
Yoshida
³

et al. 2012
Phys. Rev. B
24
6
22
1
View full text Add to dashboard Cite

Phase Diagrams of Noncentrosymmetric Superconductors

A General Model of N/S Conductance Spectroscopy in Non-Unitary Superconductors Applied to PrOs₄Sb₁₂

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Superconducting states in the tetrahedral compoundPrOs4Sb12

Cited by 103 publications

References 34 publications

Comparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt4Ge12and PrPt4Nakamura1, Okazaki2, Yoshida3 et al. 2012Phys. Rev. B246221View full textAdd to dashboardCite

Comparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt4Ge12and PrPt4Nakamura1, Okazaki2, Yoshida3 et al. 2012Phys. Rev. B246221View full textAdd to dashboardCite

Phase Diagrams of Noncentrosymmetric Superconductors

A General Model of N/S Conductance Spectroscopy in Non-Unitary Superconductors Applied to PrOs4Sb12

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Product

Resources

About

Comparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt4Ge12and PrPt4
Nakamura
¹
,
Okazaki
²
,
Yoshida
³

et al. 2012
Phys. Rev. B
24
6
22
1
View full text Add to dashboard Cite

Comparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt4Ge12and PrPt4
Nakamura
¹
,
Okazaki
²
,
Yoshida
³

et al. 2012
Phys. Rev. B
24
6
22
1
View full text Add to dashboard Cite

A General Model of N/S Conductance Spectroscopy in Non-Unitary Superconductors Applied to PrOs₄Sb₁₂