Influence of the crystal field potential on the superconducting properties of PrRu4Sb12

D. T. Adroja; J. G. Park; E. A. Goremychkin; N. Takeda; M. Ishikawa; K. A. McEwen; R. Osborn; A. D. Hillier; B. D. Rainford

doi:10.1016/j.physb.2005.01.286

Influence of the crystal field potential on the superconducting properties of PrRu₄Sb₁₂

D. T. Adroja, J. G. Park, E. A. Goremychkin, N. Takeda, M. Ishikawa, K. A. McEwen, R. Osborn, A. D. Hillier, B. D. Rainford

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

We have determined the crystal field potential of the superconductor PrRu₄Sb₁₂ (Tc∼0.9K) using inelastic neutron scattering. The ground state of the Pr⁺³ ions in T_h point group symmetry is a Γ1 singlet with a Γ5 triplet at an energy of Δ∼5.6 meV. Comparison with recent results on the PrOs ₄Sb₁₂ compound, where Tc∼1.85K and Δ∼0.6 meV, supports the conjecture that inelastic quadrupolar fluctuations (or aspherical Coulomb scattering) are responsible for the strong enhancement of Tc. In PrRu₄Sb₁₂, the effect is reduced by the higher energy of the first excited level.

Original language	English
Pages (from-to)	983-985
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	359-361
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2005.01.286
Publication status	Published - 30 Apr 2005
Externally published	Yes

Keywords

Crystal fields
Inelastic neutron scattering
Superconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2005.01.286

Cite this

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title = "Influence of the crystal field potential on the superconducting properties of PrRu4Sb12",

abstract = "We have determined the crystal field potential of the superconductor PrRu4Sb12 (Tc∼0.9K) using inelastic neutron scattering. The ground state of the Pr+3 ions in Th point group symmetry is a Γ1 singlet with a Γ5 triplet at an energy of Δ∼5.6 meV. Comparison with recent results on the PrOs 4Sb12 compound, where Tc∼1.85K and Δ∼0.6 meV, supports the conjecture that inelastic quadrupolar fluctuations (or aspherical Coulomb scattering) are responsible for the strong enhancement of Tc. In PrRu4Sb12, the effect is reduced by the higher energy of the first excited level.",

keywords = "Crystal fields, Inelastic neutron scattering, Superconductivity",

author = "Adroja, {D. T.} and Park, {J. G.} and Goremychkin, {E. A.} and N. Takeda and M. Ishikawa and McEwen, {K. A.} and R. Osborn and Hillier, {A. D.} and Rainford, {B. D.}",

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doi = "10.1016/j.physb.2005.01.286",

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volume = "359-361",

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T1 - Influence of the crystal field potential on the superconducting properties of PrRu4Sb12

AU - Adroja, D. T.

AU - Park, J. G.

AU - Goremychkin, E. A.

AU - Takeda, N.

AU - Ishikawa, M.

AU - McEwen, K. A.

AU - Osborn, R.

AU - Hillier, A. D.

AU - Rainford, B. D.

PY - 2005/4/30

Y1 - 2005/4/30

N2 - We have determined the crystal field potential of the superconductor PrRu4Sb12 (Tc∼0.9K) using inelastic neutron scattering. The ground state of the Pr+3 ions in Th point group symmetry is a Γ1 singlet with a Γ5 triplet at an energy of Δ∼5.6 meV. Comparison with recent results on the PrOs 4Sb12 compound, where Tc∼1.85K and Δ∼0.6 meV, supports the conjecture that inelastic quadrupolar fluctuations (or aspherical Coulomb scattering) are responsible for the strong enhancement of Tc. In PrRu4Sb12, the effect is reduced by the higher energy of the first excited level.

AB - We have determined the crystal field potential of the superconductor PrRu4Sb12 (Tc∼0.9K) using inelastic neutron scattering. The ground state of the Pr+3 ions in Th point group symmetry is a Γ1 singlet with a Γ5 triplet at an energy of Δ∼5.6 meV. Comparison with recent results on the PrOs 4Sb12 compound, where Tc∼1.85K and Δ∼0.6 meV, supports the conjecture that inelastic quadrupolar fluctuations (or aspherical Coulomb scattering) are responsible for the strong enhancement of Tc. In PrRu4Sb12, the effect is reduced by the higher energy of the first excited level.

KW - Crystal fields

KW - Inelastic neutron scattering

KW - Superconductivity

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