Evidence for a hybridization gap in noncentrosymmetric CeRuSi3

M. Smidman; D. T. Adroja; E. A. Goremychkin; M. R. Lees; D. M. Paul; G. Balakrishnan

doi:10.1103/PhysRevB.91.064419

Evidence for a hybridization gap in noncentrosymmetric CeRuSi3

M. Smidman, D. T. Adroja, E. A. Goremychkin, M. R. Lees, D. M. Paul, G. Balakrishnan

Physics

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12 Citations (Scopus)

Abstract

Inelastic neutron scattering (INS) and specific heat measurements have been performed on the intermediate valence compound CeRuSi3, which is isostructural to the noncentrosymmetric pressure-induced superconductors CeRhSi3,CeIrSi3, and CeCoGe3. INS measurements at 7 K reveal a broad peak at (58.5 ±1.4) meV, while at 300 K, broad quasielastic scattering is observed. This indicates a large Kondo temperature of TK∼680 K. The magnetic contribution to the specific heat (Cmag) has a value of γ=62.5(1)mJ/molK2 at low temperatures and above about 100 K can be well accounted for by the Coqblin-Schrieffer model with a characteristic temperature of T0=680 K, which is further evidence that CeRuSi3 is in the intermediate valence regime.

Original language	English
Article number	064419
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	91
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.91.064419
Publication status	Published - 19 Feb 2015

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.91.064419

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title = "Evidence for a hybridization gap in noncentrosymmetric CeRuSi3",

abstract = "Inelastic neutron scattering (INS) and specific heat measurements have been performed on the intermediate valence compound CeRuSi3, which is isostructural to the noncentrosymmetric pressure-induced superconductors CeRhSi3,CeIrSi3, and CeCoGe3. INS measurements at 7 K reveal a broad peak at (58.5 ±1.4) meV, while at 300 K, broad quasielastic scattering is observed. This indicates a large Kondo temperature of TK∼680 K. The magnetic contribution to the specific heat (Cmag) has a value of γ=62.5(1)mJ/molK2 at low temperatures and above about 100 K can be well accounted for by the Coqblin-Schrieffer model with a characteristic temperature of T0=680 K, which is further evidence that CeRuSi3 is in the intermediate valence regime.",

author = "M. Smidman and Adroja, {D. T.} and Goremychkin, {E. A.} and Lees, {M. R.} and Paul, {D. M.} and G. Balakrishnan",

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T1 - Evidence for a hybridization gap in noncentrosymmetric CeRuSi3

AU - Smidman, M.

AU - Adroja, D. T.

AU - Goremychkin, E. A.

AU - Lees, M. R.

AU - Paul, D. M.

AU - Balakrishnan, G.

PY - 2015/2/19

Y1 - 2015/2/19

N2 - Inelastic neutron scattering (INS) and specific heat measurements have been performed on the intermediate valence compound CeRuSi3, which is isostructural to the noncentrosymmetric pressure-induced superconductors CeRhSi3,CeIrSi3, and CeCoGe3. INS measurements at 7 K reveal a broad peak at (58.5 ±1.4) meV, while at 300 K, broad quasielastic scattering is observed. This indicates a large Kondo temperature of TK∼680 K. The magnetic contribution to the specific heat (Cmag) has a value of γ=62.5(1)mJ/molK2 at low temperatures and above about 100 K can be well accounted for by the Coqblin-Schrieffer model with a characteristic temperature of T0=680 K, which is further evidence that CeRuSi3 is in the intermediate valence regime.

AB - Inelastic neutron scattering (INS) and specific heat measurements have been performed on the intermediate valence compound CeRuSi3, which is isostructural to the noncentrosymmetric pressure-induced superconductors CeRhSi3,CeIrSi3, and CeCoGe3. INS measurements at 7 K reveal a broad peak at (58.5 ±1.4) meV, while at 300 K, broad quasielastic scattering is observed. This indicates a large Kondo temperature of TK∼680 K. The magnetic contribution to the specific heat (Cmag) has a value of γ=62.5(1)mJ/molK2 at low temperatures and above about 100 K can be well accounted for by the Coqblin-Schrieffer model with a characteristic temperature of T0=680 K, which is further evidence that CeRuSi3 is in the intermediate valence regime.

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Evidence for a hybridization gap in noncentrosymmetric CeRuSi3

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