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Evidence for a hybridization gap in noncentrosymmetric CeRuSi3
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Smidman, M., Adroja, D. T., Goremychkin, E. A., Lees, Martin R., Paul, Don McK. and Balakrishnan, Geetha (2015) Evidence for a hybridization gap in noncentrosymmetric CeRuSi3. Physical Review B (Condensed Matter and Materials Physics), 91 (6). 064419. doi:10.1103/PhysRevB.91.064419
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Official URL: http://dx.doi.org/10.1103/PhysRevB.91.064419
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.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||||
| Divisions: | Faculty of Science > Physics | ||||||
| Library of Congress Subject Headings (LCSH): | Neutrons--Inelastic scattering, Inelastic scattering, Neutrons--Scattering, Conduction electrons, Superconductors, Superconductors--Thermal properties, Superconductors--Magnetic properties | ||||||
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||||
| Publisher: | American Physical Society | ||||||
| ISSN: | 1098-0121 | ||||||
| Official Date: | 19 February 2015 | ||||||
| Dates: |
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| Volume: | 91 | ||||||
| Number: | 6 | ||||||
| Article Number: | 064419 | ||||||
| DOI: | 10.1103/PhysRevB.91.064419 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Copyright Holders: | American Physical Society | ||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Science and Technology Facilities Council (Great Britain) (STFC), Advantage West Midlands (AWM), European Regional Development Fund (ERDF) | ||||||
| Grant number: | EP/I007210/1 (EPSRC), CMPC-09108 (STFC) |
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