Non-Fermi-liquid effects at ambient pressure in the stoichiometric heavy-fermion compound YbRh2Si2
| Autor: | C. Langhammer, O. Trovarelli, S. Mederle, Philipp Gegenwart, Michael Lang, G. Sparn, Frank Steglich, F. M. Grosche, C. Geibel |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Materials science
Condensed matter physics Magnetism Hydrostatic pressure Condensed Matter Physics Instability Electronic Optical and Magnetic Materials Metal Electrical resistivity and conductivity visual_art visual_art.visual_art_medium ddc:530 Fermi liquid theory Electrical and Electronic Engineering Stoichiometry Ambient pressure |
| Zdroj: | Physica B: Condensed Matter. :372-373 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/s0921-4526(99)01124-2 |
| Popis: | Strong deviations from the properties of a heavy Landau Fermi-liquid already at ambient pressure and zero field are reported for single-crystalline YbRh2Si2. The low-temperature specific-heat coefficient and the electrical resistivity show a logarithmic and a linear temperature dependence, respectively, in more than a decade in temperature. This anomalous metallic state is ascribed to the proximity of a very nearby magnetic instability. Application of hydrostatic pressure induces anomalies in the electrical resistivity, indicating the onset of long-range magnetic order at a critical pressure p c ≃0.5 GPa , which is so far the lowest required for the onset of magnetism in Yb compounds. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect