Probing the extended non-Fermi liquid regimes of MnSi and Fe

P. Pedrazzini, D. Jaccard, G. Lapertot, J. Flouquet, Y. Inada, H. Kohara, Y. Onuki

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Recent studies show that the non-Fermi liquid (NFL) behavior of MnSi and Fe spans over an unexpectedly broad pressure range, between the critical pressure pc and around 2 pc. In order to determine the extension of their NFL regions, we analyze the evolution of the resistivity ρ ( T ) ∼ A ( p ) Tn at higher pressures. We find that in MnSi the n = frac(3, 2) exponent holds below 4.8 GPa ≈ 3 pc, but it increases above that pressure. At 7.2 GPa we observe the low-temperature Fermi liquid exponent n = 2 whereas for T > 1.5 K, n = frac(5, 3). Our measurements in Fe show that the NFL behavior ρ ∼ T5 / 3 extends at least up to 30.5 GPa, above the entire superconducting (SC) region. In the studied pressure range, the onset of the SC transition reduces by a factor 10 down to Tconset ( 30.5 GPa ) = 0.23 K, while the A-coefficient diminishes monotonically by around 50%.

Original languageEnglish
Pages (from-to)165-166
Number of pages2
JournalPhysica B: Condensed Matter
Volume378-380
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - May 1 2006
Externally publishedYes

Keywords

  • Fe
  • Ferromagnetism
  • MnSi
  • Non-Fermi liquids
  • Unconventional superconductivity

ASJC Scopus subject areas

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

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  • Cite this

    Pedrazzini, P., Jaccard, D., Lapertot, G., Flouquet, J., Inada, Y., Kohara, H., & Onuki, Y. (2006). Probing the extended non-Fermi liquid regimes of MnSi and Fe. Physica B: Condensed Matter, 378-380(SPEC. ISS.), 165-166. https://doi.org/10.1016/j.physb.2006.01.062