High-frequency behavior of metallic glass NixNb1-x point-contacts

O. P. Balkashin, I. K. Yanson, A. Halbritter, G. Mihály

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Electron-two level system interaction in Ni59Nb41 metallic glass point contacts is studied by means of conventional and high-frequency point-contact spectroscopy, at frequencies of 3.6 kHz, 0.78 GHz and 64 GHz. The amplitude of the zero bias anomaly exhibits only a 25% decrease under microwave irradiation of 64 GHz. This implies that elastic electron interaction with highly-asymmetric slow two-level fluctuators explains only a small part in the anomaly, and the main contribution is due to fast nonmagnetic Kondo-like scattering. Point contacts of Ni44Nb56 in the superconducting state were also studied. The value of the energy gap was evaluated as Δ0 ∼ 0.4 meV. Under microwave irradiation with increasing power a gradual decrease of the critical current was observed.

Original languageEnglish
Pages (from-to)623-627
Number of pages5
JournalSolid State Communications
Volume118
Issue number12
DOIs
Publication statusPublished - Jun 18 2001

Keywords

  • A. Disordered systems
  • D. Kondo effects
  • D. Tunnelling

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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