Light scattering study of low-energy vibrational excitations in the metallic glass Ni67Zr33 using electronic Raman scattering

B. Muschler, I. Tütto, A. Zawadowski, J. Balogh, R. Hackl

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The Raman response of the metallic glass Ni67Zr33 is measured as a function of polarization and temperature and analyzed theoretically. Unexpectedly, the intensity in the range up to 300cm-1 increases upon cooling, which is counterintuitive when the response originates from vibrations alone as in insulators. The increase finds a natural explanation if the conduction electrons are assumed to scatter on localized vibrations with a scattering probability proportional to the Debye-Waller factor. None of our assumptions is material specific, and the results are expected to be relevant for disordered systems in general.

Original languageEnglish
Article number104104
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number10
DOIs
Publication statusPublished - Sep 6 2011

Fingerprint

Metallic glass
metallic glasses
Light scattering
Raman scattering
light scattering
Scattering
Polarization
Raman spectra
Cooling
vibration
Electrons
electronics
conduction electrons
excitation
insulators
cooling
Temperature
energy
polarization
scattering

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

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abstract = "The Raman response of the metallic glass Ni67Zr33 is measured as a function of polarization and temperature and analyzed theoretically. Unexpectedly, the intensity in the range up to 300cm-1 increases upon cooling, which is counterintuitive when the response originates from vibrations alone as in insulators. The increase finds a natural explanation if the conduction electrons are assumed to scatter on localized vibrations with a scattering probability proportional to the Debye-Waller factor. None of our assumptions is material specific, and the results are expected to be relevant for disordered systems in general.",
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AU - Muschler, B.

AU - Tütto, I.

AU - Zawadowski, A.

AU - Balogh, J.

AU - Hackl, R.

PY - 2011/9/6

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N2 - The Raman response of the metallic glass Ni67Zr33 is measured as a function of polarization and temperature and analyzed theoretically. Unexpectedly, the intensity in the range up to 300cm-1 increases upon cooling, which is counterintuitive when the response originates from vibrations alone as in insulators. The increase finds a natural explanation if the conduction electrons are assumed to scatter on localized vibrations with a scattering probability proportional to the Debye-Waller factor. None of our assumptions is material specific, and the results are expected to be relevant for disordered systems in general.

AB - The Raman response of the metallic glass Ni67Zr33 is measured as a function of polarization and temperature and analyzed theoretically. Unexpectedly, the intensity in the range up to 300cm-1 increases upon cooling, which is counterintuitive when the response originates from vibrations alone as in insulators. The increase finds a natural explanation if the conduction electrons are assumed to scatter on localized vibrations with a scattering probability proportional to the Debye-Waller factor. None of our assumptions is material specific, and the results are expected to be relevant for disordered systems in general.

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