UNSPECIFIED (2000) Electron-quasiparticle interaction in DyNi2B2C measured by point-contact spectroscopy. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 334 (3-4). pp. 152-162. ISSN 0921-4534

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Abstract

The electron-quasiparticle interaction (EQI) spectral function has been measured for DyNi2B2C in the normal state at low temperatures by means of point-contact spectroscopy (PCS). A low-frequency peak is found around eV similar to 5 meV. It becomes measurable at T-m* similar or equal to 15 K and grows in intensity with constant width as the temperature is lowered. We argue that this peak arises from the strong interaction of conduction electron with coupled crystal-electric-field-phonon excitations whose branches cross at low energy. The comparison with PC spectra for HoNi2B2C suggests that a similar peak also exists for this compound. The magnitude of the point-contact EQI parameter lambda(PC) for DyNi2B2C is estimated. (C) 2000 Elsevier Science B.V. All rights reserved.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0921-4534
Date:	15 June 2000
Volume:	334
Number:	3-4
Number of Pages:	11
Page Range:	pp. 152-162
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/13300

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