Electron renormalization of sound interaction with two-level systems in superconducting metallic glasses
E. V. Bezuglyi, A. L. Gaiduk, V. D. Fil, S. Zherlitsyn, W. L. Johnson, G. Bruls, B. Lüthi, B. Wolf
DOI 10.1103/PhysRevB.62.6656 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The crossing of the temperature dependences of sound velocity in the normal and the superconducting state of metallic glasses indicates renormalization of the intensity of sound interaction with two-level systems (TLS’s) caused by their coupling with electrons. In this paper we examine different theoretical approaches to a quantitative description of the renormalization, using the results of a low-temperature ultrasonic investigation of Zr41.2Ti13.8Cu12.5Ni10Be22.5 amorphous alloy. It is shown that the adiabatic renormalization of the coherent tunneling amplitude can explain only part of the whole effect observed in the experiment. There exists another mechanism of the renormalization affecting only nearly symmetric TLS’s, which may be associated with the effect of electron density fluctuations on the interwell potential.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Zr41.2Ti13.8Cu12.5Ni10Be22.5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.83 | Pressure not reported | onset |
| Zr41.2Ti13.8Cu12.5Ni10Be22.5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.83 | Pressure not reported | onset |
| Pd30Zr70 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Cu30Zr70 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| (Mo1-xRux)0.8P0.2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Pressure dependence of superconductivity in amorphous ZrxNi100−x alloys
similarity 0.91F. Mahini et al.
Source status unknown — claims are unverified
Transport properties of Pb-doped Bi4Sr3Ca3Cu4Ox semiconducting glasses and glass-ceramic superconductors
similarity 0.89S. Chatterjee et al.
Source status unknown — claims are unverified
First-principles study on the superconductivity of doped zirconium diborides
similarity 0.89Sanjay Nayak et al.
Source status unknown — claims are unverified
Effect of superconducting fluctuations on ultrasound in an unconventional superconductor
similarity 0.88M. S. Mar’enko et al.
Source status unknown — claims are unverified
Heavy Quasiparticles in the Ferromagnetic Superconductor ZrZn2
similarity 0.88S. J. C. Yates et al.
Source status unknown — claims are unverified
Superconductivity and its pressure dependence in the Pb-doped Tl-Ba-Ca-Cu-O superconductors
similarity 0.88Lin Mingzhu et al.
Source status unknown — claims are unverified