Physics – Condensed Matter – Superconductivity
Scientific paper
2007-05-23
Phys.Rev. B 76, 014520 (2007)
Physics
Condensed Matter
Superconductivity
11 pages, 8 figs, to be published in PRB, Vol.75, Iss.21
Scientific paper
10.1103/PhysRevB.76.014520
Point-contact (PC) spectroscopy measurements on antiferromagnetic (AF) (T_N=5.2K) HoNi2B2C single crystals in the normal and two different superconducting (SC) states (T_c=8.5K and $T_c^*=5.6K) are reported. The PC study of the electron-boson(phonon) interaction (EB(P)I) spectral function reveals pronounced phonon maxima at 16, 22 and 34meV. For the first time the high energy maxima at about 50meV and 100meV are resolved. Additionally, an admixture of a crystalline-electric-field (CEF) excitations with a maximum near 10meV and a `magnetic` peak near 3meV are observed. The contribution of the 10-meV peak in PC EPI constant \lambda_PC is evaluated as 20-30%, while contribution of the high energy modes at 50 and 100meV amounts about 10% for each maxima, so the superconductivity might be affected by CEF excitations. The SC gap in HoNi2B2C exhibits a standard single-band BCS-like dependence, but vanishes at $T_c^*=5.6K
Behr Günter
Drechsler Stefan-Ludwig
Fuchs Guenter
Kvitnitskaya O. E.
Naidyuk Yu. G.
No associations
LandOfFree
Point-contact spectroscopy of the antiferromagnetic superconductor HoNi2B2C in the normal and superconducting state does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Point-contact spectroscopy of the antiferromagnetic superconductor HoNi2B2C in the normal and superconducting state, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Point-contact spectroscopy of the antiferromagnetic superconductor HoNi2B2C in the normal and superconducting state will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-402172