Polarization-dependent x-ray-absorption spectroscopy of single-crystal YNi2B2C superconductors
H. von Lips, Z. Hu, C. Grazioli, S.-L. Drechsler, G. Behr, M. Knupfer, M. S. Golden, J. Fink, H. Rosner, G. Kaindl
DOI 10.1103/PhysRevB.60.11444 · Physical Review B
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Abstract
Polarization-dependent x-ray-absorption spectroscopy of YNi2B2C single crystals is presented for the B 1s, C 1s, and Ni 2p absorption edges. With this technique the electronic structure of the unoccupied states can be examined both in a site and orbitally selective manner. The B 1s and C 1s absorption spectra reveal a highly anisotropic electronic structure, whereas for the Ni 2p edge hardly any anisotropy is found. The experimental data are compared with projected orbital-resolved density of states obtained from local density approximation band-structure calculations. A comparison of experimental and calculated data give good agreement for the B 1s and C 1s edges. The observed structures at the absorption thresholds of the examined edges support the scenario of a peaked density of states at the Fermi energy leading most probably to the relatively high superconducting transition temperature for this intermetallic compound.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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