Strong Renormalization of Phonon Frequencies in Superconducting MgB2 and Related Compounds |
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| Authors: | B. Renker H. Schober P. Adelmann P. Bohnen D. Ernst R. Heid P. Schweiss Th. Wolf |
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| Affiliation: | (1) Forschungszentrum Karlsruhe, IFP, P.O.B. 3640, D-76021 Karlsruhe, Germany;(2) Institut Laue-Langevin, BP 156 X, F-38042 Grenoble Cedex, France |
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| Abstract: | We report on recent Raman- and inelastic neutron scattering measurements on Mg1–xAlxB2, LiBC and TMB2 (TM=transition metal). All materials crystallize in the AlB2 structure and show in particular for MgB2 a pronounced anharmonic behavior for the high energy in-plane boron mode. Part of our analysis are  ab initio calculations. |
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