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000015735 1001_ $$0P:(DE-HGF)0$$aMittal, R.$$b0
000015735 245__ $$aPhonon Dynamics in Parent and Superconducting FeAs Compounds
000015735 260__ $$aTaipei$$bPhysical Society of the Republic of China$$c2011
000015735 300__ $$a403 - 413
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000015735 520__ $$aThe comparison of the phonon spectra of the parent MFe2As2 (M = Ba, Ca, Sr) and MFeAsF (M = Ca, Sr) compounds show a very strong renormalization in the lower and intermediate frequency part of the vibrations. Mass effects and lattice contraction cannot solely explain these changes. Further, the measurement of temperature dependence of phonon density of states across the magnetic/structural phase transition temperature indicates that softening of low energy modes in the paramagnetic state of these compounds may be due to the interaction of phonons with electron or short-range spin fluctuations in the normal state of the superconducting compound as well as in the parent compound. Detailed lattice dynamical calculations are carried out to analyze the experimental data.
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000015735 7001_ $$0P:(DE-HGF)0$$aZbiri, M.$$b1
000015735 7001_ $$0P:(DE-HGF)0$$aRols, S.$$b2
000015735 7001_ $$0P:(DE-Juel1)130991$$aSu, Y.$$b3$$uFZJ
000015735 7001_ $$0P:(DE-Juel1)131047$$aXiao, Y.$$b4$$uFZJ
000015735 7001_ $$0P:(DE-HGF)0$$aChaplot, S.L.$$b5
000015735 7001_ $$0P:(DE-HGF)0$$aSchober, H.$$b6
000015735 7001_ $$0P:(DE-HGF)0$$aJohnson, M.$$b7
000015735 7001_ $$0P:(DE-HGF)0$$aChatterji, T.$$b8
000015735 7001_ $$0P:(DE-HGF)0$$aMatsuishi, S.$$b9
000015735 7001_ $$0P:(DE-HGF)0$$aHosono, H.$$b10
000015735 7001_ $$0P:(DE-Juel1)130572$$aBrückel, T.$$b11$$uFZJ
000015735 773__ $$0PERI:(DE-600)2125310-9$$gVol. 49, p. 403 - 413$$p403 - 413$$q49<403 - 413$$tChinese journal of physics$$v49$$x0577-9073$$y2011
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000015735 9141_ $$y2011
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