Acoustic-phonon anomaly in MgB2
2002 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 66, no 1Article in journal (Refereed) Published
Recent first-principles calculations of the phonon dispersion curves in MgB2 have suggested the presence of anomalies in some of the curves, particularly in the longitudinal acoustical (LA) branch in the Gamma to A direction. Similar behavior has been observed in numerous other superconductors with T-c's higher than those of standard electron-phonon BCS superconductors. Phenomenological calculations of the Gamma-->A LA dispersion based on both an acoustical plasmon and a "resonant polarization" mechanism are given here to emphasize the importance of these similarities.
Place, publisher, year, edition, pages
2002. Vol. 66, no 1
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-47864DOI: 10.1103/PhysRevB.66.014513OAI: oai:DiVA.org:liu-47864DiVA: diva2:268760
RF Wood, Bo Sernelius and AL Chernyshev, Acoustic-phonon anomaly in MgB2, 2002, Physical Review B. Condensed Matter and Materials Physics, (66), 1.
Copyright: American Physical Society