Science Faculty

Lines of research

• Low-temperature thermal properties of disordered solids: specific heat, thermal conductivity, vibrational density of states.
• The glass transition.
• Physics of glasses and amorphous solids, including orientationally-disordered crystals.
• Superconductivity and/or magnetism in carbon materials (diamond, graphite) induced by MeV ion-beam irradiation.

1. Glassy Anomalies in the Low-Temperature Thermal Properties of a Minimally Disordered Crystalline Solid, J. F. Gebbia, M. A. Ramos, D. Szewczyk, A. Jezowski, A. I. Krivchikov, Y. V. Horbatenko, T. Guidi, F. J. Bermejo, and J. Ll. Tamarit, Phys. Rev. Lett. 119, 215506 (2017). [URL]

2. Thermodynamic and Kinetic Fragility of Freon 113: The Most Fragile Plastic Crystal, A. Vispa, M. Romanini, M. A. Ramos, L. C. Pardo, F. J. Bermejo, M. Hassaine, A. I. Krivchikov, J. W. Taylor, and J. Ll. Tamarit, Phys. Rev. Lett. 118, 105701 (2017). [URL]

3. Lattice damage in 9-MeV-carbon irradiated diamond and its recovery after annealing, F. Agulló-Rueda, N. Gordillo, M. D. Ynsa, A. Maira, J. Cañas, and M. A. Ramos, Carbon 123, 334-343 (2017). [URL]

4. Micro-Raman spectroscopy of near-surface damage in diamond irradiated with 9-MeV boron ions, F. Agulló-Rueda, M. D. Ynsa, N. Gordillo, A. Maira, D. Moreno-Cerrada, and M. A. Ramos, Diamond & Related Materials 72, 94-98 (2017). [URL]

5. Suppression of tunneling two-level systems in ultrastable glasses of indomethacin, T. Pérez-Castañeda, C. Rodríguez-Tinoco, J. Rodríguez-Viejo, and M. A. Ramos, PNAS 111, 11275-11280 (2014). [URL]

6. Two-Level Systems and Boson Peak Remain Stable in 110-Million-Year-Old Amber Glass, Tomás Pérez-Castañeda, Rafael J. Jiménez-Riobóo, and Miguel A. Ramos, Phys. Rev. Lett. 112, 165901 (2014). [URL]

7. Probing cooperative liquid dynamics with the mean square displacement, U. Buchenau, R. Zorn and M. A. Ramos, Phys. Rev. E 90, 042312 (2014). [URL]

8. Low-temperature thermal and elastoacoustic properties of butanol glasses: Study of position isomerism effects around the boson peak, Merzak Hassaine, Miguel A. Ramos, A. I. Krivchikov, I. V. Sharapova, O. A. Korolyuk, and Rafael J. Jiménez-Riobóo, Phys. Rev. B 85, 104206 (2012). [URL]

9. Magnetic properties of graphite irradiated with MeV ions, M. A. Ramos, J. Barzola-Quiquia, P. Esquinazi, A. Muñoz-Martin, A. Climent-Font, and M. García-Hernández, Phys. Rev. B 81, 214404 (2010). [URL]

10. Structural and thermodynamic studies of n-butanol, I. M. Shmyt’ko, R. J. Jiménez-Riobóo, M. Hassaine, and M. A. Ramos, J. Phys.: Condens. Matter 22, 195102 (2010). [URL]