Can ultrasonic sound attenuation measurements elucidate the coupling of “Heavy electrons” to the lattice?
Tóm tắt
An unusual peak has been found by Müller et al. for the attenuation of longitudinal sound as a function of temperature around 12 K for UPt3. Breathing mode coupling of the volume strain to the electronic energy states of a narrow band of high density at the fermi energy seems to be the origin of this peak.
Tài liệu tham khảo
Müller, V., Maurer, D., Groot, K. de, Bucher, E., Bömmel, H.E.: Observation of a low temperature resonance peak in ultrasonic attenuation of UPt3. Phys. Rev. Lett.56, 248 (1986)
Lüthi, B.: Magnetoacoustics in intermetallicf-electron systems. J. Magn. Magn. Mater.52, 70 (1985)
Abrikosov, A.A.: Introduction to the theory of normal metals. Solid State Phys. Suppl.12 (1972)
Akhiezer, A.I., Kaganov, M.I., Liubarskii, G.Ia.: Ultrasonic absorption in metals. JETP5, 685 (1957) (J. Exp. Teor. Fiz.32, 387 (1957))
Lüthi, B., Yoshizawa, M., Schotte, K.D. (to be published)
Fulde, P., Becker, K.: Theory of the longitudinal ultrasonic attenuation in heavy fermion systems. Europhys. Lett. (in press)