Pregled bibliografske jedinice broj: 927745
Polarons and axial oxygen anharmonicity in YBCO
Polarons and axial oxygen anharmonicity in YBCO // Bulletin of Americal Physical Society
Indianapolis (IN), Sjedinjene Američke Države: American Physical Society, 1992. str. 594-594 (predavanje, nije recenziran, sažetak, znanstveni)
CROSBI ID: 927745 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Polarons and axial oxygen anharmonicity in YBCO
Autori
Mustre de Leon, J. ; Bishop, A.R. ; Batistić, I. ; Trugman, S.A. ; Conradson, S.D.
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Bulletin of Americal Physical Society
/ - : American Physical Society, 1992, 594-594
Skup
APS March meeting
Mjesto i datum
Indianapolis (IN), Sjedinjene Američke Države, 15.03.1992. - 20.03.1992
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Nije recenziran
Ključne riječi
polarons, anharmonicity
Sažetak
We present exact diagonalization results of an electron-phonon model Hamiltonian for the O(4)-Cu(1)-O(4) cluster in YBCO. For large enough electron-infrared phonon coupling the motion of holes aud ions becomes strongly correlated, i.e. polaronic. leading to a double-well structure for the infrared mode, as encountered in x-ray-absorption fine structure. In contrast, the associated Raman mode shows a single-well behavior even for large electron-Ramian phonon coupling, in agreentent with band structure calculations. The appearance of polarons accompanies nonadiabatic behavior yielding optical spectroscopy predictions differing from those obtained from anharmonic lattice dymamics models.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
