中国物理B ›› 1996, Vol. 5 ›› Issue (8): 601-608.doi: 10.1088/1004-423X/5/8/005
皮飞鹏1, 莫党2, 林位株3
PI FEI-PENG (皮飞鹏)a, LIN WEI-ZHU (林位株)bc, MO DANG (莫党)b
摘要: With a correlation of nonequilibrium carriers relaxation and coherent phonons displacive excitation, the coherent optical phonon oscillations in YBa2Cu3O7-δ thin films excited by femtosecond laser pulse are simulated theoretically. It is revealed that as the oxygen concentration decreases, the coherent phonon oscillations become easier to be observed due to the decrease of the local coupling between the carriers and the lattice vibrations in the CuO2 plane.
中图分类号: (Phonons)