SUBPICOSECOND TIME-RESOLVED STUDIES OF COHERENT PHONON OSCILLATIONS IN THIN-FILM YBA2CU3O6+X (X-LESS-THAN-0.4)

被引：85

作者：

CHWALEK, JM

UHER, C

WHITAKER, JF

MOUROU, GA

AGOSTINELLI, JA

机构：

[1] UNIV MICHIGAN,DEPT PHYS,ANN ARBOR,MI 48109

[2] EASTMAN KODAK CO,CORP RES LABS,ROCHESTER,NY 14650

来源：

APPLIED PHYSICS LETTERS | 1991年 / 58卷 / 09期

关键词：

D O I：

10.1063/1.104462

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the results of the first time-resolved observation of impulsively generated coherent optical phonon oscillations in the semiconducting cuprate compound YBa2Cu3O6 + x (x < 0.4). The oscillations, which were probed through time-resolved transmissivity modulation, had a period of 237 fs at room temperature, corresponding to a Raman active mode of A1g symmetry at 142 cm-1. No oscillations were observed in the superconducting form of Y-Ba-Cu-O either above or below T(c). The amplitude, frequency, and linewidth of this mode were measured over a temperature range from approximately 7 K to room temperature.

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页码：980 / 982

页数：3

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