OPTICALLY INDUCED METASTABILITY IN UNTWINNED SINGLE-DOMAIN YBA2CU3O7

被引：63

作者：

WAKE, DR ^{[1
]}

SLAKEY, F ^{[1
]}

KLEIN, MV ^{[1
]}

RICE, JP ^{[1
]}

GINSBERG, DM ^{[1
]}

机构：

[1] UNIV ILLINOIS,SCI & TECHNOL CTR SUPERCONDUCT,URBANA,IL 61801

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.67.3728

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Raman spectra of untwinned YBa2Cu3O7 with T(c) = 91 K indicate a 2.2-eV resonance for incident light polarized in the CuO chain direction. The resonance is characterized by the appearance of nominally forbidden phonon modes at 232 and 597 cm-1. Below 100 K the forbidden modes can be optically bleached if the photon energy exceeds 2.2 eV. The resulting optically induced low-temperature state is metastable; upon warming the crystal to T > 200 K the forbidden modes reappear as before.

引用

页码：3728 / 3731

页数：4

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