Unusual x-ray transport phenomena in La{sub 1-x}Sr{sub x}MnO{sub 3}
Unusual x-ray transport phenomena in La{sub 1-x}Sr{sub x}MnO{sub 3}
复制标题
La{sub 1-x}Sr{sub x}MnO{sub 3}中异常的x射线输运现象
DOI：
--
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
F. Razavi
中科院分区：
文献类型：
--
作者：
D. Casa;B. Keimer;M. Zimmermann;J. Hill;H. Habermeier;F. Razavi
当La{sub 1-x}Sr{sub x}MnO{sub 3}（x{approx}1/8）重复暴露于x射线时，发生有趣的记忆效应。虽然“暗”电导率仍然不受辐照历史的影响，但在低温下暴露于X射线后，电导率显著增强。在重新曝光后，它立即恢复到前一次曝光结束时获得的值。我们提供了一个定性的解释，这种不寻常的效果在三个不同的状态与不同的轨道相关性。
An interesting memory effect occurs when La{sub 1-x}Sr{sub x}MnO{sub 3} (x{approx}1/8) is repeatedly exposed to x rays. While the 'dark' conductivity remains unaffected by the irradiation history, the conductivity is markedly enhanced upon exposure to x rays at low temperatures. Immediately after renewed exposure, it recovers the value attained at the end of the previous exposure. We provide a qualitative explanation of this unusual effect in terms of three distinct states with different orbital correlations.