ANOMALOUS BEHAVIOR OF THE VIBRATIONAL-SPECTRUM OF THE HIGH-PRESSURE DELTA-PHASE OF NITROGEN - A 2ND-ORDER TRANSITION

被引：49

作者：

SCHEERBOOM, MIM

SCHOUTEN, JA

机构：

[1] Van der Waals-Zeeman Laboratorium, Universiteit Van Amsterdam, 1018 XE Amsterdam

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.71.2252

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In a careful Raman spectroscopic study on the high pressure delta phase of nitrogen we have observed an anomalous break in the slope of the vibrational Raman shift as a function of temperature. We interpret this as a second-order phase transition due to an orientational localization of the molecules, a phenomenon which has not previously been detected experimentally. Our results explain the change above 12 GPa in the experimental compressibility at room temperature measured by Olijnyk. The interpretation is consistent with the results of computer simulations.

引用

页码：2252 / 2255

页数：4

共 21 条

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