PRECISION DETERMINATION OF S(Q, OMEGA) OF LIQUID-HE-4 AS A FUNCTION OF TEMPERATURE

被引：14

作者：

ANDERSEN, KH

STIRLING, WG

SCHERM, R

STUNAULT, A

FAK, B

GODFRIN, H

DIANOUX, AJ

机构：

[1] UNIV KEELE,DEPT PHYS,KEELE ST5 5BG,STAFFS,ENGLAND

[2] SERC,DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND

[3] PHYS TECH BUNDESANSTALT,W-3300 BRAUNSCHWEIG,GERMANY

[4] CNRS,CTR RECH TRES BASSES TEMP,F-38042 GRENOBLE,FRANCE

来源：

PHYSICA B | 1992年 / 180卷

关键词：

D O I：

10.1016/0921-4526(92)90490-J

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report high-resolution high-precision measurements of S(Q, omega) of liquid He-4 at SVP at a range of temperatures above and below T(lambda), covering the wave vector range from 0.3 to 2.1 angstrom-1. The temperature dependence is seen to depend sensitively on Q, the phonon remaining a well-defined excitation above T(lambda), while the maxon and roton excitations change abruptly at T(lambda), leaving no sharp peak at temperatures above.

引用

页码：851 / 853

页数：3

共 7 条

[1] ZERO SOUND AND ATOMIC-LIKE EXCITATIONS - THE NATURE OF PHONONS AND ROTONS IN LIQUID-HE-4 [J].