Observation of a new excitation in bcc 4He by inelastic neutron scattering -: art. no. 195301

被引：43

作者：

Markovich, T ^{[1
]}

Polturak, E

Bossy, J

Farhi, E

机构：

[1] Technion Israel Inst Technol, Dept Phys, IL-3200 Haifa, Israel

[2] CNRS, Ctr Rech Tres Basses Temp, F-38042 Grenoble 9, France

[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.88.195301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report neutron-scattering measurements of the phonons in bcc solid He-4 . In general, only three acoustic phonon branches should exist in a monatomic cubic crystal. In addition to these phonon branches, we found a new "opticlike" mode along the [110] direction. One possible interpretation of this new mode is in terms of localized excitations unique to a quantum solid.

引用

页码：4 / 195301

页数：4

共 25 条

[1]

ANDREEV AF, 1982, PROGR LOW TEMPERATUR, V8, pCH2

[2]

BOCCARA N, 1965, PHYSICS LONG IS CITY, V1, P219

[3]

Choquard P.F., 1967, ANHARMONIC CRYSTAL

[4]

DYUMIN NE, 1993, LOW TEMP PHYS, V19, P696

[5]

Glyde H. R., 1994, EXCITATIONS LIQUID S

[6]

GLYDE HR, 1973, PHYS REV A, V8, P1513

[7] Local modes, phonons, and mass transport in solid 4He [J].

Gov, N ;

Polturak, E .

PHYSICAL REVIEW B, 1999, 60 (02) :1019-1027

[8] Diffusion in solid helium (a review) [J].

Grigorev, VN .

LOW TEMPERATURE PHYSICS, 1997, 23 (01) :3-14

[9] Vacancy Waves [J].

Guyer, R. A. .

JOURNAL OF LOW TEMPERATURE PHYSICS, 1972, 8 (5-6) :427-447

[10]

GUYER RA, 1969, SOLID STATE PHYS, V23, P413

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