ENVELOPE-KINK PHONON LOCALIZED MODES IN A HOMOGENEOUS ANHARMONIC CHAIN

被引：13

作者：

SHI, ZP ^{[1
]}

HUANG, GX ^{[1
]}

机构：

[1] FUDAN UNIV,DEPT PHYS,SHANGHAI 200433,PEOPLES R CHINA

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.44.12601

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Phonon localized modes in a homogeneous anharmonic lattice chain are investigated with the coherent-state method. By making a long-wavelength approximation, we find that the equation of motion for boson operators is a modified Schrodinger equation. Envelope-kink phonon localized modes are obtained. These modes lie very near the top of the band and have a small energy gap. In the low-temperature limit, they make an extra contribution to the crystal specific heat. Whether these envelope-soliton phonon localized modes are intrinsic localized modes is also discussed.

引用

页码：12601 / 12604

页数：4

共 14 条

[1] ANOMALOUS SPECIFIC HEAT OF BCC HE3 [J].

DEWETTE, FW ;

WERTHAMER, NR .

PHYSICAL REVIEW, 1969, 184 (01) :209-+

[2]

Dodd R., 1982, SOLITON NONLINEAR WA

[3] LATTICE IMPERFECTIONS, ISOTOPIC ORDERING AND NUCLEAR SPIN INTERACTION IN SOLID HELIUM AS SHOWN BY SPECIFIC HEAT MEASUREMENTS [J].

EDWARDS, DO ;

MCWILLIAMS, AS ;

DAUNT, JG .

PHYSICS LETTERS, 1962, 1 (06) :218-220

[4] COHERENT AND INCOHERENT STATES OF RADIATION FIELD [J].

GLAUBER, RJ .

PHYSICAL REVIEW, 1963, 131 (06) :2766-+

[5] DIRECT MEASUREMENTS OF THERMAL VACANCIES IN BCC HE-4 [J].

GRANFORS, PR ;

FRAASS, BA ;

SIMMONS, RO .

JOURNAL OF LOW TEMPERATURE PHYSICS, 1987, 67 (5-6) :353-375

[6] SPECIFIC-HEAT OF BCC HE-3 [J].

GREYWALL, DS .

PHYSICAL REVIEW B, 1977, 15 (05) :2604-2623

[7] THERMAL VACANCIES IN SOLID HE-3 [J].

HEALD, SM ;

BAER, DR ;

SIMMONS, RO .

PHYSICAL REVIEW B, 1984, 30 (05) :2531-2541

[8] HEAT CAPACITY OF SOLID HE3 [J].

HELTEMES, EC ;

SWENSON, CA .

PHYSICAL REVIEW, 1962, 128 (04) :1512-&

[9] INTRINSIC LOCALIZED MODES IN ANHARMONIC CRYSTALS [J].

SIEVERS, AJ ;

TAKENO, S .

PHYSICAL REVIEW LETTERS, 1988, 61 (08) :970-973

[10] ANHARMONIC RESONANT MODES AND THE LOW-TEMPERATURE SPECIFIC-HEAT OF GLASSES [J].

SIEVERS, AJ ;

TAKENO, S .

PHYSICAL REVIEW B, 1989, 39 (05) :3374-3379

← 1 2 →