Lattice anomaly and dynamics of CuGeO3

被引：5

作者：

Fujita, M

Ubukata, K

Arai, M

Tonegawa, T

Mino, M

Motokawa, M

Knight, K

Forsyth, B

Bennington, SM

Akimitsu, J

Fujita, O

机构：

[1] KOBE UNIV, DEPT PHYS, KOBE 657, JAPAN

[2] RES DEV CORP JAPAN, KAWAGUCHI 332, JAPAN

[3] OKAYAMA UNIV, DEPT PHYS, OKAYAMA 700, JAPAN

[4] TOHOKU UNIV, INST MAT RES, SENDAI, MIYAGI 980, JAPAN

[5] RUTHERFORD APPLETON LAB, ISIS FACIL, DIDCOT OX11 0QX, OXON, ENGLAND

[6] AOYAMA GAKUIN UNIV, DEPT PHYS, TOKYO 157, JAPAN

来源：

PHYSICA B-CONDENSED MATTER | 1996年 / 219-20卷

关键词：

D O I：

10.1016/0921-4526(95)00661-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have performed neutron scattering on both single crystal and powder samples of spin-Peierls system CuGeO3. Below the transition temperature T-sp, we found spontaneous strains in all crystal axes. Temperature dependence of the lattice constants and phonon density of states change drastically well above T-sp, which is apparently linked with the transition. Thus, we concluded that inherent structural instability makes a favorable condition for the SP transition and also continuous transformation affects magnetic behavior above T-sp.

引用

页码：95 / 97

页数：3

共 12 条

[1]

BONNER JC, 1964, PHYS REV A, V135, P640

[2]

Bray J. W., 1983, Extended linear chain compounds. Vol.3, P353

[3] EXCHANGE INTERACTIONS IN SOME 3D-METAL IONIC COMPOUNDS .1. 180 DEGREES SUPEREXCHANGE IN 3D-METAL FLUORIDES XMF3 AND X2MF4 (X=K,RB,TL-M=MN,CO,NI) [J].

DEJONGH, LJ ;

BLOCK, R .

PHYSICA B & C, 1975, 79 (06) :568-593

[4] SUSCEPTIBILITY OF THE SPIN 1/2 HEISENBERG ANTIFERROMAGNETIC CHAIN [J].

EGGERT, S ;

AFFLECK, I ;

TAKAHASHI, M .

PHYSICAL REVIEW LETTERS, 1994, 73 (02) :332-335

[5] THERMAL CONTRACTION AT THE SPIN-PEIERLS TRANSITION IN CUGEO3 [J].

HARRIS, QJ ;

FENG, Q ;

BIRGENEAU, RJ ;

HIROTA, K ;

KAKURAI, K ;

LORENZO, JE ;

SHIRANE, G ;

HASE, M ;

UCHINOKURA, K ;

KOJIMA, H ;

TANAKA, I ;

SHIBUYA, Y .

PHYSICAL REVIEW B, 1994, 50 (17) :12606-12610

[6] OBSERVATION OF THE SPIN-PEIERLS TRANSITION IN LINEAR CU2+ (SPIN-1/2) CHAINS IN AN INORGANIC COMPOUND CUGEO3 [J].

HASE, M ;

TERASAKI, I ;

UCHINOKURA, K .

PHYSICAL REVIEW LETTERS, 1993, 70 (23) :3651-3654

[7] DIMERIZATION OF CUGEO3 IN THE SPIN-PEIERLS STATE [J].

HIROTA, K ;

COX, DE ;

LORENZO, JE ;

SHIRANE, G ;

TRANQUADA, JM ;

HASE, M ;

UCHINOKURA, K ;

KOJIMA, H ;

SHIBUYA, Y ;

TANAKA, I .

PHYSICAL REVIEW LETTERS, 1994, 73 (05) :736-739

[8] ELECTRON-DIFFRACTION STUDY OF THE INORGANIC SPIN-PEIERLS SYSTEM CUGEO3 [J].

KAMIMURA, O ;

TERAUCHI, M ;

TANAKA, M ;

FUJITA, O ;

AKIMITSU, J .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1994, 63 (07) :2467-2471

[9] SOFT LONGITUDINAL MODES IN SPIN-SINGLET CUGEO3 [J].

LORENZO, JE ;

HIROTA, K ;

SHIRANE, G ;

TRANQUADA, JM ;

HASE, M ;

UCHINOKURA, K ;

KOJIMA, H ;

TANAKA, I ;

SHIBUYA, Y .

PHYSICAL REVIEW B, 1994, 50 (02) :1278-1281

[10] NEUTRON-SCATTERING STUDY ON THE SPIN-PEIERLS TRANSITION IN A QUASI-ONE-DIMENSIONAL MAGNET CUGEO3 [J].

NISHI, M ;

FUJITA, O ;

AKIMITSU, J .

PHYSICAL REVIEW B, 1994, 50 (09) :6508-6510

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