THERMOPOWER HYSTERESIS IN THE CHARGE-DENSITY WAVE STATE OF RB0.3MOO3 AND K0.3MOO3

被引：10

作者：

ALMEIDA, M ^{[1
]}

LOPES, EB ^{[1
]}

DUMAS, J ^{[1
]}

机构：

[1] CNRS,ETUD PROPRIETES ELECTR SOLIDES LAB,F-38042 GRENOBLE,FRANCE

来源：

SYNTHETIC METALS | 1991年 / 43卷 / 03期

关键词：

D O I：

10.1016/0379-6779(91)91688-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermopower S of Rb0.3MoO3 and K0.3MoO3 was measured in the range 20-300K. Two types of behaviour are observed in agreement with previous measurements in blue bronzes. In both the Charge Density Wave (CDW) transition is seen at T(c) = 181K as a sharp increase of the slope of dS/dT and the thermopower above T(c) is very small with values of congruent-to 3-mu-VK-1 at room temperature and becomes negative below T(c) where a large hysteresis is observed with a maximum amplitude in the range 80-130K. The observed hysteresis is correlated with the variation of the C.D.W. wave vector that becomes almost commensurate at less-than-or-equal-to 90K. The results are discussed in terms of local fluctuations of the C.D.W. distortion.

引用

页码：3833 / 3836

页数：4

共 13 条

[1] ANISOTROPY OF THERMOPOWER IN N-METHYL-N-ETHYLMORPHOLINIUM BISTETRACYANOQUINODIMETHANE, MEM(TCNQ)2, IN THE REGION OF THE HIGH-TEMPERATURE PHASE-TRANSITIONS [J].

ALMEIDA, M ;

ALCACER, L ;

OOSTRA, S .

PHYSICAL REVIEW B, 1984, 30 (05) :2839-2844

[2]

Brusetti R., 1981, RECENT DEV CONDENSED, P181, DOI [10.1007/978-1-4684-3899-4_24, DOI 10.1007/978-1-4684-3899-4_24]

[3] NMR-STUDY OF THE CHARGE-DENSITY WAVE IN RB0.30MOO3 SINGLE-CRYSTAL [J].

BUTAUD, P ;

SEGRANSAN, P ;

BERTHIER, C ;

DUMAS, J ;

SCHLENKER, C .

PHYSICAL REVIEW LETTERS, 1985, 55 (02) :253-256

[4] APPARATUS FOR THERMOPOWER MEASUREMENTS ON ORGANIC CONDUCTORS [J].

CHAIKIN, PM ;

KWAK, JF .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1975, 46 (02) :218-220

[5]

DAUDIN B, 1989, SYNTHETIC MET, V29, pF287

[6] METASTABLE ELECTRON-PARAMAGNETIC-RESONANCE SPECTRA IN THE CHARGE-DENSITY-WAVE STATE OF PURE AND V-DOPED BLUE BRONZES A03MOO3 (A = K, RB) [J].

DUMAS, J ;

LAAYADI, B ;

BUDER, R .

PHYSICAL REVIEW B, 1989, 40 (05) :2968-2975

[7]

HUEBENER RP, 1964, PHYS REV A-GEN PHYS, V135, P1281

[8] RIGIDITY OF CHARGE-DENSITY WAVE CURRENT UNDER INHOMOGENEOUS CONDITIONS IN THE BLUE BRONZE RB0.3MOO3 [J].

JANOSSY, A ;

MIHALY, G ;

PEKKER, S ;

ROTH, S .

SOLID STATE COMMUNICATIONS, 1987, 61 (01) :33-36

[9] FREQUENCY-DEPENDENT THERMOELECTRIC-POWER IN K0.3MOO3 [J].

KRIZA, G ;

MIHALY, G ;

GRUNER, G .

PHYSICAL REVIEW LETTERS, 1989, 62 (17) :2032-2035

[10] STRUCTURAL STUDY OF THE CHARGE-DENSITY-WAVE PHASE-TRANSITION OF THE BLUE BRONZE - K0.3MOO3 [J].

POUGET, JP ;

NOGUERA, C ;

MOUDDEN, AH ;

MORET, R .

JOURNAL DE PHYSIQUE, 1985, 46 (10) :1731-1742

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