OXYGEN-ISOTOPE EFFECT ON THE EFFECTIVE-MASS OF CARRIERS FROM MAGNETIC MEASUREMENTS ON LA2-XSRXCUO4

被引：31

作者：

ZHAO, GM

SINGH, KK

SINHA, APB

MORRIS, DE

机构：

[1] Morris Research, Inc., Berkeley, CA 94704

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.52.6840

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Oxygen isotope effects on T-c and the Meissner fraction f have been investigated in fine-grained, decoupled La2-xSrxCuO4 with x=0.105, 0.110, and 0.115. We find that these oxygen isotope effects are related to each other: dInT(c)/dInM approximate to dInf/dInM (where M is the mass of oxygen). We also show that the trapped flux due to intergrain weak-link and intragrain flux pinning is negligible in our samples, and that the Meissner fractions for the samples with the same O-16 isotope are nearly equal The observed large oxygen isotope effects on T-c and the Meissner fraction can be explained as due to the oxygen-mass dependence of m* (effective mass of carriers). The results may suggest that the conducting carriers in the cuprate superconductors are of polaronic type.

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页码：6840 / 6844

页数：5

相关论文

共 26 条

[1] SPIN AND CHARGE BIPOLARON KINETICS OF HIGH-T(C) SUPERCONDUCTORS [J].

ALEXANDROV, AS ;

MOTT, NF .

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 1994, 8 (16) :2075-2109

[2] THE RESONATING VALENCE BOND STATE IN LA2CUO4 AND SUPERCONDUCTIVITY [J].

ANDERSON, PW .

SCIENCE, 1987, 235 (4793) :1196-1198

[3] ISOTOPE EFFECT IN THE HIGH-TC SUPERCONDUCTORS BA2YCU3O7 AND BA2EUCU3O7 [J].

BATLOGG, B ;

CAVA, RJ ;

JAYARAMAN, A ;

VANDOVER, RB ;

KOUROUKLIS, GA ;

SUNSHINE, S ;

MURPHY, DW ;

RUPP, LW ;

CHEN, HS ;

WHITE, A ;

SHORT, KT ;

MUJSCE, AM ;

RIETMAN, EA .

PHYSICAL REVIEW LETTERS, 1987, 58 (22) :2333-2336

[4] ISOTOPE EFFECT IN YBA2-XLAXCU3OZ - EVIDENCE FOR PHONON-MEDIATED HIGH-TEMPERATURE SUPERCONDUCTIVITY [J].

BORNEMANN, HJ ;

MORRIS, DE .

PHYSICAL REVIEW B, 1991, 44 (10) :5322-5325

[5] SEARCH FOR ISOTOPE EFFECT IN SUPERCONDUCTING Y-BA-CU-O [J].

BOURNE, LC ;

CROMMIE, MF ;

ZETTL, A ;

LOYE, HCZ ;

KELLER, SW ;

LEARY, KL ;

STACY, AM ;

CHANG, KJ ;

COHEN, ML ;

MORRIS, DE .

PHYSICAL REVIEW LETTERS, 1987, 58 (22) :2337-2339

[6] THEORY FOR THE HYSTERETIC PROPERTIES OF THE LOW-FIELD DC MAGNETIZATION IN TYPE-II SUPERCONDUCTORS [J].

CLEM, JR ;

HAO, ZD .

PHYSICAL REVIEW B, 1993, 48 (18) :13774-13783

[7] OXYGEN ISOTOPE EFFECT AND STRUCTURAL PHASE-TRANSITIONS IN LA2CUO4-BASED SUPERCONDUCTORS [J].

CRAWFORD, MK ;

FARNETH, WE ;

MCCARRON, EM ;

HARLOW, RL ;

MOUDDEN, AH .

SCIENCE, 1990, 250 (4986) :1390-1394

[8] ANOMALOUS OXYGEN ISOTOPE EFFECT IN LA2-XSRXCUO4 [J].

CRAWFORD, MK ;

KUNCHUR, MN ;

FARNETH, WE ;

MCCARRON, EM ;

POON, SJ .

PHYSICAL REVIEW B, 1990, 41 (01) :282-287

[9] THEORY OF HIGH-TC SUPERCONDUCTIVITY IN OXIDES [J].

EMERY, VJ .

PHYSICAL REVIEW LETTERS, 1987, 58 (26) :2794-2797

[10] COUPLED ELECTRON-PHONON SYSTEM [J].

ENGELSBERG, S ;

SCHRIEFFER, JR .

PHYSICAL REVIEW, 1963, 131 (03) :993-&