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.

引用

页码：6840 / 6844

页数：5

共 26 条

[21] UNIVERSAL TRENDS IN EXTREME TYPE-II SUPERCONDUCTORS [J].

SCHNEIDER, T ;

KELLER, H .

PHYSICAL REVIEW LETTERS, 1992, 69 (23) :3374-3377

[22] EVOLUTION AND THE CONCOMITANT DISAPPEARANCE OF HIGH-TC SUPERCONDUCTIVITY WITH CARRIER CONCENTRATION IN THE LA2-XSRXCUO4-DELTA SYSTEM (0.0-LESS-THAN-X-LESS-THAN-1.2) - CROSSOVER FROM A MOTT INSULATOR TO A BAND METAL [J].

SREEDHAR, K ;

GANGULY, P .

PHYSICAL REVIEW B, 1990, 41 (01) :371-382

[23] SUPERCONDUCTOR-TO-NONSUPERCONDUCTOR TRANSITION IN (LA1-XSRX)2CUO4 AS INVESTIGATED BY TRANSPORT AND MAGNETIC MEASUREMENTS [J].

TAKAGI, H ;

IDO, T ;

ISHIBASHI, S ;

UOTA, M ;

UCHIDA, S ;

TOKURA, Y .

PHYSICAL REVIEW B, 1989, 40 (04) :2254-2261

[24] UNIVERSAL CORRELATIONS BETWEEN TC AND NS/M-STAR (CARRIER DENSITY OVER EFFECTIVE MASS) IN HIGH-TC CUPRATE SUPERCONDUCTORS [J].

UEMURA, YJ ;

LUKE, GM ;

STERNLIEB, BJ ;

BREWER, JH ;

CAROLAN, JF ;

HARDY, WN ;

KADONO, R ;

KEMPTON, JR ;

KIEFL, RF ;

KREITZMAN, SR ;

MULHERN, P ;

RISEMAN, TM ;

WILLIAMS, DL ;

YANG, BX ;

UCHIDA, S ;

TAKAGI, H ;

GOPALAKRISHNAN, J ;

SLEIGHT, AW ;

SUBRAMANIAN, MA ;

CHIEN, CL ;

CIEPLAK, MZ ;

XIAO, G ;

LEE, VY ;

STATT, BW ;

STRONACH, CE ;

KOSSLER, WJ ;

YU, XH .

PHYSICAL REVIEW LETTERS, 1989, 62 (19) :2317-2320

[25] HIGH-PRESSURE STUDY OF THE ANOMALOUS ISOTOPE EFFECT IN LA2-XAXCUO4 WITH A=SR OR BA [J].

XIONG, Q ;

CHU, JW ;

SUN, YY ;

FENG, HH ;

BUDKO, S ;

HOR, PH ;

CHU, CW .

PHYSICAL REVIEW B, 1992, 46 (01) :581-584

[26] OXYGEN-ISOTOPE EFFECT ON NEEL TEMPERATURE IN VARIOUS ANTIFERROMAGNETIC CUPRATES [J].

ZHAO, GM ;

SINGH, KK ;

MORRIS, DE .

PHYSICAL REVIEW B, 1994, 50 (06) :4112-4117

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