EVIDENCE FOR STRIPE CORRELATIONS OF SPINS AND HOLES IN COPPER-OXIDE SUPERCONDUCTORS

被引：2908

作者：

TRANQUADA, JM ^{[1
]}

STERNLIEB, BJ ^{[1
]}

AXE, JD ^{[1
]}

NAKAMURA, Y ^{[1
]}

UCHIDA, S ^{[1
]}

机构：

[1] UNIV TOKYO,SUPERCOND RES COURSE,BUNKYO KU,TOKYO 113,JAPAN

来源：

NATURE | 1995年 / 375卷 / 6532期

关键词：

D O I：

10.1038/375561a0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

ONE Of the long-standing mysteries associated with the high-temperature copper oxide superconductors concerns the anomalous suppression(1) of superconductivity in La2-xBaxCuO4 (and certain related compounds) when the hole concentration x is near 1/8. Here we examine the possibility that this effect is related to dynamical two-dimensional spin correlations, incommensurate with the crystal lattice, that have been observed in La2-xSrxCuO4 by neutron scattering(2-4). A possible explanation for the incommensurability involves a coupled, dynamical modulation of spin and charge in which antiferromagnetic 'stripes' of copper spins are separated by periodically spaced domain walls to which the holes segregate(5-9). An ordered stripe phase of this type has recently been observed in hole-doped La2NiO4 (refs 10-12). We present evidence from neutron diffraction that in the copper oxide material La1.6-xNd0.4SrxCuO4, with x=0.12, a static analogue of the dynamical stripe phase is present, and is associated with an anomalous suppression of superconductivity(13,14). Our results thus provide an explanation of the '1/8' conundrum, and also support the suggestion(15) that spatial modulations of spin and charge density are related to superconductivity in the copper oxides.

引用

页码：561 / 563

页数：3

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