Charge density wave fluctuations in La2-xSrxCuO4 and their competition with superconductivity

被引：172

作者：

Croft, T. P. ^{[1
]}

Lester, C. ^{[1
]}

Senn, M. S. ^{[2
]}

Bombardi, A. ^{[2
]}

Hayden, S. M. ^{[1
]}

机构：

[1] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[2] Diamond Light Source Ltd, Didcot OX11 0DE, Oxon, England

来源：

PHYSICAL REVIEW B | 2014年 / 89卷 / 22期

基金：

英国工程与自然科学研究理事会;

关键词：

HIGH-TEMPERATURE SUPERCONDUCTOR; STRIPE ORDER; MAGNETIC-FIELD; LA1.85SR0.15CUO4; LA2-XSR(X)CUO4; SCATTERING; YBA2CU3OY;

D O I：

10.1103/PhysRevB.89.224513

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report hard (14 keV) x-ray diffraction measurements on three compositions (x = 0.11,0.12,0.13) of the high-temperature superconductor La2-xSrxCuO4. All samples show charge density wave (CDW) order with onset temperatures in the range 51-80 K and ordering wave vectors close to (0.23,0,0.5). The CDW is strongest with the longest in-plane correlation length near 1/8 doping. On entering the superconducting state the CDW is suppressed, demonstrating the strong competition between the charge order and superconductivity. CDW order coexists with incommensurate magnetic order and the wave vectors of the two modulations have the simple relationship delta(charge) = 2 delta(spin). The intensity of the CDW Bragg peak tracks the intensity of the low-energy (quasielastic) spin fluctuations. We present a phase diagram of La2-xSrxCuO4 including the pseudogap phase, CDW, and magnetic order.

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页数：8

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