Universal behaviour and the two-component character of magnetically underdoped cuprate superconductors

IF 35 1区 物理与天体物理 Q1 PHYSICS, CONDENSED MATTER Advances in Physics Pub Date : 2008-01-01 DOI:10.1080/00018730802567505
V. Barzykin, D. Pines
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引用次数: 30

Abstract

We present a detailed review of scaling behaviour in the magnetically underdoped cuprate superconductors (hole dopings less than 0.20) and show that it reflects the presence of two coupled components throughout this doping regime: a non-Landau Fermi liquid and a spin liquid whose behaviour maps onto the theoretical Monte Carlo calculations of the two-dimensional Heisenberg model of localized Cu spins for most of its temperature domain. We use this mapping to extract the doping dependence of the strength, f(x) of the spin liquid component and the effective interaction, J eff(x) between the remnant localized spins that compose it; we find that both decrease linearly with x as the doping level increases. We discuss the physical origin of pseudogap behaviour and conclude that it is consistent with scenarios in which the both the large energy gaps found in the normal state and their subsequent superconductivity are brought about by the coupling between the Fermi liquid quasiparticles and the spin liquid excitations, and that differences in this coupling between the 1–2–3 and 2–1–4 materials can explain the measured differences in their superconducting transition temperatures and other properties.
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磁欠掺杂铜超导体的普遍行为和双组分特性
我们详细回顾了磁欠掺杂铜超导体(空穴掺杂小于0.20)的标度行为,并表明它反映了整个掺杂体系中两种耦合成分的存在:非朗道费米液体和自旋液体,其行为映射到二维海森堡模型的理论蒙特卡罗计算,该模型在其大部分温度域中都是局域铜自旋。我们使用这种映射来提取自旋液体组分的强度f(x)和组成它的残余局域自旋之间的有效相互作用jeff (x)的掺杂依赖性;我们发现两者都随着掺杂水平的增加而线性降低。我们讨论了赝隙行为的物理起源,并得出结论认为,在正常状态下发现的大能隙及其随后的超导性是由费米液体准粒子与自旋液体激发之间的耦合引起的,并且这种耦合在1-2-3和2-1-4材料之间的差异可以解释其超导转变温度和其他性质的测量差异。
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来源期刊
Advances in Physics
Advances in Physics 物理-物理:凝聚态物理
CiteScore
67.60
自引率
0.00%
发文量
1
期刊介绍: Advances in Physics publishes authoritative critical reviews by experts on topics of interest and importance to condensed matter physicists. It is intended for motivated readers with a basic knowledge of the journal’s field and aims to draw out the salient points of a reviewed subject from the perspective of the author. The journal''s scope includes condensed matter physics and statistical mechanics: broadly defined to include the overlap with quantum information, cold atoms, soft matter physics and biophysics. Readership: Physicists, materials scientists and physical chemists in universities, industry and research institutes.
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