Imaging the Essential Role of Spin Fluctuations in High-Tc Superconductivity

被引：42

作者：

Jenkins, N. ^{[1
]}

Fasano, Y. ^{[1
,2
,3
]}

Berthod, C. ^{[1
]}

Maggio-Aprile, I. ^{[1
]}

Piriou, A. ^{[1
]}

Giannini, E. ^{[1
]}

Hoogenboom, B. W. ^{[4
,5
]}

Hess, C. ^{[6
]}

Cren, T. ^{[7
,8
,9
]}

Fischer, O. ^{[1
]}

机构：

[1] Univ Geneva, DPMC, MaNEP, CH-1211 Geneva 4, Switzerland

[2] Inst Balseiro, San Carlos De Bariloche, Rio Negro, Argentina

[3] Ctr Atom Bariloche, San Carlos De Bariloche, Rio Negro, Argentina

[4] UCL, London Ctr Nanotechnol, London WC1H 0AH, England

[5] UCL, Dept Phys & Astron, London WC1H 0AH, England

[6] IFW Dresden, Leibniz Inst Solid State & Mat Res, D-01171 Dresden, Germany

[7] Univ Paris 06, Inst Nanosci Paris, F-75015 Paris, France

[8] Univ Paris 07, Inst Nanosci Paris, F-75015 Paris, France

[9] CNRS, UMR 75 88, F-75015 Paris, France

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 22期

基金：

瑞士国家科学基金会;

关键词：

SCANNING TUNNELING SPECTROSCOPY; SINGLE-CRYSTALS; BI2SR2CACU2O8+DELTA; DENSITY; STATES; PHOTOEMISSION; EXCITATIONS; RESONANCE; INTERPLAY; SPECTRA;

D O I：

10.1103/PhysRevLett.103.227001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have used scanning tunneling spectroscopy to investigate short-length electronic correlations in three-layer Bi2Sr2Ca2Cu3O10+delta (Bi-2223). We show that the superconducting gap and the energy Omega(dip), defined as the difference between the dip minimum and the gap, are both modulated in space following the lattice superstructure and are locally anticorrelated. Based on fits of our data to a microscopic strong-coupling model, we show that Omega(dip) is an accurate measure of the collective-mode energy in Bi-2223. We conclude that the collective mode responsible for the dip is a local excitation with a doping dependent energy and is most likely the (pi, pi) spin resonance.

引用

页数：4

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