Local-moment fluctuations in the optimally doped high-Tc superconductor YBa2Cu3O6.95

被引：29
|
作者：
Reznik, D. [1 ,2 ]
Ismer, J. -P. [3 ,4 ]
Eremin, I. [3 ,4 ]
Pintschovius, L. [1 ]
Wolf, T. [1 ]
Arai, M. [5 ]
Endoh, Y. [6 ]
Masui, T. [7 ]
Tajima, S. [7 ]
机构：
[1] Forschungszentrum Karlsruhe, Inst Festkorperphys, D-76021 Karlsruhe, Germany
[2] CEA, CNRS, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France
[3] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[4] Tech Univ Carolo Wilhelmina Braunschweig, Inst Math & Theoret Phys, D-38106 Braunschweig, Germany
[5] KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan
[6] Japan Atom Energy Res Inst, Synchrotron Radiat Res Ctr, Mikazuki, Hyogo 6795148, Japan
[7] Osaka Univ, Dept Phys, Osaka 5600043, Japan
来源：
PHYSICAL REVIEW B | 2008年 / 78卷 / 13期
关键词：
D O I：
10.1103/PhysRevB.78.132503
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present results of neutron scattering experiments on YBa(2)Cu(3)O(6.95) (YBCO) (T(c)=93 K). Our results indicate that magnetic collective modes due to correlated local moments are present both above and below T(c) in optimally doped YBCO. The magnon-like modes are robust and not overdamped by itinerant particle-hole excitations. We compare the experimental results to predictions of the Fermi-liquid (FL) theory in the random phase approximation.
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页数：4
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