Comparison of the high-frequency magnetic fluctuations in insulating and superconducting La2-xSrxCuO4

被引：153
作者：
Hayden, SM
Aeppli, G
Mook, HA
Perring, TG
Mason, TE
Cheong, SW
Fisk, Z
机构：
[1] AT&T BELL LABS,MURRAY HILL,NJ 07974
[2] RISO NATL LAB,DK-400 ROSKILDE,DENMARK
[3] OAK RIDGE NATL LAB,OAK RIDGE,TN 37831
[4] RUTHERFORD APPLETON LAB,ISIS FACIL,DIDCOT OX11 0QX,OXON,ENGLAND
[5] UNIV TORONTO,DEPT PHYS,TORONTO,ON M5S 1A7,CANADA
[6] FLORIDA STATE UNIV,DEPT PHYS,TALLAHASSEE,FL 32306
来源：
PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 08期
关键词：
D O I：
10.1103/PhysRevLett.76.1344
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Inelastic neutron scattering performed at a spallation source is used to make absolute measurements of the dynamic susceptibility of insulating La2CuO4 and superconducting La1.86Sr0.14CuO4 over the energy range 15 less than or equal to (h) over bar omega less than or equal to 350 meV. The effect of Sr doping on the magnetic excitations is to cause a large broadening in the wave vector and a substantial change in the spectrum of the local spin fluctuations. Comparison of the two compositions reveals a new energy scale (h) over bar Gamma = 22 +/- 5 meV in La1.86Sr0.14CuO4.
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页码：1344 / 1347
页数：4
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