Momentum-dependent charge transfer excitations in Sr2CuO2Cl2 angle-resolved electron energy loss spectroscopy

被引：59

作者：

Wang, YY

Zhang, FC

Dravid, VP

Ng, KK

Klein, MV

Schnatterly, SE

Miller, LL

机构：

[1] NORTHWESTERN UNIV,SCI & TECHNOL CTR SUPERCONDUCT,EVANSTON,IL 60208

[2] UNIV CINCINNATI,DEPT PHYS,CINCINNATI,OH 45221

[3] HONG KONG UNIV SCI & TECHNOL,DEPT PHYS,KOWLOON,HONG KONG

[4] UNIV ILLINOIS,DEPT PHYS,SCI & TECHNOL CTR SUPERCONDUCT,URBANA,IL 61801

[5] UNIV VIRGINIA,DEPT PHYS,CHARLOTTESVILLE,VA 22901

[6] IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.77.1809

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Electron-hole pair excitations in the insulating cuprates Sr2CuO2Cl2 were investigated by angle-resolved electron energy loss spectroscopy. The optically allowed and optically forbidden transitions were observed to be strongly anisotropic in the Cu-O-2 plane. The former show a large energy dispersion similar to 1.5 eV along [110], and the latter appear at a higher energy position (similar to 4.5 eV) only along [100], but not along [110]. We interpret these results as transitions involving excitons. A small exciton model is examined to explain both the observed features.

引用

页码：1809 / 1812

页数：4

共 21 条

[1] ABBEMONTE P, COMMUNICATION
[2] Resonant two-magnon Raman scattering in cuprate antiferromagnetic insulators
Blumberg, G
Abbamonte, P
Klein, MV
Lee, WC
Ginsberg, DM
Miller, LL
Zibold, A
[J]. PHYSICAL REVIEW B, 1996, 53 (18): : 11930 - 11933
[3] OPTICAL STUDIES OF THE A-AXIS, B-AXIS, AND C-AXIS CHARGE DYNAMICS IN YBA2CU3O6+X
COOPER, SL
REZNIK, D
KOTZ, A
KARLOW, MA
LIU, R
KLEIN, MV
LEE, WC
GIAPINTZAKIS, J
GINSBERG, DM
VEAL, BW
PAULIKAS, AP
[J]. PHYSICAL REVIEW B, 1993, 47 (13): : 8233 - 8248
[4] PHONON-ASSISTED MULTIMAGNON OPTICAL-ABSORPTION AND LONG-LIVED 2-MAGNON STATES IN UNDOPED LAMELLAR COPPER OXIDES
LORENZANA, J
SAWATZKY, GA
[J]. PHYSICAL REVIEW LETTERS, 1995, 74 (10) : 1867 - 1870
[5] WHAT IS THE MASS OF AN EXCITON
MATTIS, DC
GALLINAR, JP
[J]. PHYSICAL REVIEW LETTERS, 1984, 53 (14) : 1391 - 1393
[6] SYNTHESIS, STRUCTURE, AND PROPERTIES OF SR2CUO2CL2
MILLER, LL
WANG, XL
WANG, SX
STASSIS, C
JOHNSTON, DC
FABER, J
LOONG, CK
[J]. PHYSICAL REVIEW B, 1990, 41 (04): : 1921 - 1925
[7] LONG-WAVELENGTH COLLECTIVE EXCITATIONS OF CHARGE-CARRIERS IN HIGH-TC SUPERCONDUCTORS
NUCKER, N
ECKERN, U
FINK, J
MULLER, P
[J]. PHYSICAL REVIEW B, 1991, 44 (13): : 7155 - 7158
[8] MIDINFRARED OPTICAL-ABSORPTION IN UNDOPED LAMELLAR COPPER OXIDES
PERKINS, JD
GRAYBEAL, JM
KASTNER, MA
BIRGENEAU, RJ
FALCK, JP
GREVEN, M
[J]. PHYSICAL REVIEW LETTERS, 1993, 71 (10) : 1621 - 1624
[9] Raether H., 1980, EXCITATION PLASMONS
[10] EXCITATIONS OF A DIAMAGNETIC HOLE STATE IN THE COPPER-OXIDE SUPERCONDUCTORS
RICE, MJ
WANG, YR
[J]. PHYSICAL REVIEW B, 1987, 36 (16): : 8794 - 8797

← 1 2 3 →