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 [J].

Blumberg, G ;

Abbamonte, P ;

Klein, MV ;

Lee, WC ;

Ginsberg, DM ;

Miller, LL ;

Zibold, A .

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 [J].

COOPER, SL ;

REZNIK, D ;

KOTZ, A ;

KARLOW, MA ;

LIU, R ;

KLEIN, MV ;

LEE, WC ;

GIAPINTZAKIS, J ;

GINSBERG, DM ;

VEAL, BW ;

PAULIKAS, AP .

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 [J].

LORENZANA, J ;

SAWATZKY, GA .

PHYSICAL REVIEW LETTERS, 1995, 74 (10) :1867-1870

[5] WHAT IS THE MASS OF AN EXCITON [J].

MATTIS, DC ;

GALLINAR, JP .

PHYSICAL REVIEW LETTERS, 1984, 53 (14) :1391-1393

[6] SYNTHESIS, STRUCTURE, AND PROPERTIES OF SR2CUO2CL2 [J].

MILLER, LL ;

WANG, XL ;

WANG, SX ;

STASSIS, C ;

JOHNSTON, DC ;

FABER, J ;

LOONG, CK .

PHYSICAL REVIEW B, 1990, 41 (04) :1921-1925

[7] LONG-WAVELENGTH COLLECTIVE EXCITATIONS OF CHARGE-CARRIERS IN HIGH-TC SUPERCONDUCTORS [J].

NUCKER, N ;

ECKERN, U ;

FINK, J ;

MULLER, P .

PHYSICAL REVIEW B, 1991, 44 (13) :7155-7158

[8] MIDINFRARED OPTICAL-ABSORPTION IN UNDOPED LAMELLAR COPPER OXIDES [J].

PERKINS, JD ;

GRAYBEAL, JM ;

KASTNER, MA ;

BIRGENEAU, RJ ;

FALCK, JP ;

GREVEN, M .

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 [J].

RICE, MJ ;

WANG, YR .

PHYSICAL REVIEW B, 1987, 36 (16) :8794-8797

← 1 2 3 →