Spin structure around mobile holes in an antiferromagnet

✍ Scribed by J. Inoue; S. Maekawa

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 330 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(09)80100-2

✦ Synopsis

A hole in the two-dimensional antiferromagnetic state moves coherently resonating with the quantum spin fluctuation and is accompanied by distortions in the local spin structure around it like a magnetic polaron which extends up to third near neighbour sites. Spin correlation functions suggest a twisted character of the distortion. Due to the spin distortion around a hole, new spectra of the optical conductivity and Raman scattering of two-magnon process appear in the mid-infrared region. There also appear spectra of A 1g symmetry in Raman spectra which are prohibited in the insulating state. These results are consistent with the experimental ones.