Charge order in the incommensurate compounds

✍ Scribed by Marie-Bernadette Lepetit; Alain Gellé

• Book ID: 104079291
• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 201 KB
• Volume: 359-361
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2005.01.393

✦ Synopsis

The present paper studies, using ab initio calculations, the influence of the incommensurate structural modulations on the low-energy physics of the Sr 14Àx Ca x Cu 24 O 41 oxides. On-site, nearest-neighbor and next-nearest-neighbor effective parameters were computed within a t À J þ V model based on the copper oxide layers. The structural modulations appear to be the key degree of freedom, responsible for the low-energy properties such as the electron localization, the formation of dimers in the x ¼ 0 compound or the anti-ferromagnetic order in the x ¼ 13:6 compound.