UNICA IRIS Institutional Research Information System
IRIS è il sistema di gestione integrata dei dati della ricerca (persone, progetti, pubblicazioni, attività) adottato dall'Università degli Studi di Cagliari dal mese di luglio 2015.
EnglishWe describe, from advanced first principles calculations, the energetics of oxygen doping and its relation to insulator-metal transitions in underdoped YBa2Cu3O6+x. We find a strong tendency of doping oxygens to order into nonmagnetic Cu1+Ox chains at any x. Ordering produces one-dimensional metallic bands, while configurations with nonaligned oxygens are insulating. The Cu2+O2 planes remain insulating and antiferromagnetic up to a threshold between x=0.25 and 0.5, above which a paramagnetic normal-metal state prevails. The in-plane antiferroparamagnetic competition depends on x but only weakly on the ordering state of the chains.
Scheda prodotto non validato
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo
| Titolo: | Chain metallicity and competition between paramagnetism and antiferromagnetism in underdoped YBa2Cu3O6+x: A first principles description |
| Autori: | |
| Data di pubblicazione: | 2008 |
| Rivista: | |
| Abstract: | We describe, from advanced first principles calculations, the energetics of oxygen doping and its relation to insulator-metal transitions in underdoped YBa2Cu3O6+x. We find a strong tendency of doping oxygens to order into nonmagnetic Cu1+Ox chains at any x. Ordering produces one-dimensional metallic bands, while configurations with nonaligned oxygens are insulating. The Cu2+O2 planes remain insulating and antiferromagnetic up to a threshold between x=0.25 and 0.5, above which a paramagnetic normal-metal state prevails. The in-plane antiferroparamagnetic competition depends on x but only weakly on the ordering state of the chains. |
| Handle: | http://hdl.handle.net/11584/40403 |
| Tipologia: | 1.1 Articolo in rivista |
File in questo prodotto:
Copyright © 2021