Collective spin 1 singlet phase in high-pressure oxygen (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Collective spin 1 singlet phase in high-pressure oxygen (Articolo in rivista) (literal)

Anno

• 2014-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1073/pnas.1404590111 (literal)

Alternative label

• Crespo, Yanier; Fabrizio, Michele; Scandolo, Sandro; Tosatti, Erio (2014)
  Collective spin 1 singlet phase in high-pressure oxygen
  in Proceedings of the National Academy of Sciences of the United States of America
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Crespo, Yanier; Fabrizio, Michele; Scandolo, Sandro; Tosatti, Erio (literal)

Pagina inizio

• 10427 (literal)

Pagina fine

• 10432 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 111 (literal)

Rivista

• Proceedings of the National Academy of Sciences of the United States of America (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

• 6 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 29 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Abdus Salam International Centre for Theoretical Physics; International School for Advanced Studies; Consiglio Nazionale delle Ricerche (CNR) (literal)

Titolo

• Collective spin 1 singlet phase in high-pressure oxygen (literal)

Abstract

• Oxygen, one of the most common and important elements in nature, has an exceedingly well-explored phase diagram under pressure, up to and beyond 100 GPa. At low temperatures, the low-pressure antiferromagnetic phases below 8 GPa where O-2 molecules have spin S = 1 are followed by the broad apparently nonmagnetic epsilon phase from about 8 to 96 GPa. In this phase, which is our focus, molecules group structurally together to form quartets while switching, as believed by most, to spin S = 0. Here we present theoretical results strongly connecting with existing vibrational and optical evidence, showing that this is true only above 20 GPa, whereas the S = 1 molecular state survives up to about 20 GPa. The epsilon phase thus breaks up into two: a spinless epsilon(0) (20-96 GPa), and another epsilon(1) (8-20 GPa) where the molecules have S = 1 but possess only short-range antiferromagnetic correlations. A local spin liquid-like singlet ground state akin to some earlier proposals, and whose optical signature we identify in existing data, is proposed for this phase. Our proposed phase diagram thus has a first-order phase transition just above 20 GPa, extending at finite temperature and most likely terminating into a crossover with a critical point near 30 GPa and 200 K. (literal)

Prodotto di

• MD.P06.024.001 Fluidi quantistici e sistemi elettronici fortemente correlati alla nanoscala e in dispositivi (MD.P06.024.002) (Modulo)
• MD.P06.025.001 Teoria, simulazione e progetto assistito dal calcolatore di materiali nanostrutturati (MD.P06.025.002) (Modulo)

Autore CNR

• ERIO TOSATTI (Unità di personale esterno)
• MICHELE FABRIZIO (Persona)

Insieme di parole chiave

• Parole chiave di "Collective spin 1 singlet phase in high-pressure oxygen" (Insieme di parole chiave)

Incoming links:

Autore CNR di

• MICHELE FABRIZIO (Persona)
• ERIO TOSATTI (Unità di personale esterno)

Prodotto

• MD.P06.024.001 Fluidi quantistici e sistemi elettronici fortemente correlati alla nanoscala e in dispositivi (MD.P06.024.002) (Modulo)
• MD.P06.025.001 Teoria, simulazione e progetto assistito dal calcolatore di materiali nanostrutturati (MD.P06.025.002) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Proceedings of the National Academy of Sciences of the United States of America (Rivista)

Insieme di parole chiave di

• Parole chiave di "Collective spin 1 singlet phase in high-pressure oxygen" (Insieme di parole chiave)