Ab initio prediction of pressure-induced superconductivity in potassium (Articolo in rivista)

Type

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

Label

• Ab initio prediction of pressure-induced superconductivity in potassium (Articolo in rivista) (literal)

Anno

• 2006-01-01T00:00:00+01:00 (literal)

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

• 10.1103/PhysRevB.73.144512 (literal)

Alternative label

• Sanna, A; Franchini, C; Floris, A; Profeta, G; Lathiotakis, NN; Luders, M; Marques, MAL; Gross, EKU; Continenza, A; Massidda, S (2006)
  Ab initio prediction of pressure-induced superconductivity in potassium
  in Physical review. B, Condensed matter and materials physics
  (literal)

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

• Sanna, A; Franchini, C; Floris, A; Profeta, G; Lathiotakis, NN; Luders, M; Marques, MAL; Gross, EKU; Continenza, A; Massidda, S (literal)

Pagina inizio

• 144512 (literal)

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

• http://prb.aps.org/abstract/PRB/v73/i14/e144512 (literal)

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

• 73 (literal)

Rivista

• Physical review. B, Condensed matter and materials physics (Rivista)

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

• 14 (literal)

Note

• ISI Web of Science (WOS) (literal)

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

• Univ Cagliari, SLACS, INFM,CNR,Dipartimento Sci Fis, Sardinian Lab Computat Mat Sci, I-09124 Monserrato, CA, Italy; Univ Vienna, Inst Phys Chem, A-1090 Vienna, Austria; Ctr Computat Mat Sci, A-1090 Vienna, Austria; Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, Germany; Univ Aquila, Dipartimento Fis, I-67010 Coppito, Laquila, Italy; CNR, CASTI, INFM, I-67010 Coppito, Laquila, Italy; SERC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England (literal)

Titolo

• Ab initio prediction of pressure-induced superconductivity in potassium (literal)

Abstract

• We report first principles calculations of the superconducting properties of fcc potassium under high pressure. Using a completely ab initio method we predict a superconducting phase transition at 18 GPa. A maximum critical temperature of about 2 K is observed around 23 GPa, the pressure at which the crossover between the fcc phase and the KIII structure experimentally occurs. At higher pressure, when the fcc phase is experimentally unstable, we find, in the phononically stable range, values of T-c up to 11 K. In order to understand the underlying mechanisms inducing superconductivity in potassium, we study the effect of pressure on the electronic and vibrational properties, showing a progressive phonon softening near the K point of the Brillouin zone and a concomitant enhancement of the electron-phonon coupling constant lambda. Interestingly, we find that the pressure induced s-d charge transfer causes an increasing anisotropy of the superconducting gap Delta. Although similar to dense Li in many respects, K displays interesting peculiar features. (literal)

Prodotto di

• Materiali funzionali e dispositivi (MD.P04.012.001) (Modulo)
• Teoria e modeling computazionale di materiali e processi per le nanoscienze (MD.P06.014.001) (Modulo)

Autore CNR

• SANDRO MASSIDDA (Persona)

Insieme di parole chiave

• Keywords of "Ab initio prediction of pressure-induced superconductivity in potassium" (Insieme di parole chiave)

Incoming links:

Autore CNR di

• SANDRO MASSIDDA (Persona)

Prodotto

• Teoria e modeling computazionale di materiali e processi per le nanoscienze (MD.P06.014.001) (Modulo)
• Materiali funzionali e dispositivi (MD.P04.012.001) (Modulo)

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

• Physical review. B, Condensed matter and materials physics (Rivista)

Insieme di parole chiave di

• Keywords of "Ab initio prediction of pressure-induced superconductivity in potassium" (Insieme di parole chiave)