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Simple-to-Complex Transformation in Liquid Rubidium

  Articoli su Riviste JCR/ISI  (anno 2018)

Autori:  Gorelli FA., De Panfilis S., Bryk T., Ulivi L., Garbarino G., Parisiades P., Santoro M

Affiliazione Autori:  [Gorelli, Federico A.; Santoro, Mario] INO CNR, I-50019 Sesto Fiorentino, Italy and European Lab Non Linear Spect, LENS, I-50019 Sesto Fiorentino, Italy. [De Panfilis, Simone] Ist Italiano Tecnol, Ctr Life Nano Sci IIT Sapienza, I-00161 Rome, Italy. [Bryk, Taras] NASU, Inst Condensed Matter Phys, UA-79011 Lvov, Ukraine. [Ulivi, Lorenzo] IFAC CNR, I-50019 Sesto Fiorentino, Italy. [Garbarino, Gaston; Parisiades, Paraskevas] European Synchrotron Res Facil, FR-38043 Grenoble, France.

Riassunto:  We investigated the atomic structure of liquid Rb along an isothermal path at 573 K, up to 23 GPa, by X-ray diffraction measurements. By raising the pressure, we observed a liquid-liquid transformation from a simple metallic liquid to a complex one. The transition occurs at 7.5 +/- 1 GPa which is slightly above the first maximum of the T-P melting line. This transformation is traced back to the density-induced hybridization of highest electronic orbitals leading to the accumulation of valence electrons between Rb atoms and to the formation of interstitial atomic shells, a behavior that Rb shares with Cs and is likely to be common to all alkali metals.

Rivista/Giornale:  THE JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume n.:  9 (11)      Pagine da: 2909  a: 2913
DOI: 10.1021/acs.jpclett.8b01094

   *Citazioni: 3
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  21/07/2019

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