A Model for Liquid-Striped Liquid Phase Separation in Liquids of Anisotropic Polarons

作者：Innocenti D; Ricci A; Poccia N; Campi G; Fratini M; Bianconi Antonio^*

来源：Journal of Superconductivity and Novel Magnetism, 2009, 22(6): 529-533.

DOI：10.1007/s10948-009-0474-9

• Phase separation
• Critical point
• Spinodal lines
• Phase diagrams
• Van der Waals
• Anisotropic interactions
• Polaron liquids

The phase separation between a striped polaron liquid at the particular density and a high density polaron liquid is described by a modified Van der Waals scheme. The striped polaron liquid represents the pseudo gap matter or Wigner-like polaron phase at 1/8 doping in cuprate superconductors. The model includes the tendency of pseudo-Jahn-Teller polarons to form anisotropic directional bonds at a preferential volume with the formation of different "liquid phases". The model gives the coexistence of a first low density polaron striped liquid and a second high density liquid that appears in cuprate superconductors for doping larger than 1/8. We discuss how the strength of anisotropic bonds controls the variation the phase separation scenarios for complex systems in the presence of a quantum critical point where the phase separation vanishes.

• 出版日期2009-8