Is Li${}_2$Pd${}_3$B a self-doped hole superconductor ?

Abstract

We propose that the electrons responsible for superconductivity in Li2Pd3B come from the palladium 4d-electrons. So, its electronic properties are likely to be dominated by strong electronic correlations. The basic unit in this material are Pd${}_6$B octahedra which share vertices to form a 3-dimensional network. Due to the highly distorted nature of the Pd${}_6$B octahedron, one far stretched Pd atom per octahedra becomes almost inactive for electronic conduction. Thus, the material escapes the fate of becoming a half- filled insulating Mott antiferromagnet by hiding extra charges at these inactive Pd sites and becomes a self-doped correlated metal. We propose a 3-dimensional single band t-J model which could be the correct minimal model for this material.

arXiv comment4 pages Revtex, 2 figures included in the text, some typos corrected, some text and references added

References in corpus (5)

• Projected Wavefunctions and High Temperature Superconductivity
• Superconductivity in the two-dimensional t-J model
• Superconductivity and Electronic Structure of Perovskite MgCNi3
• Anisotropic resistivity and Hall effect in MgB2 single crystals
• Mott Insulator to high \tc Superconductor via Pressure: Resonating Valence Bond theory and prediction of new Systems

Cited by in corpus (5)

• Crystal Symmetry, Electron-Phonon Coupling, and Superconducting Tendencies in Li${}_2$Pd${}_3$B and Li${}_2$Pt${}_3$B
• Magnetization measurements on Li2Pd3B superconductor
• Electronic structure of Li2Pd3B and Li2Pt3B
• Landau and Ott scaling for the kinetic energy density and the low $T_c$ conventional superconductors, $L{i}_{2}P{d}_{3}B$ and Nb
• Discovery of Li2(Pd,Pt)3B superconductors