Asymmetric doping dependence of superconductivity between hole- and electron-doped triangular-lattice superconductors

Abstract

Within the framework of kinetic-energy-driven superconductivity, the asymmetric doping dependence of superconductivity between the hole- and electron-doped triangular-lattice superconductors has been studied. It is shown that although the superconducting transition temperature has a dome-shaped doping dependence for both the hole- and electron-doped triangular-lattice superconductors, superconductivity appears over a wide doping of range in the hole-doped case, while it only exists in a narrow range of the doping in the electron-doped side. Moreover, the maximum superconducting transition temperature around the optimal doping in the electron-doped triangular-lattice superconductors is lower than that of the hole-doped counterparts. The theory also shows that the asymmetric doping dependence of superconductivity between the hole- and electron-doped cases may be a common feature for a doped Mott insulator.

6 pages, 2 figures; accepted for publication in Mod. Phys. Lett. B

References in corpus (23)

• Long range Neel order in the triangular Heisenberg model
• Superconductivity Phase Diagram of Na(x)CoO(2).1.3H(2)O
• An Electronic Model for $Co{O}_2$ layer based systems: Chiral RVB metal and Superconductivity
• Spontaneous Magnon Decays
• Progress in Neutron Scattering Studies of Spin Excitations in High-Tc Cuprates
• Mottness: Identifying the Propagating Charge Modes in doped Mott Insulators
• Doped t-J Model on a Triangular Lattice: Possible Application to Na${}_x$CoO${}_2\cdot y$H${}_2$0 and Na${}_{1-x}$TiO${}_2$
• Instabilities of interacting electrons on the triangular lattice
• Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by "protect annealing"
• Anisotropic chiral d+id superconductivity in NaxCoO2 yH2O
• Revised superconducting phase diagram of hole doped Na${}_x$(H${}_3$O)${}_z$CoO${}_2\cdot y$H${}_2$O
• Magnetism and superconductivity of strongly correlated electrons on the triangular lattice
• Nodal $d+id$ pairing and topological phases on the triangular lattice: unconventional superconducting state of Na${}_x$CoO${}_2\cdot y$H${}_2$O
• Kinetic-energy driven superconductivity in cuprate superconductors
• Variational Monte Carlo Studies of Pairing Symmetry for the t-J Model on a Triangular Lattice
• Valence and Na content dependences of superconductivity in NaxCoO2.yH2O
• Two gaps with one energy scale in cuprate superconductors
• 59Co Nuclear Quadrupole Resonance Studies of Superconducting and Non-superconducting Bilayer Water Intercalated Sodium Cobalt Oxides NaxCoO2.yH2O
• Charge transport of electron doped Mott insulators on a triangular lattice
• Kinetic energy driven superconductivity in the electron doped cobaltate Na${}_x$CoO${}_2\cdot y$H${}_2$O
• Doping dependence of Meissner effect in triangular-lattice superconductors
• Thermodynamic properties in triangular-lattice superconductors
• Evolution of electron Fermi surface with doping in cobaltates