Possible spin triplet superconductivity in Na${}_x$CoO${}_2\cdot y$H${}_2$0

Abstract

Combining symmetry based considerations with inputs from available experimental results, we make the case that a novel spin-triplet superconductivity triggered by antiferromagnetic fluctuations may be realized in the newly discovered layered cobaltide Na${}_x$CoO${}_2\cdot y$H${}_2$O. In the proposed picture, unaccessable via resonating-valence-bond physics extrapolated from half-filling, the pairing process is similar to that advanced for Sr${}_2$RuO${}_4$, but enjoys a further advantage coming from the hexagonal structure of the Fermi-surface which gives a stronger pairing tendency.

4 pages

References in corpus (2)

• An Electronic Model for $Co{O}_2$ layer based systems: Chiral RVB metal and Superconductivity
• Unconventional Upper- and Lower-Critical Fields and Normal-State Magnetic Susceptibility of the Novel Superconducting Compound $N{a}_{0.35}Co{O}_2\cdot 1.3H_{2}O$

Cited by in corpus (52)

• Superconductivity Phase Diagram of Na(x)CoO(2).1.3H(2)O
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• Ferromagnetic in-plane spin fluctuations in NaxCoO2 observed by neutron inelastic scattering
• Magnetic Correlation of NaxCoO2 and Successive Phase Transitions of Na0.5CoO2 -NMR and Neutron Diffraction Studies-
• Possible spin-triplet $f$-wave pairing due to disconnected Fermi surfaces in Na${}_x$CoO${}_2\cdot y$H${}_2$O
• Doping effects on the electronic and structural properties of CoO2: An LSDA+U study
• The crystal growth and characterization of NaxCoO2 and NaxCoO2yH2O
• Charge ordering and magneto-polarons in Na${}_{0.82}$CoO${}_2$
• Metamagnetic Transition in Na${}_{0.85}$CoO${}_2$ Single Crystals
• Spin singlet pairing in the superconducting state of NaxCoO2\cdot1.3H2O: evidence from a ^{59}Co Knight shift in a single crystal
• Multi-orbital analysis on the Superconductivity in Na_{x}CoO_{2} \cdot y H_{2}O
• Low energy electronic states and triplet pairing in layered cobaltates
• Evidence of nodal superconductivity in Na_0.35CoO2-1.3H_2O: a specific heat study
• Possible unconventional superconductivity in Na${}_x$CoO${}_2$yH${}_2$O probed by $\mu$SR
• Low-Temperature and High-Energy-Resolution Laser Photoemission Spectroscopy
• 59Co-NMR Knight Shift of Aligned Crystals and Polycrystalline Samples of Superconducting Na0.3CoO2.1.3H2O
• Variational Monte Carlo Studies of Pairing Symmetry for the t-J Model on a Triangular Lattice
• Impurity and interface bound states in $d_{x^2-y^2}+i{d}_{xy}$ and $p_x+i{p}_y$ superconductors
• Competition between singlet and triplet pairings in Na_xCoO_2 yH_2O
• Anomalous electronic Raman scattering in Na_xCoO_2 H_2O
• Spontaneous edge current in a small chiral superconductor with a rough surface
• An ab-initio evaluation of the local effective interactions in the superconducting compound $Na\_0.35CoO\_2-1.3H\_2O$
• Possible Spin-triplet Superconductivity in NaxCoO2yH2O - 59Co NMR Study
• Impurity Effects on the Superconducting Transition Temperature of NazCoO2.yH2O
• First principles lattice dynamics of NaCoO${}_2$
• Elliptical hole pockets in the Fermi surfaces of unhydrated and hydrated sodium cobalt oxides
• Possible singlet to triplet pairing transition in NaxCoO2 H2O
• Shubnikov de Haas effect in the metallic state of Na${}_{0.3}$CoO${}_2$
• Laser-excited ultrahigh-resolution photoemission spectroscopy of NaxCoO2.yH2O:Evidence for pseudogap formation
• Superconducting Properties under Magnetic Field in Na${}_{0.35}$CoO${}_2\cdot 1.3$H${}_2$O Single Crystal
• Magnetic properties of superconducting cobalt oxides NaxCoO2.yH2O
• Effect of Na content and hydration on the excitation spectrum of the cobaltite Na_xCoO_2 yH_2O
• Possible Pairing Symmetry of Superconductor Na_xCoO_2yH_2O
• Vortex State in Na_xCoO_2.yH_2O: p_x\pm ip_y-wave versus d_{x^2-y^2}\pm id_{xy}-wave Pairing
• Impurity Effect on Kramer-Pesch Core Shrinkage in s-Wave Vortex and Chiral p-Wave Vortex
• Electronic Structure of Sodium Cobalt Oxide: Comparing Mono- and Bilayer-hydrate
• The role of the water molecules in novel superconductor, Na${}_{0.35}$CoO${}_2\cdot$1.3H${}_2$O
• Search for Magnetic Excitation Spectra of NaxCoO2.yD2O -Neutron Scattering-
• Electron-phonon interaction dressed by electronic correlations near charge ordering as the origin for superconductivity in cobaltates
• Dynamical magnetic susceptibility in the lamellar cobaltate superconductor Na_xCoO_2$\cdot y$H_2O
• Andreev Edge State on Semi-Infinite Triangular Lattice: Detecting the Pairing Symmetry in Na_0.35CoO_2.yH_2O
• Robustness of chiral surface current and subdominant $s$-wave Cooper pairs
• Proton incorporations and superconductivity in a cobalt oxyhydrate
• Numerical study of magnetic and pairing correlation in bilayer triangular lattice
• Identifying the pairing symmetry in sodium cobalt oxide by Andreev edge states
• A possibility of high spin hole states in doped CoO${}_2$ layered systems
• Upper critical field of aligned Na_{x}(H_{3}O)_{z}CoO_{2}\cdot yH_{2}O superconductor by magnetization measurement
• Nuclear Spin Relaxation Rate of Disordered $p_x+i{p}_y$-wave Superconductors
• Bulk-boundary correspondence in Josephson Junctions
• Electronic Raman scattering in superconductors on triangle lattices
• Magnetic fluctuation and dominant superconducting pairing symmetry near the tunable Van Hove singularity
• Absence of spin susceptibility decrease in a bulk organic superconductor with triangular lattice