Superconducting pairing in Sr 2 RuO 4 from weak to intermediate coupling

@article{Zhang2017SuperconductingPI,
  title={Superconducting pairing in Sr 2 RuO 4 from weak to intermediate coupling},
  author={Li-Da Zhang and Wen Huang and Fan Yang and Hong Yao},
  journal={Physical Review B},
  year={2017},
  volume={97},
  pages={060510}
}
The unconventional superconductivity in Sr$_2$RuO$_4$ continues to attract considerable interest. While many measurements can be interpreted on the basis of chiral $p$-wave pairing with intriguing topological character, a number of exceptions hinder an unambiguous verification of such pairing. The pairing mechanism also remains under debate. In this paper, with effects of the sizable spin-orbit coupling accounted for, we reexamine the superconducting instabilities in Sr$_2$RuO$_4$ through… 

Figures from this paper

Exotic Cooper pairing in multiorbital models of Sr2RuO4
The unconventional superconductivity in Sr$_2$RuO$_4$ continues to defy a unified interpretation. In this paper, we focus on some novel aspects of its superconducting pairing by exploiting the
Higher-order topological superconductivity: Possible realization in Fermi gases and Sr2RuO4
We propose to realize second-order topological superconductivity in bilayer spin-polarized Fermi gas superfluids. We focus on systems with intralayer chiral $p$-wave pairing and with tunable
Superconducting order of Sr2RuO4 from a three-dimensional microscopic model
We compute and compare even- and odd-parity superconducting order parameters of strontium ruthenate ($\mathrm{Sr}_2\mathrm{RuO}_4$) in the limit of weak interactions, resulting from a fully
Superconducting state of Sr2RuO4 in the presence of longer-range Coulomb interactions
The symmetry of the superconducting condensate in Sr2RuO4 remains controversial after nuclear magnetic resonance (NMR) experiments recently overturned the dominant chiral p-wave paradigm. Several
Superconductivity in Sr2RuO4 thin films under biaxial strain
Motivated by the success of experimental manipulation of the band structure through biaxial strain in Sr$_2$RuO$_4$ thin film grown on a mismatched substrate, we investigate theoretically the effects
Spin-orbit coupling and spin-triplet pairing symmetry in Sr2RuO4
Spin-orbit coupling (SOC) plays a crucial role in determining the spin structure of an odd parity psedospin-triplet Cooper pairing state. Here, we present a thorough study of how SOC lifts the
Possibility of mixed helical p-wave pairings in Sr2RuO4
The exact nature of the unconventional superconductivity in Sr2RuO4 remains a mystery. At the phenomenological level, no superconducting order parameter proposed thus far seems able to coherently
Theory of Chiral p-Wave Superconductivity with Near Nodes for Sr_{2}RuO_{4}.
We use the functional renormalization group method to study a three-orbital model for superconducting Sr_{2}RuO_{4}. Although the pairing symmetry is found to be a chiral p wave, the atomic
Possible Three-Dimensional Nematic Odd-Parity Superconductivity in Sr_{2}RuO_{4}.
TLDR
The possibility of odd-parity pairing with inherent three-dimensional character enforced by the interorbital interlayer coupling and the sizable spin-orbit coupling is discussed and a novel time-reversal invariant nematic pairing can be realized.
Higher angular momentum pairings in interorbital shadowed-triplet superconductors: Application to Sr2RuO4
Even-parity interorbital spin-triplet pairing emerges as an intriguing candidate in multiorbital superconductors with significant Hund’s and spin-orbit coupling. Within such a state, the pairing is
...
1
2
3
...

References

SHOWING 1-10 OF 172 REFERENCES
Suppression of spontaneous currents in Sr 2 RuO 4 by surface disorder
A major challenge to the chiral $p$-wave hypothesis for the pairing symmetry of the unconventional superconductor Sr$_2$RuO$_4$ is the null result of sensitive scanning magnetometry experiments
Spin Polarization Enhanced by Spin-Triplet Pairing in Sr$_2$RuO$_4$ Probed by NMR
We report a novel phenomenon intimately related to the spin-triplet superconductivity. It is well known that the spin susceptibility decreases below the superconducting transition temperature in
Identifying the pairing symmetry in the Sr 2 RuO 4 superconductor
We have analyzed heat capacity and thermal conductivity measurements of ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ in the normal and superconducting state and come to the conclusion that an order
Chiral p-wave order in Sr2RuO4.
  • C. Kallin
  • Physics, Medicine
    Reports on progress in physics. Physical Society
  • 2012
TLDR
A broad range of experiments on Sr(2)RuO(4) that are sensitive to p-wave pairing, triplet superconductivity and time-reversal symmetry breaking are reviewed and compared to each other and to theoretical predictions, finding the evidence for triplet pairing is strong, although some puzzles remain.
Evidence from tunneling spectroscopy for a quasi-one-dimensional origin of superconductivity in Sr$_2$RuO$_4$
To establish the mechanism of unconventional superconductivity in Sr$_2$RUO$_4$, a prerequisite is direct information concerning the momentum-space structure of the energy gaps $\Delta_i(k)$, and in
Theory of superconductivity in a three-orbital model of Sr2RuO4
In conventional and high transition temperature copper oxide and iron pnictide superconductors, the Cooper pairs all have even parity. As a rare exception, Sr2RuO4 is the first prime candidate for
Leggett modes and multiband superconductivity in Sr2RuO4
Sr$_2$RuO$_4$ is a prototypical multi-band superconductor with three bands crossing the Fermi level. These bands exhibit distinct dimensional characteristics, with one quasi-2D $\gamma$-band and two
Identifying detrimental effects for multiorbital superconductivity: Application to Sr2RuO4
We propose a general scheme to probe the compatibility of arbitrary pairing states with a given normal state Hamiltonian by the introduction of a concept called superconducting fitness. This quantity
Time-reversal symmetry-breaking superconductivity in Sr2RuO4
Although the properties of most superconducting materials are well described by the theory of Bardeen, Cooper and Schrieffer (BCS), considerable effort has been devoted to the search for exotic
Spin-triplet superconductivity in Sr 2 RuO 4 due to orbital and spin fluctuations: Analyses by two-dimensional renormalization group theory and self-consistent vertex-correction method
We study the mechanism of the triplet superconductivity in Sr2RuO4 based on the multiorbital Hubbard model. The electronic states are studied using the renormalization group method. Thanks to the
...
1
2
3
4
5
...