On the origin of the anomalous upper critical field in quasi–one-dimensional superconductors

@article{Fuseya2012OnTO,
  title={On the origin of the anomalous upper critical field in quasi–one-dimensional superconductors},
  author={Yuki Fuseya and Claude Bourbonnais and Kazumasa Miyake},
  journal={EPL},
  year={2012},
  volume={100},
  pages={57008}
}
The upper critical field, Hc2, in quasi-1D superconductors is investigated by the weak coupling renormalization group technique. It is shown that Hc2 greatly exceeds not only the Pauli limit, but also the conventional paramagnetic limit of the Flude-Ferrell-Larkin-Ovchinnikov (FFLO) state. This increase is mainly due to the quasi-1D fluctuations effect as triggered by interference between unconventional superconductivity and density-wave instabilities. Our results give a novel viewpoint on the… 
6 Citations

Figures from this paper

Novel superconducting phenomena in quasi-one-dimensional Bechgaard salts
Abstract It is the saturation of the transition temperature T c in the range of 24 K for known materials in the late sixties that triggered the search for additional materials offering new coupling
Dimensional Crossover of the Fulde–Ferrell–Larkin–Ovchinnikov State in Strongly Pauli-Limited Quasi-One-Dimensional Superconductors
The Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) state is examined in quasi-one-dimensional s- and d-wave superconductors with particular attention paid to the effect of the Fermi-surface anisotropy. The
The influence of the dimensionality of the system on the realization of unconventional Fulde-Ferrell-Larkin-Ovchinnikov pairing in ultra-cold Fermi gases.
  • A. Ptok
  • Physics, Medicine
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2017
TLDR
This work investigates the influence of a dimensional crossover (from one dimension (1D) to two dimensions (2D) or three dimensions (3D)) on the stability of the FFLO state in the spin-imbalanced attractive Hubbard model.
Evidence for two energy gaps and Fermi liquid behavior in the SrPt 2 As 2 superconductor
We report a detailed calorimetric study on single crystals of the 5$d$-transition metal pnictide SrPt2As2 with a superconducting critical temperature $T_c$ $\sim$5K. The peculiar field dependence of
Coexistent symmetries in a two-band organic superconductor
Abstract We have revisited the phase diagram of perchlorate Bechgaard salts under magnetic field at small temperature, using a spin ladder model with a Hubbard Hamiltonian. Using a non-perturbative
Organic superconductors: The Bechgaard salts and relatives
Abstract Organic conductors were originally considered a route to achieving high temperature superconductivity. While that goal could not be met, what came to be was a class of materials in which the

References

SHOWING 1-10 OF 60 REFERENCES
Quasi-one-dimensional superconductors in strong magnetic field.
We determine the phase diagram of a quasi-one-dimensional superconductor (weakly coupled chains system with an [ital open] [ital Fermi] [ital surface]) in a magnetic field. The usual Ginzburg-Landau
Impurity-controlled superconductivity/spin density wave interplay in the organic superconductor: (TMTSF)2ClO4
The study of the anion ordered (TMTSF)2ClO4(1 − x)ReO4x solid solution in the limit of a low ReO4− substitution level (0 ≤ x ≤ 17%) has revealed a new and interesting phase diagram. Superconductivity
Symmetries of the quasi-1D Bechgaard salts superconducting state in an applied magnetic field
We investigate the possible superconducting pairing symmetries which would account for the latest experimental results on the Bechgaard salts. Using a renormalization group (RG) technique we
Magnetic-field induced singlet-triplet phase transition in quasi one-dimensional organic superconductors
We propose a theoretical model of quasi–one-dimensional superconductors, with attractive electron-electron interactions dominant in the singlet d-wave channel and sub-dominant in the p-wave channel.
Anomalous in-plane anisotropy of the onset of superconductivity in (TMTSF)2ClO4.
We report the magnetic-field amplitude and field-angle dependence of the superconducting onset temperature Tconset of the organic superconductor (TMTSF)2ClO4 in magnetic fields H accurately aligned
Mechanism for the Singlet to Triplet Superconductivity Crossover in Quasi-One-Dimensional Organic Conductors
Superconductivity of quasi-one-dimensional organic conductors with a quarter-filled band is investigated using the two-loop renormalization group approach to the extended Hubbard model for which both
Magnetic-Field Variations of the Pair-Breaking Effects of Superconductivity in (TMTSF)2ClO4
We have studied the onset temperature of the superconductivity T c onset of the organic superconductor (TMTSF) 2 ClO 4 , by precisely controlling the direction of the magnetic field H . We compare
Breakdown of Landau–Fermi Liquid in Two Dimensions Due to Umklapp Scattering
We study the renormalization group flow of the interactions in the two-dimensional t-t' Hubbard model near half filling in a N-patch representation of the whole Fermi surface. Starting from weak to
Extended quantum criticality of low-dimensional superconductors near a spin-density-wave instability
We use the renormalization group method to study the normal state of quasi-one-dimensional superconductors nearby a spin-density-wave instability. On the basis of one-loop scattering amplitudes for
Triplet superconducting pairing and density-wave instabilities in organic conductors.
TLDR
Using a renormalization group approach, an extended quasi-one-dimensional electron gas model is determined that includes interchain hopping, nesting deviations, and both intrachain and interchain repulsive interactions, including the coexistence of spin-density-wave and charge- density-wave phases and the possibility of a triplet pairing in the superconducting phase.
...
1
2
3
4
5
...