Spontaneous internal field around the non-magnetic impurity in spin-triplet p-wave superconductivity

2005 ◽  
Vol 29 (3-4) ◽  
pp. 619-623
Author(s):  
M. Takigawa ◽  
M. Ichioka ◽  
K. Kuroki ◽  
Y. Tanaka
Keyword(s):  
Magnetic Impurity ◽  
Internal Field ◽  
P Wave ◽  
Spin Triplet

Coexistence of spin-singlet s- and d-wave and spin-triplet p-wave order parameters in anisotropic superconductors

2007 ◽  
Vol 244 (10) ◽  
pp. 3559-3571 ◽  
Author(s):  
R. Gonczarek ◽  
M. Krzyzosiak ◽  
L. Jacak ◽  
A. Gonczarek
Keyword(s):  
Order Parameters ◽  
P Wave ◽  
Spin Singlet ◽  
Anisotropic Superconductors ◽  
Spin Triplet ◽  
D Wave

Pseudogap and Unconventional Pairing in the Hubbard Model

1998 ◽  
Vol 12 (29n31) ◽  
pp. 2939-2945 ◽  
Author(s):  
Y. M. Malozovsky ◽  
J. D. Fan
Keyword(s):  
Hubbard Model ◽  
P Wave ◽  
Perturbation Approach ◽  
S Wave ◽  
Orbital State ◽  
Adequate Model ◽  
Hubbard Models ◽  
Spin Singlet ◽  
Spin Triplet ◽  
Spin Response

The attractive (U < 0) and repulsive (U > 0) Hubbard models have been studied using the Fermi liquid perturbation approach. The attractive Hubbard model (U < 0) is an adequate model for 3 He , an incompressible and strongly paramagnetic liquid [Formula: see text], [Formula: see text] for |U|N F = 0.9) with a pseudogap in the charge response. A pairing instability and superfluidity for U < 0 exists in the spin channel only: spin-triplet with l = 0, or spin-singlet with l = 1 (p-wave orbital state j = s + l = 1), where l is the orbital momentum of a pair. The repulsive Hubbard model (U > 0) represents a highly compressible and nearly antiferromagnetic liquid [Formula: see text], [Formula: see text] for UN F = 0.9) with a pseudogap in the spin response. However, for U > 0 a pairing instability and superconductivity exist in the charge channel only: spin-singlet with l = 0 (s-wave), or with l = 2 (d-wave) in the case of an anisotropic Fermi surface.

scholarly journals Triplet p-wave pairing correlation in low-doped zigzag graphene nanoribbons

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Tianxing Ma ◽  
Fan Yang ◽  
Zhongbing Huang ◽  
Hai-Qing Lin
Keyword(s):  
Monte Carlo ◽  
Ground State ◽  
Quantum Monte Carlo ◽  
Graphene Nanoribbons ◽  
Random Phase ◽  
P Wave ◽  
Pairing Correlation ◽  
Wave Pairing ◽  
Spin Triplet ◽  
Zigzag Graphene Nanoribbons

Abstract We reveal an edge spin triplet p–wave superconducting pairing correlation in slightly doped zigzag graphene nanoribbons. By employing a method that combines random-phase approximation, the finite-temperature determinant quantum Monte Carlo approach, and the ground-state constrained-path quantum Monte Carlo method, it is shown that such a spin-triplet pairing is mediated by the ferromagnetic fluctuations caused by the flat band at the edge. The spin susceptibility and effective pairing interactions at the edge strongly increase as the on-site Coulomb interaction increases, indicating the importance of electron-electron correlations. It is also found that the doping-dependent ground-state p-wave pairing correlation bears some similarity to the famous superconducting dome in the phase diagram of a high-temperature superconductor, while the spin correlation at the edge is weakened as the system is doped away from half filling.

scholarly journals Instability of Majorana states in Shiba chains due to leakage into a topological substrate

2021 ◽  
Author(s):  
Nicholas Sedlmayr ◽  
Cristina Bena
Keyword(s):  
Magnetic Impurity ◽  
P Wave ◽  
S Wave ◽  
Topological Transition ◽  
Wave Pairing

Abstract We revisit the problem of Majorana states in chains of scalar impurities deposited on a superconductor with a mixed s-wave and p-wave pairing. We also study the formation of Majorana states for magnetic impurity chains. We find that the magnetic impurity chains exhibit well-localized Majorana states when the substrate is trivial, but these states hybridize and get dissolved in the bulk when the substrate is topological. Most surprisingly, and contrary to previous predictions, the scalar impurity chain does not support fully localized Majorana states except for very small and finely tuned parameter regimes, mostly for a non-topological substrate close to the topological transition. Our results indicate that a purely p-wave or a dominant p-wave substrate are not good candidates to support either magnetic or scalar impurity topological Shiba chains.

Spin-Triplet p -Wave Superconductivity Revealed under High Pressure in UBe13

2019 ◽  
Vol 122 (6) ◽  
Author(s):  
Yusei Shimizu ◽  
Daniel Braithwaite ◽  
Dai Aoki ◽  
Bernard Salce ◽  
Jean-Pascal Brison
Keyword(s):  
High Pressure ◽  
P Wave ◽  
Spin Triplet
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