scholarly journals Spin fluctuations and uncoventional superconducting pairing

2021 ◽  
Vol 70 (1) ◽  
pp. 1-18
Author(s):  
Li Jian-Xin ◽  
◽  
Keyword(s):  
Spin Fluctuations ◽  
Superconducting Pairing

scholarly journals Superconducting pairing mediated by spin fluctuations from first principles

2014 ◽  
Vol 90 (21) ◽  
Author(s):  
F. Essenberger ◽  
A. Sanna ◽  
A. Linscheid ◽  
F. Tandetzky ◽  
G. Profeta ◽  
...  
Keyword(s):  
First Principles ◽  
Spin Fluctuations ◽  
Superconducting Pairing

Spin fluctuations, Fermi surface hotspots and nesting in PuCoGa5

2014 ◽  
Vol 1683 ◽  
Author(s):  
Matthias J. Graf ◽  
Tanmoy Das ◽  
Jian-Xin Zhu
Keyword(s):  
Spin Fluctuation ◽  
Pairing Symmetry ◽  
Spin Fluctuations ◽  
Gap Functions ◽  
Fermi Surfaces ◽  
Unconventional Superconductors ◽  
Magnetic Spin ◽  
The Many ◽  
Superconducting Pairing ◽  
Strong Spin

ABSTRACTSurprisingly little is known about the mechanism and symmetry of superconducting pairing in PuCoGa5. A common thread with other unconventional superconductors is the presence of spin fluctuations in the normal state, which in this particular case is controlled by strong spin–orbit coupling split bands. The many and anisotropic Fermi surfaces make the guessing of the potential spin-fluctuation nesting vector and resulting symmetry of the pairing function a nontrivial task. To provide much needed guidance for the identification of the pairing symmetry in this multiband superconductor, we perform first-principles based magnetic spin susceptibility calculations to identify the dominant nesting vectors that potentially give rise to interband pairing with nodal d- or s±-wave gap functions.

KONDO EFFECT AND LOCALIZED SPIN FLUCTUATIONS IN THE Zn-TRANSITION METAL SYSTEM

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-221-C1-223
Author(s):  
P. J. FORD ◽  
C. RIZZUTO ◽  
E. SALAMONI ◽  
P. ZANI
Keyword(s):  
Transition Metal ◽  
Kondo Effect ◽  
Spin Fluctuations ◽  
Metal System ◽  
Transition Metal System

TRANSVERSE SPIN FLUCTUATIONS IN γ - Mn (37 % Fe) ALLOY

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-183-C8-184 ◽  
Author(s):  
J. J. Milczarek ◽  
K. Mikke ◽  
E. Jaworska
Keyword(s):  
Spin Fluctuations ◽  
Transverse Spin

scholarly journals Evolution of spin excitations from bulk to monolayer FeSe

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jonathan Pelliciari ◽  
Seher Karakuzu ◽  
Qi Song ◽  
Riccardo Arpaia ◽  
Abhishek Nag ◽  
...  
Keyword(s):  
Quantum Monte Carlo ◽  
Spin Dynamics ◽  
Spin Fluctuations ◽  
Superconducting Transition ◽  
Pairing Mechanism ◽  
Range Magnetic Order ◽  
X Ray Scattering ◽  
Spin Excitations ◽  
Order Of Magnitude ◽  
Long Range Magnetic Order

AbstractIn ultrathin films of FeSe grown on SrTiO3 (FeSe/STO), the superconducting transition temperature Tc is increased by almost an order of magnitude, raising questions on the pairing mechanism. As in other superconductors, antiferromagnetic spin fluctuations have been proposed to mediate SC making it essential to study the evolution of the spin dynamics of FeSe from the bulk to the ultrathin limit. Here, we investigate the spin excitations in bulk and monolayer FeSe/STO using resonant inelastic x-ray scattering (RIXS) and quantum Monte Carlo (QMC) calculations. Despite the absence of long-range magnetic order, bulk FeSe displays dispersive magnetic excitations reminiscent of other Fe-pnictides. Conversely, the spin excitations in FeSe/STO are gapped, dispersionless, and significantly hardened relative to its bulk counterpart. By comparing our RIXS results with simulations of a bilayer Hubbard model, we connect the evolution of the spin excitations to the Fermiology of the two systems revealing a remarkable reconfiguration of spin excitations in FeSe/STO, essential to understand the role of spin fluctuations in the pairing mechanism.

scholarly journals Neutron scattering studies on spin fluctuations in Sr2RuO4

2021 ◽  
Vol 103 (10) ◽  
Author(s):  
K. Jenni ◽  
S. Kunkemöller ◽  
P. Steffens ◽  
Y. Sidis ◽  
R. Bewley ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Spin Fluctuations
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