scholarly journals Spin Fluctuations and Unconventional Superconductivity in the Fe-Based Oxypnictide Superconductor LaFeAsO0.7 Probed by 57Fe-NMR

2009 ◽  
Vol 78 (1) ◽  
pp. 013701 ◽  
Author(s):  
Nobuyuki Terasaki ◽  
Hidekazu Mukuda ◽  
Mitsuharu Yashima ◽  
Yoshio Kitaoka ◽  
Kiichi Miyazawa ◽  
...  
Keyword(s):  
Spin Fluctuations ◽  
Unconventional Superconductivity

scholarly journals Unconventional Superconductivity from Local Spin Fluctuations in the Kondo Lattice

2013 ◽  
Vol 110 (14) ◽  
Author(s):  
Oliver Bodensiek ◽  
Rok Žitko ◽  
Matthias Vojta ◽  
Mark Jarrell ◽  
Thomas Pruschke
Keyword(s):  
Kondo Lattice ◽  
Spin Fluctuations ◽  
Unconventional Superconductivity ◽  
Local Spin

scholarly journals Unconventional Superconductivity and Nearly Ferromagnetic Spin Fluctuations in NaxCoO2·yH2O

2003 ◽  
Vol 72 (12) ◽  
pp. 3041-3044 ◽  
Author(s):  
K. Ishida ◽  
Y. Ihara ◽  
Y. Maeno ◽  
C. Michioka ◽  
M. Kato ◽  
...  
Keyword(s):  
Spin Fluctuations ◽  
Unconventional Superconductivity

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.

Emerging flat bands in large-angle twisted bi-layer graphene under pressures

Nanoscale ◽  
2021 ◽  
Author(s):  
Liangbing Ge ◽  
Ni Kun ◽  
Xiaojun Wu ◽  
Zhengping Fu ◽  
Yalin Lu ◽  
...  
Keyword(s):  
Large Angle ◽  
Magic Angle ◽  
Unconventional Superconductivity ◽  
Flat Bands ◽  
Layer Graphene

Recent experiments on magic-angle twisted bi-layer graphene have attracted an intensive attention due to exotic properties such as unconventional superconductivity and correlated insulation. These phenomena were often found at a...

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