Interplay Of Superconductivity And Magnetic Excitations In Multiorbital Systems

2015 ◽  
Vol 10 (2) ◽  
pp. 83-90
Author(s):  
Maxim Korshunov ◽  
Yuliya Togushova
Keyword(s):  
Experimental Data ◽  
Magnetic Susceptibility ◽  
Order Parameter ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Resonance Peak ◽  
Superconducting Order Parameter ◽  
Spin Resonance ◽  
Iron Based ◽  
The Impact

We have considered the impact of the nontrivial superconducting order parameter on the magnetic susceptibility within the multiorbital model for the iron-based materials. The formation of the spin-resonance peak is demonstrated and its connection to the experimental data on the inelastic neutron scattering is discussed.

s±-like spin resonance in the iron-based nodal superconductor BaFe2(As0.65P0.35)2observed using inelastic neutron scattering

2011 ◽  
Vol 84 (14) ◽  
Author(s):  
Motoyuki Ishikado ◽  
Yuki Nagai ◽  
Katsuaki Kodama ◽  
Ryoichi Kajimoto ◽  
Mitsutaka Nakamura ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Spin Resonance ◽  
Iron Based

INELASTIC NEUTRON SCATTERING FROM ANISOTROPIC SUPERCONDUCTORS

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3062-3065
Author(s):  
P. S. RISEBOROUGH
Keyword(s):  
Order Parameter ◽  
Inelastic Neutron Scattering ◽  
Particle Density ◽  
Coulomb Repulsion ◽  
Inelastic Neutron ◽  
Superconducting Order Parameter ◽  
Collective Excitations ◽  
Quasi Particle ◽  
Anisotropic Superconductors ◽  
Magnetic Fluctuation

The magnetic fluctuation spectra are calculated for various phases of anisotropic superconductors. Both singlet and triplet superconducting phases can support antiferromagnetic fluctuations for small values of the Coulomb repulsion, the spectra show power law frequency dependencies due to the nodes in the superconducting order parameter. For larger strengths of the Coulomb interaction, low energy critically damped collective excitations develop from the quasi-particle density of states in the gap. The q and ω dependence of the spectra can be used to deduce the character of the superconducting order parameter.

Spin Dynamics in the Metallic State of YBa2(Cu0.98 Zn0.02) 3O6+x

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3330-3334 ◽  
Author(s):  
Y. Sidis ◽  
P. Bourges ◽  
B. Hennion ◽  
R. Villeneuve ◽  
G. Collin ◽  
...  
Keyword(s):  
Inelastic Neutron Scattering ◽  
Spin Dynamics ◽  
Inelastic Neutron ◽  
Resonance Peak ◽  
Low Energy ◽  
Metallic State ◽  
Magnetic Fluctuations ◽  
Local Enhancement ◽  
Compound I ◽  
Nonmagnetic Impurities

Inelastic neutron scattering measurements have been carried out on a YBa2(Cu0.98-Zn0.02)3O 6+x single crystal in both underdoped (x = 0.7) and overdoped (x = 0.97) regimes. In the zinc substituted system, spin dynamics is drastically changed in respect to the pure compound: (i) the "resonance peak" almost vanishes, (ii) the spin gap is filled, (iii) new antiferromagnetic excitations are found at low energy. These new magnetic fluctuations, which persist in the normal state, account for a local enhancement of AF correlations around nonmagnetic impurities. Besides, it is worth emphasizing that features, not directly related to superconductivity, i.e., the contribution to the spin dynamics apart from the resonance peak and the "spin pseudo-gap" observed in the underdoped regime above T c , coexist with the new low energy magnetic fluctuations.

scholarly journals Effect of magnetic field on the spin resonance inFeTe0.5Se0.5as seen via inelastic neutron scattering

2010 ◽  
Vol 81 (10) ◽  
Author(s):  
Jinsheng Wen ◽  
Guangyong Xu ◽  
Zhijun Xu ◽  
Zhi Wei Lin ◽  
Qiang Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Spin Resonance
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