Magnetic Interactions, Superconductivity, and Spin-Resonance Peak in Iron-Based Materials

2019 ◽  
Vol 120 (13) ◽  
pp. 1313-1317
Author(s):  
Yu. N. Togushova ◽  
M. M. Korshunov
Keyword(s):  
Resonance Peak ◽  
Magnetic Interactions ◽  
Spin Resonance ◽  
Iron Based

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.

Spin Resonance

2018 ◽  
Author(s):  
M. M. Glazov
Keyword(s):  
Magnetic Resonance ◽  
Nuclear Spin ◽  
Electromagnetic Waves ◽  
Zeeman Splitting ◽  
Resonant Absorption ◽  
Magnetic Interactions ◽  
Spin Effects ◽  
Crystalline Environment ◽  
Spin Resonance ◽  
Optically Detected

This chapter is devoted to one of key phenomena in the field of spin physics, namely, resonant absorption of electromagnetic waves under conditions where the Zeeman splitting of spin levels in magnetic field is equal to photon energy. This method is particularly important for identification of nuclear spin effects, because resonance spectra provide fingerprints of different involved spin species and make it possible to distinguish different nuclear isotopes. As discussed in this chapter the nuclear magnetic resonance provides also an access to local magnetic fields acting on nuclear spins. These fields are caused by the magnetic interactions between the nuclei and by the quadrupole splittings of nuclear spin states in anisotropic crystalline environment. Manifestations of spin resonance in optical responses of semiconductors–that is, optically detected magnetic resonance–are discussed.

scholarly journals Neutron Spin Resonance in the 112-Type Iron-Based Superconductor

2018 ◽  
Vol 120 (13) ◽  
Author(s):  
Tao Xie ◽  
Dongliang Gong ◽  
Haranath Ghosh ◽  
Abyay Ghosh ◽  
Minoru Soda ◽  
...  
Keyword(s):  
Neutron Spin ◽  
Spin Resonance ◽  
Iron Based

scholarly journals Role of Interactions in the Energy of the Spin Resonance Peak in Fe-Based Superconductors

2019 ◽  
Vol 289 ◽  
pp. 212-217 ◽  
Author(s):  
Yuliya N. Togushova ◽  
Maxim Korshunov
Keyword(s):  
Resonance Energy ◽  
Energy Scale ◽  
Resonance Peak ◽  
Characteristic Energy ◽  
Iron Based Superconductors ◽  
Hubbard Interaction ◽  
First Case ◽  
Spin Resonance ◽  
Spin Response

We consider the spin response within the five-orbital model for iron-based superconductors and study two cases: equal and unequal gaps in different bands. In the first case, the spin resonance peak in the superconducting state appears below the characteristic energy scale determined by the gap magnitude, 2ΔL. In the second case, the energy scale corresponds to the sum of smaller and larger gap magnitudes, ΔL+ΔS. Increasing the values of the Hubbard interaction and the Hund's exchange, we observe a shift of the spin resonance energy to lower frequencies.

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