Temperature Dependence of Commensurate Magnetic Resonance in Cuprate Superconductors

2018 ◽  
Vol 787 ◽  
pp. 31-36
Author(s):  
Yu Lan ◽  
Lü Lin Kuang
Keyword(s):  
Magnetic Resonance ◽  
Temperature Dependence ◽  
Cuprate Superconductors ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Resonance Peak ◽  
Superconducting Gap ◽  
Superconducting Transition ◽  
Increasing Temperature ◽  
Gap Parameter

Within the kinetic energy driven superconducting mechanism, we have studied the temperature dependence of commensurate magnetic resonance in cuprate superconductors. It is shown that the commensurate magnetic resonance peak at the antiferromagnetic wave vector point persists in the superconducting state until the temperature rises to the superconducting transition temperature $T_{\rm c}$. The intensity of the resonance peak decreases with increasing temperature which is just like the temperature dependence of the superconducting gap parameter. Our results are in qualitative agreement with the inelastic neutron scattering experimental data and reflect that the commensurate magnetic resonance is closely related to the creation of the charge carrier pairs and thus the superconducting mechanism of cuprate superconductors.

A universal scaling behavior in magnetic resonance peak in high temperature superconductivity

2015 ◽  
Vol 29 (25n26) ◽  
pp. 1542003 ◽  
Author(s):  
Seung Joon Shin ◽  
Sung-Ho Suck Salk
Keyword(s):  
High Temperature ◽  
Magnetic Resonance ◽  
High Temperature Superconductivity ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Resonance Peak ◽  
Scaling Behavior ◽  
Linear Scaling ◽  
Superconducting Transition ◽  
Energy Formula

Eminent inelastic neutron scattering (INS) measurements of high temperature cuprates currently lacking theoretical interpretations are the observed temperature dependence of magnetic resonance peak and linear scaling relation between the resonance peak energy, [Formula: see text] and the superconducting transition temperature, [Formula: see text]. Using our slave-boson approach of the [Formula: see text]–[Formula: see text] Hamiltonian (Phys. Rev. 64, 052501 (2001)) for this study, we show that starting from the pseudogap temperature [Formula: see text], the magnetic resonance peak increases with decreasing temperature, revealing its inflection point at [Formula: see text] and that spin pairing correlations are responsible for [Formula: see text]-wave superconductivity. We find that there exists a universal linear scaling behavior of [Formula: see text], irrespective of the Heisenberg exchange coupling.

scholarly journals INTERPLAY BETWEEN SINGLE PARTICLE COHERENCE AND KINETIC ENERGY DRIVEN SUPERCONDUCTIVITY IN DOPED CUPRATES

2004 ◽  
Vol 18 (17) ◽  
pp. 895-907 ◽  
Author(s):  
TIANXING MA ◽  
HUAIMING GUO ◽  
SHIPING FENG
Keyword(s):  
Transition Temperature ◽  
Kinetic Energy ◽  
Single Particle ◽  
Superconducting Transition Temperature ◽  
Spin Structure ◽  
Cuprate Superconductors ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Superconducting Transition ◽  
Dynamical Spin

Within the kinetic energy driven superconducting mechanism, the interplay between the single particle coherence and superconducting instability in doped cuprates is studied. The superconducting transition temperature increases with increasing doping in the underdoped regime, and reaches a maximum in the optimal doping, then decreases in the overdoped regime, however, the values of this superconducting transition temperature in the whole superconducting range are suppressed to low temperature due to the single particle coherence. Within this superconducting mechanism, we calculate the dynamical spin structure factor of cuprate superconductors, and reproduce all main features of inelastic neutron scattering experiments in the superconducting-state.

A POSSIBLE FIRST PRINCIPLE ARGUMENTS ON THE SYMMETRY OF SUPERCONDUTING GAP PARAMETER

1999 ◽  
Vol 13 (29n31) ◽  
pp. 3440-3442 ◽  
Author(s):  
CHANGDE GONG
Keyword(s):  
Experimental Data ◽  
Theoretical Prediction ◽  
Cuprate Superconductors ◽  
Superconducting Gap ◽  
First Principle ◽  
General Physical ◽  
Gap Parameter

The symmetry of superconducting gap parameter in high-Tc cuprate superconductors has been studied based on general physical considerations. The disagreement between theoretical prediction and experimental data is discussed.

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.

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.

Dynamics of CrystallineN-Methylacetamide:  Temperature Dependence of Infrared and Inelastic Neutron Scattering Spectra

1998 ◽  
Vol 102 (32) ◽  
pp. 6177-6183 ◽  
Author(s):  
Mariette Barthes ◽  
Heloisa N. Bordallo ◽  
Juergen Eckert ◽  
Olivier Maurus ◽  
Giorgio de Nunzio ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Temperature Dependence ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Scattering Spectra

scholarly journals Uniform excitations in magnetic nanoparticles

2010 ◽  
Vol 1 ◽  
pp. 48-54 ◽  
Author(s):  
Steen Mørup ◽  
Cathrine Frandsen ◽  
Mikkel Fougt Hansen
Keyword(s):  
Magnetic Nanoparticles ◽  
Temperature Dependence ◽  
Inelastic Neutron Scattering ◽  
Magnetic Hyperfine Field ◽  
Short Review ◽  
Inelastic Neutron ◽  
Blocking Temperature ◽  
Linear Temperature Dependence ◽  
Linear Temperature ◽  
Average Magnetization

We present a short review of the magnetic excitations in nanoparticles below the superparamagnetic blocking temperature. In this temperature regime, the magnetic dynamics in nanoparticles is dominated by uniform excitations, and this leads to a linear temperature dependence of the magnetization and the magnetic hyperfine field, in contrast to the Bloch T 3/2 law in bulk materials. The temperature dependence of the average magnetization is conveniently studied by Mössbauer spectroscopy. The energy of the uniform excitations of magnetic nanoparticles can be studied by inelastic neutron scattering.

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