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M. M. Bagheri-Mohagheghi

Publications and source records attributed to M. M. Bagheri-Mohagheghi.

3 recordsLinked to original sources

Ultra-Hot plasma of magnetic monopoles as fifth phase of matter: Bonding dissociation conditions of N-S magnetic in a hot plasma medium and superlattices of solids

A magnetic atom has two magnetic poles of N and S, and in normal conditions, separation of magnetic poles cannot be happened, even in very small atomic dimensions. Existence of magnetic dipoles is due to a fundamental property of magnetic materials and belongs to intrinsic spin of electrons. For the electron, N and S magnetic poles are considered, similar to a current loop. The aim of this paper is theoretical calculate dissociation energy of N-S poles a quantum magnetic particle with two approaches of classical and quantum mechanics by providing a harmonic oscillator simple model to estimate dissociation energy of the N-S poles and corresponding breakdown temperature and internal pressure. The results showed that separation of magnetic poles occurs in two states: (a) in an ultra-hot plasma medium with extremely high temperatures, such as in the center of a hot star, and (b) at extremely high pressures, such as between internal plates in complex superlattices of layered solids. It will be shown that breakdown temperature is in order of θ =107 to 108 Kelvin. This temperature is very high and it only happens in an ultra-hot plasma environment as fifth phase of matter. In addition, based on this model, we calculated that the possibility of dissociation of bonds between N and S magnetic poles for solid superlattices occurs at very high pressures between crystal plates. According to these results, the presence of isolated magnetic monopole in superlattices of solids under ultra-high-pressure conditions is possible. Therefore, this model suggests that the conductivity of magnetic monopole carries can be used in the manipulation of nanomaterials for applications in the production of advanced devices such as new generation of superconductors, new spin devices and magnetic-electronics advanced materials with magnetic monopoles and super-dielectrics.

cond-mat.str-el↗

Effect of electromagnetic permeability on transition temperature of superconductivity

The description of superconductivity at high temperature is a problem that has recently been addressed. Transition temperature of superconductivity, $T_c$, depends on the lattice structure type, size, and room pressure. In super-lattices and low dimensional layered nanostructures, $T_c$ is increased, by increasing the complexity of the structure and internal pressures in solid lattice. In this paper, we investigate the relation between physical parameters ($ε, μ$) of matter and superconductivity properties as well as transition temperature ($T_c$), and explain the superconductivity at high temperature. In this study, a semi-classical electromagnetic description along with vortex topologic theory and quantum dynamic models with experimental data considered to justify the relation between superconductivity phenomena and magnetic monopole properties. We find that the electromagnetic energy of magnetic monopole is in agreement with vortex energy in topological theory and it can get close to thermal energy at high temperature. These models suggest the superconductivity is related to the mobile monopole or vortices. we show that the electrical permittivity ($ε$) and magnetic permeability ($μ$) of matter have a key role in the superconductive properties.

cond-mat.supr-con↗

Holographic superconductor in a deformed four-dimensional STU model

In this paper, we consider deformed STU model in four dimensions including both electric and magnetic charges. Using AdS/CFT correspondence, we study holographic superconductor and obtain transport properties like electrical and thermal conductivities. We obtain transport properties in terms of the black hole magnetic charge and interpret it as magnetic monopole of dual field theory. We find that presence of magnetic charge is necessary to have maximum conductivities, and existence of magnetic monopole with a critical charge (137 e) to reach the maximum superconductivity is important. Also, we show that thermal conductivity increases with increasing of magnetic charge. It may be concluded that the origin of superconductivity is magnetic monopole.

hep-th↗