Basanta Kumar Sahoo | Utkal University,Bhubaneswar,India (original) (raw)

Papers by Basanta Kumar Sahoo

Micro and Nanosystems, 2020

Background: Mg2TiO4 – based ceramics have proven their potentiality in the field of wireless comm... more Background: Mg2TiO4 – based ceramics have proven their potentiality in the field of wireless communication systems. In the past, Mg2TiO4 ceramics was considered a quite optical response material in thin film form. Moreover, there is very few studies have been done whatever the proposed work in the present study. Objective: To prepare Mg2TiO4 nano-powders with the help of High Energy Ball Mill (HEBM) and intend to investigate its effect on crystal structure, microstructure and on thermodynamic behavior of MgO-TiO2 system. Methods: Mg2TiO4 ceramics were synthesized using Mechanical alloying method from high- purity oxides MgO and TiO2 (99.99%) of Sigma Aldrich (St. Louis, MO). Results: From the experimental studies it is observed that the powder’s particle size decreases with an increase of milling time. XRD analysis is carried out for phase confirmation of the mixed Mg2TiO4 powder. Further, the result also showed that there is structural changes occurred in the sample by high energy ...

Indian Journal of Physics, 2009

American Journal of Physics and Applications, 2021

We formulate a Model Hamiltonian of two band superconductivity for Magnesium Diboride superconduc... more We formulate a Model Hamiltonian of two band superconductivity for Magnesium Diboride superconductors (MgB2). It is a conventional BCS type metallic superconductor which has the highest critical temperature Tc=39K. It is assumed that the superconductivity in MgB2 arises due to metallic nature of the 2D sheets. From band structure calculations, it is observed that two types of bands i.e. σ and π bands are located at Fermi surface. Here, we consider phonon mediated superconductivity in which σ band is dominant over π band i.e. σ band is more coupled to a superconductor with much higher coupling. We consider a model Hamiltonian with mean field approach and solve this by calculating equations of motion of Green functions for a single particle. We determine the quasi-particle energy from the poles of the Green functions. We derive the single particle correlation functions and determine the two SC order parameters for both σ and π band. Here, the two SC order parameters for the bands are ...

American Journal of Physics and Applications, 2021

We formulate a Model Hamiltonian of two band superconductivity for Magnesium Diboride superconduc... more We formulate a Model Hamiltonian of two band superconductivity for Magnesium Diboride superconductors (MgB2). It is a conventional BCS type metallic superconductor which has the highest critical temperature Tc=39K. It is assumed that the superconductivity in MgB2 arises due to metallic nature of the 2D sheets. From band structure calculations, it is observed that two types of bands i.e. σ and π bands are located at Fermi surface. Here, we consider phonon mediated superconductivity in which σ band is dominant over π band i.e. σ band is more coupled to a superconductor with much higher coupling. We consider a model Hamiltonian with mean field approach and solve this by calculating equations of motion of Green functions for a single particle. We determine the quasi-particle energy from the poles of the Green functions. We derive the single particle correlation functions and determine the two SC order parameters for both σ and π band. Here, the two SC order parameters for the bands are ...

Journal of Materials Science: Materials in Electronics

Indian Journal of Physics, 2009

The interplay between superconductivity (SC) and antiferromagnetism (AFM) is studied in strongly ... more The interplay between superconductivity (SC) and antiferromagnetism (AFM) is studied in strongly correlated systems of high T c Cuprate superconductors. It is assumed that superconductivity arises due to the BCS pairing mechanism in presence of AFM in Cu lattices of Cu-O planes. The total Hamiltonian of the system is mean-field one and has been solved exactly by writing the equations of motion for the single-particle Green's functions. Equations for the appropriate single-particle co-relation functions are derived and the order parameters corresponding to SC and AFM are determined. It is assumed that the Fermi energy ∈ F = 0 and the renormalized localized f energy level coincide with the Fermi level. All the quantities in the final equation for h and ∆ are made dimensionless by dividing by 2t, where t is the hopping integral. The temperature-dependent values of staggered magnetic field (h) and SC gap (∆) were determined by solving self-consistent equations for h and ∆. The quasi-particle energy bands are function of AFM gap (h), SC gap (∆) and hybridization (V). Then the dispersion of quasi-particles is studied at different temperatures by considering temperature-dependent values of h and ∆ varying other different model parameters.

Micro and Nanosystems, 2020

Background: Mg2TiO4 – based ceramics have proven their potentiality in the field of wireless comm... more Background: Mg2TiO4 – based ceramics have proven their potentiality in the field of wireless communication systems. In the past, Mg2TiO4 ceramics was considered a quite optical response material in thin film form. Moreover, there is very few studies have been done whatever the proposed work in the present study. Objective: To prepare Mg2TiO4 nano-powders with the help of High Energy Ball Mill (HEBM) and intend to investigate its effect on crystal structure, microstructure and on thermodynamic behavior of MgO-TiO2 system. Methods: Mg2TiO4 ceramics were synthesized using Mechanical alloying method from high- purity oxides MgO and TiO2 (99.99%) of Sigma Aldrich (St. Louis, MO). Results: From the experimental studies it is observed that the powder’s particle size decreases with an increase of milling time. XRD analysis is carried out for phase confirmation of the mixed Mg2TiO4 powder. Further, the result also showed that there is structural changes occurred in the sample by high energy ...

Indian Journal of Physics, 2009

American Journal of Physics and Applications, 2021

We formulate a Model Hamiltonian of two band superconductivity for Magnesium Diboride superconduc... more We formulate a Model Hamiltonian of two band superconductivity for Magnesium Diboride superconductors (MgB2). It is a conventional BCS type metallic superconductor which has the highest critical temperature Tc=39K. It is assumed that the superconductivity in MgB2 arises due to metallic nature of the 2D sheets. From band structure calculations, it is observed that two types of bands i.e. σ and π bands are located at Fermi surface. Here, we consider phonon mediated superconductivity in which σ band is dominant over π band i.e. σ band is more coupled to a superconductor with much higher coupling. We consider a model Hamiltonian with mean field approach and solve this by calculating equations of motion of Green functions for a single particle. We determine the quasi-particle energy from the poles of the Green functions. We derive the single particle correlation functions and determine the two SC order parameters for both σ and π band. Here, the two SC order parameters for the bands are ...

American Journal of Physics and Applications, 2021

We formulate a Model Hamiltonian of two band superconductivity for Magnesium Diboride superconduc... more We formulate a Model Hamiltonian of two band superconductivity for Magnesium Diboride superconductors (MgB2). It is a conventional BCS type metallic superconductor which has the highest critical temperature Tc=39K. It is assumed that the superconductivity in MgB2 arises due to metallic nature of the 2D sheets. From band structure calculations, it is observed that two types of bands i.e. σ and π bands are located at Fermi surface. Here, we consider phonon mediated superconductivity in which σ band is dominant over π band i.e. σ band is more coupled to a superconductor with much higher coupling. We consider a model Hamiltonian with mean field approach and solve this by calculating equations of motion of Green functions for a single particle. We determine the quasi-particle energy from the poles of the Green functions. We derive the single particle correlation functions and determine the two SC order parameters for both σ and π band. Here, the two SC order parameters for the bands are ...

Journal of Materials Science: Materials in Electronics

Indian Journal of Physics, 2009

The interplay between superconductivity (SC) and antiferromagnetism (AFM) is studied in strongly ... more The interplay between superconductivity (SC) and antiferromagnetism (AFM) is studied in strongly correlated systems of high T c Cuprate superconductors. It is assumed that superconductivity arises due to the BCS pairing mechanism in presence of AFM in Cu lattices of Cu-O planes. The total Hamiltonian of the system is mean-field one and has been solved exactly by writing the equations of motion for the single-particle Green's functions. Equations for the appropriate single-particle co-relation functions are derived and the order parameters corresponding to SC and AFM are determined. It is assumed that the Fermi energy ∈ F = 0 and the renormalized localized f energy level coincide with the Fermi level. All the quantities in the final equation for h and ∆ are made dimensionless by dividing by 2t, where t is the hopping integral. The temperature-dependent values of staggered magnetic field (h) and SC gap (∆) were determined by solving self-consistent equations for h and ∆. The quasi-particle energy bands are function of AFM gap (h), SC gap (∆) and hybridization (V). Then the dispersion of quasi-particles is studied at different temperatures by considering temperature-dependent values of h and ∆ varying other different model parameters.