The role of phonon-modulated transfer integrals in the electrical and magnetic properties of an extended Hubbard model

1975 ◽  
Vol 11 (4) ◽  
pp. 1352-1358 ◽  
Author(s):  
Mustansir Barma ◽  
Robert A. Bari
Keyword(s):  
Magnetic Properties ◽  
Hubbard Model ◽  
Extended Hubbard Model ◽  
Electrical And Magnetic Properties ◽  
Transfer Integrals

Role of Fe Doping on Local Structure and Electrical and Magnetic Properties of PbTiO3

2021 ◽  
Author(s):  
Hasitha Ganegoda ◽  
Soham Mukherjee ◽  
Beihai Ma ◽  
Daniel T. Olive ◽  
James H. McNeely ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Local Structure ◽  
Fe Doping ◽  
Electrical And Magnetic Properties

Magnetite thin films grown on different flexible polymer substrates at room temperature: Role of antiphase boundaries in electrical and magnetic properties

2020 ◽  
Vol 846 ◽  
pp. 156368
Author(s):  
Mohammad Shahnawaze Ansari ◽  
Mohd Hafiz Dzarfan Othman ◽  
Mohammad Omaish Ansari ◽  
Sana Ansari ◽  
Huda Abdullah ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Room Temperature ◽  
Antiphase Boundaries ◽  
Polymer Substrates ◽  
Electrical And Magnetic Properties ◽  
Flexible Polymer

Role of charge doping and distortions on the structural, electrical, and magnetic properties of modified CuFeO2 compounds

2020 ◽  
Vol 127 (17) ◽  
pp. 175704
Author(s):  
Nishant Barot ◽  
Prashant K. Mehta ◽  
Ashok Rao ◽  
Riya Thomas ◽  
Yung-Kang Kuo ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Electrical And Magnetic Properties ◽  
Charge Doping

Local magnetic properties of $$L\times L$$ L × L square lattice with an Extended Hubbard Model

2014 ◽  
Vol 47 (3) ◽  
pp. 523-528 ◽  
Author(s):  
A. Zouhair ◽  
S. Harir ◽  
M. Bennai ◽  
A. Migalska-Zalas ◽  
Y. Boughaleb
Keyword(s):  
Magnetic Properties ◽  
Hubbard Model ◽  
Square Lattice ◽  
Extended Hubbard Model

Role of Annealing Temperatures on Mechanical, Optical, Electrical and Magnetic Properties of Nanohydroxyapatite Biomaterial

2019 ◽  
Vol 19 (8) ◽  
pp. 4366-4376 ◽  
Author(s):  
R Panneerselvam ◽  
N Anandhan ◽  
G Sivakumar ◽  
K. P Ganesan ◽  
T Marimuthu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Annealing Temperatures ◽  
Electrical And Magnetic Properties

THERMODYNAMICS OF THE FERMI-LINEARIZED EXTENDED HUBBARD MODEL

1992 ◽  
Vol 06 (22) ◽  
pp. 3529-3541 ◽  
Author(s):  
ANDREA DANANI ◽  
ARIANNA MONTORSI ◽  
MARIO RASETTI
Keyword(s):  
Hubbard Model ◽  
Coulomb Interaction ◽  
Mean Field ◽  
Local Magnetic Moment ◽  
The Novel ◽  
Extended Hubbard Model ◽  
Site Cluster ◽  
The Mean ◽  
Two Phases

The fermi linearization scheme for a two-site cluster (dimer) is applied to the extended Hubbard model, including Coulomb interaction between nearest neighbour sites. The partition function and the order parameter, as well as the average double-occupation and local magnetic moment are evaluated. The theory is checked by extended numerical analysis, performed here in the homogeneous case, when pairing is zero, and deriving the explicit temperature and filling dependence of the above quantities. An interesting feature that emerges from such calculations is that the mean-field parameter characteristic of fermi-linearization is capable of describing two different phases, one of which is not present in the conventional Hubbard model. The order parameters corresponding to the two phases are explicitly derived. The novel phase can be ascribed to the n.n. Coulomb interaction, the role of whose strength V is analysed.

Chemical and Physical Properties of Soluble Part of Emeraldine: Comparison with Insoluble Emeraldine

1989 ◽  
Vol 173 ◽  
Author(s):  
R. Laversanne ◽  
P. Vaca
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Conduction Mechanism ◽  
Emeraldine Salt ◽  
Electrical And Magnetic Properties ◽  
Physical Study ◽  
Low Weight ◽  
The One ◽  
Soluble Part

ABSTRACTA preliminary physical study of the soluble part of emeraldine is presented. The electrical and magnetic properties of this low weight material are very similar of those of the pristine emeraldine salt. These results emphazise the possible role of short chain species in the conduction mechanism of polyaniline. In order to clarify this point, previous magnetic investigations on insoluble emeraldine salts are revisited. It appears that the fit of the magnetic susceptibility temperature dependence of polyaniline with a Curie law plus a Pauli term might not be justified at low temperature. A T−α law with a ≈ 0.75 gives a better fit suggesting a behavior similar to the one found in Random Exchange Heisenberg Antiferromagnetic Chain (REHAC)

Density-, temperature-, and concentration-induced metal–nonmetal transitions in fluids

1977 ◽  
Vol 55 (11) ◽  
pp. 2225-2239 ◽  
Author(s):  
F. Hensel
Keyword(s):  
Magnetic Properties ◽  
Structure Factor ◽  
Electrical And Magnetic Properties ◽  
Microscopic Inhomogeneity ◽  
Fluid Systems ◽  
Semiconducting Alloys ◽  
Nonmetal Transition ◽  
Continuous Metal ◽  
Experimental Survey

A brief review is given of the continuous metal–nonmetal transition observed in different fluid systems, with special emphasis on recent work by the author and his colleagues. Selected results of abroad experimental survey of the electrical and magnetic properties of fluid binary semiconducting alloys, expanded fluid metals, and fluid selenium are reported. The results are discussed with special emphasis on their relationship to some theoretical areas of controversy, especially the importance of the amount of covalency and ionicity for the electrical and magnetic properties of semiconducting alloys, the role of chemical bond satisfaction in covalent selenium and tellurium for the temperature-induced nonmetal to metal transition, and some speculations concerning the importance of fluctuations and microscopic inhomogeneity for the metal–nonmetal transition in expanded fluid metals. It is concluded that no theory of the metal–nonmetal transition is available which is generally valid for all the fluid systems discussed. It is proposed that measurements of the structure factor and of thermodynamic data of the fluids are necessary to make it possible to formulate a theory which is tested experimentally. The first new results of the structure factor and the compressibility of fluid expanded rubidium are reported.

The role of praseodymium substituted ions on electrical and magnetic properties of Mg spinel ferrites

2017 ◽  
Vol 428 ◽  
pp. 136-143 ◽  
Author(s):  
Muhammad Tahir Farid ◽  
Ishtiaq Ahmad ◽  
Muddassara Kanwal ◽  
Ghulam Murtaza ◽  
Irshad Ali ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Spinel Ferrites ◽  
Electrical And Magnetic Properties
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