Tight-binding model for electronic structure and electron-phonon coupling in high Tc superconductors (La2−xMxCuO4)

A tight-binding model is formulated for the calculation of the electronic structure of a double strand of deoxyribonucleic acid (DNA). The theory is applied to DNA with a particular structure such as the ladder and decorated ladder structures. It is found that there is a novel type of metal–insulator transitions due to the hopping anisotropy of the system. A metal-semimetal-semiconductor transition is found in the former and an effective semiconductor-metal transition at finite temperature in the latter, as the effect of base paring between two strands of DNA is increased. The latter mechanism may be responsible for explaining the Meade and Kayyem's recent observation.

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Some Polytypes of Germanium and a Tight Binding Model for the Electronic Structure of Amorphous Solids

Computational Methods for Large Molecules and Localized States in Solids ◽

10.1007/978-1-4684-2013-5_27 ◽

1973 ◽

pp. 317-325

Author(s):

Douglas Henderson ◽

Irene B. Ortenburger

Keyword(s):

Electronic Structure ◽

Tight Binding ◽

Amorphous Solids ◽

Tight Binding Model ◽

Binding Model

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The electronic structure of disordered systems. I. The density of states of the Anderson tight binding model

Journal of Physics C Solid State Physics ◽

10.1088/0022-3719/4/13/026 ◽

1971 ◽

Vol 4 (13) ◽

pp. 1747-1756 ◽

Cited By ~ 5

Author(s):

M A Ball

Keyword(s):

Electronic Structure ◽

Density Of States ◽

Disordered Systems ◽

Tight Binding ◽

Tight Binding Model ◽

Binding Model

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THEORETICAL ASPECTS OF THE FIELD INDUCED SUPERCONDUCTIVITY IN POLYACENES AND C60

International Journal of Modern Physics B ◽

10.1142/s0217979202011299 ◽

2002 ◽

Vol 16 (11n12) ◽

pp. 1547-1551

Author(s):

S.-L. DRECHSLER ◽

G. PAASCH ◽

J. MÁLEK ◽

S. V. SHULGA ◽

H. ESCHRIG ◽

...

Keyword(s):

Tight Binding ◽

Band Structure Calculation ◽

Full Potential ◽

Coupling Constant ◽

Phonon Coupling ◽

Critical Temperatures ◽

Binding Model ◽

Electron Phonon Coupling ◽

Strong Coulomb ◽

Experimental Values

The electronic structure and the superconductivity in field-doped polyacenes are considered. Within a modified Thomas–Fermi approach for typical experimental values of the surface charge density the injected charge is confined to a monolayer. The electron–phonon coupling constant for internal modes λintra is estimated using the work of Devos and Lanoo (Ref. 4) and the density of states N(0) estimated from a 2D tight-binding model derived from a full potential LDA band structure calculation for bulk anthracene. The empirical values of the Coulomb pseudopotentials are significantly enhanced. The strong Coulomb interaction is considered as a key quantity which determines the large differences in the critical temperatures achieved for n-doped polyacenes and C 60.

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