On BCS theory of superconductivity in systems with overlapping bands I. Simple overlap

Asomba, George C.

doi:10.1016/0921-4534(95)00052-6

Cited by 7 publications

(5 citation statements)

References 50 publications

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“…7(b). [64][65][66][67][68][69][70][71] So these phenomena will promote the transfer of photogenerated charges. It is inferred that a smaller difference in the conduction band edges and a larger overlapping of the wave functions will facilitate the photogenerated charges migration and separation, which will induce a higher efficiency of photovoltaic conversion.…”

Section: Surface Photovoltage Spectramentioning

confidence: 99%

Effect of energy level matching on the enhancement of photovoltaic response about oxide/Zn2SnO4 composites

Zheng

Zhang

et al. 2011

J. Mater. Chem.

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Section: Surface Photovoltage Spectramentioning

confidence: 99%

Effect of energy level matching on the enhancement of photovoltaic response about oxide/Zn2SnO4 composites

Zheng

Zhang

et al. 2011

J. Mater. Chem.

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“…[2,3] This theoretical framework provides us an physical understanding of the superconductivity mechanism of CNs even though the result relies on the F 0 (0) solution selected based on the hints of the experiment result [2,3] and the multi-band BCS theory. [9] Experimentally, the transport measurement of the ropes of SWCNs indicates the superconducting state occuring in the temperature range of 0.1 ∼ 1K. [2] The investigation of the magnetic properties for the small radius SWCN (4Å) reveals that the T c can be estimated to be lower than 15K.…”

Section: Multi-wall Carbon Nanotubesmentioning

confidence: 99%

“…Based on the hints of the experimental results [2,3] and the similar two-band BCS theory, [9] we may select the smallest solution of F 0 (0),…”

Section: Double-wall Carbon Nanotubesmentioning

confidence: 99%

“…We consider a general BCS Hamiltonian of MWCN constructed from a coupling multi-layer BCS Hamiltonian. [9] The single electron hopping between layers is estimated to be much weaker than the Cooper pair hopping between layers due to the mismatching of atoms between layers. [7,2] The Cooper pair hopping between layers dominates the interaction between layers.…”

Section: Bcs Hamiltonianmentioning

confidence: 99%

“…Making use of the Bogoliubov transform Eq. (9) and considering the tight-binding approximation, the superconductng energy gap ∆ ℓ satisfies a set of equations, which matrix form may be written as [9] …”

Section: Bcs Hamiltonianmentioning

confidence: 99%

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Bardeen–Cooper–Schrieffer formalism of superconductivity in carbon nanotubes

Liang¹

2008

Physica B: Condensed Matter

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We develop the Bardeen-Cooper-Schrieffer (BCS) formalism for the superconductivity of carbon nanotubes. It is found that the superconducting transition temperature T c of single-wall carbon nanotubes decreases exponentially with the increase of the tube diameter because the density of states near the Fermi energy is inverse proportional to the tube diameter. For the multi-wall carbon nanotubes, the Cooper paring hopping between layers enhances the superconducting correlation and increase the superconducting transition temperature, which is consistent with the experimental observation.

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Feshbach Shape Resonances in Multiband High Tc Superconductors

Bianconi

Filippi

Symmetry and Heterogeneity in High Temperature Superconductors

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Abstract:We describe particular nanoarchitectures (superlattices of superconducting wires and layers) where a mechanism to evade temperature decoherence effects in a quantum condensate is switched on by tuning the charge density. The superlattice structure determines the subbands and the corresponding Bloch wavefunctions of charge carriers at the Fermi level with different parity and different spatial locations. The disparity and negligible overlap between electron wave-functions in different subbands suppress the single electron interband impurity scattering rate and allow the multiband superconductivity in the clean limit. The quantum trick that bestows to the system the property to resist to the decoherence attacks of high temperature is the Feshbach shape resonance in the interband off-diagonal exchange-like pairing term i.e., in the quantum configuration interaction between pairing channels in different subbands. It occurs by tuning the chemical potential at a particular point near a Van Hove singularity (vHs) in the electronic energy spectrum, or a Lifshitz electronic topological transition (ETT), associated with the change of the dimensionality of the Fermi surface topology of one of the subbands.

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On BCS theory of superconductivity in systems with overlapping bands I. Simple overlap

Cited by 7 publications

References 50 publications

Effect of energy level matching on the enhancement of photovoltaic response about oxide/Zn2SnO4 composites

Effect of energy level matching on the enhancement of photovoltaic response about oxide/Zn2SnO4 composites

Bardeen–Cooper–Schrieffer formalism of superconductivity in carbon nanotubes

Feshbach Shape Resonances in Multiband High Tc Superconductors

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