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Engineering bands of extended electronic states in a class of topologically disordered and quasiperiodic lattices.

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Title: Engineering bands of extended electronic states in a class of topologically disordered and quasiperiodic lattices.
Authors: Pal, Biplab1 biplabpal@klyuniv.ac.in, Chakrabarti, Arunava1 arunava_chakrabarti@yahoo.co.in
Source: Physics Letters A. Jul2014, Vol. 378 Issue 37, p2782-2789. 8p.
Subjects: Energy bands, Lattice theory, Eigenfunctions, Delocalization energy, Ballistic conduction, Single electron devices
Abstract: We show that a discrete tight-binding model representing either a random or a quasiperiodic array of bonds can have the entire energy spectrum or a substantial part of it absolutely continuous, populated by extended eigenfunctions only, when atomic sites are coupled to the lattice locally, or non-locally from one side. The event can be fine-tuned by controlling only the host–adatom coupling in one case, while in two other cases cited here an additional external magnetic field is necessary. The delocalization of electronic states for the group of systems presented here is sensitive to a subtle correlation between the numerical values of the Hamiltonian parameters – a fact that is not common in the conventional cases of Anderson localization. Our results are analytically exact, and supported by numerical evaluation of the density of states and electronic transmission coefficient. [ABSTRACT FROM AUTHOR]
Copyright of Physics Letters A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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PubType: Academic Journal
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  Data: Engineering bands of extended electronic states in a class of topologically disordered and quasiperiodic lattices.
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  Data: <searchLink fieldCode="JN" term="%22Physics+Letters+A%22">Physics Letters A</searchLink>. Jul2014, Vol. 378 Issue 37, p2782-2789. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Energy+bands%22">Energy bands</searchLink><br /><searchLink fieldCode="DE" term="%22Lattice+theory%22">Lattice theory</searchLink><br /><searchLink fieldCode="DE" term="%22Eigenfunctions%22">Eigenfunctions</searchLink><br /><searchLink fieldCode="DE" term="%22Delocalization+energy%22">Delocalization energy</searchLink><br /><searchLink fieldCode="DE" term="%22Ballistic+conduction%22">Ballistic conduction</searchLink><br /><searchLink fieldCode="DE" term="%22Single+electron+devices%22">Single electron devices</searchLink>
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  Data: We show that a discrete tight-binding model representing either a random or a quasiperiodic array of bonds can have the entire energy spectrum or a substantial part of it absolutely continuous, populated by extended eigenfunctions only, when atomic sites are coupled to the lattice locally, or non-locally from one side. The event can be fine-tuned by controlling only the host–adatom coupling in one case, while in two other cases cited here an additional external magnetic field is necessary. The delocalization of electronic states for the group of systems presented here is sensitive to a subtle correlation between the numerical values of the Hamiltonian parameters – a fact that is not common in the conventional cases of Anderson localization. Our results are analytically exact, and supported by numerical evaluation of the density of states and electronic transmission coefficient. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Physics Letters A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.physleta.2014.07.034
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 2782
    Subjects:
      – SubjectFull: Energy bands
        Type: general
      – SubjectFull: Lattice theory
        Type: general
      – SubjectFull: Eigenfunctions
        Type: general
      – SubjectFull: Delocalization energy
        Type: general
      – SubjectFull: Ballistic conduction
        Type: general
      – SubjectFull: Single electron devices
        Type: general
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      – TitleFull: Engineering bands of extended electronic states in a class of topologically disordered and quasiperiodic lattices.
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              Text: Jul2014
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              Y: 2014
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