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Title
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Molecular collapse in monolayer graphene
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Author
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Abstract
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| Atomic collapse is a phenomenon inherent to relativistic quantum mechanics where electron states dive in the positron continuum for highly charged nuclei. This phenomenon was recently observed in graphene. Here we investigate a novel collapse phenomenon when multiple sub- and supercritical charges of equal strength are put close together as in a molecule. We construct a phase diagram which consists of three distinct regions: (1) subcritical, (2) frustrated atomic collapse, and (3) molecular collapse. We show that the single impurity atomic collapse resonances rearrange themselves to form molecular collapse resonances which exhibit a distinct bonding, anti-bonding and non-bonding character. Here we limit ourselves to systems consisting of two and three charges. We show that by tuning the distance between the charges and their strength a high degree of control over the molecular collapse resonances can be achieved. |
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Language
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English
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Source (journal)
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2D materials. - Bristol, 2014, currens
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Publication
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Bristol
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IOP Publishing
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2019
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ISSN
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2053-1583
[online]
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DOI
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10.1088/2053-1583/AB3FEB
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Volume/pages
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6
:4
(2019)
, 13 p.
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Article Reference
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045047
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ISI
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000487692200003
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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