Configuration entropy for N-Dirac fermions with dissipation and external field: An effective-mass phase transition

Dirac fermions in solid state are defined through a homogeneous dispersion relation of degree one. Consequently, the group velocity, having a superior bound, becomes invariant under spatial scaling. This fact allows considering the dynamics of a family or set of Dirac fermions at different spatial d...

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Bibliographic Details
Published in:Europhysics letters 2022-05, Vol.138 (3), p.36004
Main Author: Flores, J. C.
Format: Article
Language:English
Subjects:
Configurations
Critical angle
Critical field (superconductivity)
Degeneration
Dissipation
Entropy
Fermions
Graphene
Group velocity
Phase transitions
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Summary:Dirac fermions in solid state are defined through a homogeneous dispersion relation of degree one. Consequently, the group velocity, having a superior bound, becomes invariant under spatial scaling. This fact allows considering the dynamics of a family or set of Dirac fermions at different spatial dimensions and subjected to an external field and dissipation. From the degeneration of the stationary states, the non-Hermitian dynamics allows defining the configuration entropy. With the applied external field being the control parameter, an inflection point becomes associated with entropy. Consequently, an effective-mass phase transition is conjectured including the usual Dirac fermions in a graphene sheet. The critical field and the critical angle are analytically calculated.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/ac39eb