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dc.contributor.author
Bottesi, Federico
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dc.contributor.author
Zemba, Guillermo Raul
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dc.date.available
2022-10-27T11:57:07Z
dc.date.issued
2019-12
dc.identifier.citation
Bottesi, Federico; Zemba, Guillermo Raul; Universal power-law exponents in differential tunneling conductance for planar insulators near Mott criticality at low temperatures; IOP Publishing; Journal of Statistical Mechanics: Theory and Experiment; 2019; 12; 12-2019; 1-10
dc.identifier.issn
1742-5468
dc.identifier.uri
http://hdl.handle.net/11336/175118
dc.description.abstract
We consider the low-temperature differential tunneling conductance G for interfaces between a planar insulating material in the Mott-class and a metal. For values of the applied potential difference V that are not very small, there is a experimentally observed universal regime in which G ∼ Vm, where m is a universal exponent. We consider the theoretical prediction of the values of m by using the method of effective field theory (EFT), which is appropriate for discussing universal phenomena. We describe the Mott material by the EFT pertaining the long-distance behavior of a spinless Hubbard-like model with nearest neighbors interactions previously considered. At the Mott transition, the EFT is known to be given by a double Abelian Chern-Simons theory. The simplest realization of this theory at the tunneling interface yields a Conformal Field Theory with central charges (c, c) = (1, 1) and Jain filling fraction ν = 2/3 describing a pair of independent counter-propagating chiral bosons (one charged and one neutral). Tunneling from the material into the metal is, therefore, described by this EFT at the Mott critical point. The resulting tunneling conductance behaves as G ∼ V(1/ν-1), yielding the prediction m = 1/2, which compares well (within a 10% deviation) with the results for this exponent in two experimental studies considered here.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
IOP Publishing
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
BOSONISATION
dc.subject
CONFORMAL FIELD THEORY
dc.subject
EDGE STATES
dc.subject
FRACTIONAL QHE
dc.subject.classification
Física de Partículas y Campos
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Universal power-law exponents in differential tunneling conductance for planar insulators near Mott criticality at low temperatures
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-10-27T10:23:08Z
dc.journal.volume
2019
dc.journal.number
12
dc.journal.pagination
1-10
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Bottesi, Federico. Pontificia Universidad Católica Argentina "Santa María de los Buenos Aires". Facultad de Ciencias Fisicomatemáticas e Ingeniería; Argentina
dc.description.fil
Fil: Zemba, Guillermo Raul. Comisión Nacional de Energía Atómica. Gerencia del Área de Investigación y Aplicaciones No Nucleares. Gerencia Física (Centro Atómico Constituyentes). Proyecto Tandar; Argentina. Pontificia Universidad Católica Argentina "Santa María de los Buenos Aires". Facultad de Ciencias Fisicomatemáticas e Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Journal of Statistical Mechanics: Theory and Experiment
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/1742-5468/ab4fe0
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1088/1742-5468/ab4fe0
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