Universal infrared absorbance of two-dimensional honeycomb group-IV crystals (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Universal infrared absorbance of two-dimensional honeycomb group-IV crystals (Articolo in rivista) (literal)

Anno

• 2013-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1103/PhysRevB.87.035438 (literal)

Alternative label

• Lars Matthes, Paola Gori, Olivia Pulci, and Friedhelm Bechstedt (2013)
  Universal infrared absorbance of two-dimensional honeycomb group-IV crystals
  in Physical review. B, Condensed matter and materials physics (CD-ROM); APS, American physical society, College Park, MD (Stati Uniti d'America)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Lars Matthes, Paola Gori, Olivia Pulci, and Friedhelm Bechstedt (literal)

Pagina inizio

• 035438 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 87 (literal)

Rivista

• Physical review. B, Condensed matter and materials physics (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 3 (literal)

Note

• Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Institut für Festkörpertheorie und -optik, Friedrich-Schiller-Universität, Max-Wien-Platz 1, 07743 Jena, Germany ETSF and Dipartimento di Fisica, Università di Roma Tor Vergata, Via della Ricerca Scientifica 1, I-00133 Rome, Italy ETSF and CNR-ISM, Via Fosso del Cavaliere 100, I-00133 Rome, Italy (literal)

Titolo

• Universal infrared absorbance of two-dimensional honeycomb group-IV crystals (literal)

Abstract

• We show that the low-frequency absorbance of undoped graphene, silicene, and germanene has a universal value, only determined by the Sommerfeld fine-structure constant. This result is derived by means of ab initio calculations of the complex dielectric function for optical interband transitions applied to two-dimensional (2D) crystals with honeycomb geometry. The assumption of chiral massless Dirac fermions is not necessary. The low-frequency absorbance does not depend on the group-IV atom, neither on the sheet buckling nor on the orbital hybridization. We explain these findings via an analytical derivation of the relationship between absorbance and fine-structure constant for 2D Bloch electrons. The effect of deviations of the electronic bands from linearity is also discussed. (literal)

Editore

• APS, American physical society (Editore)

Prodotto di

• Microscopia a Scansione a Sonda Locale su sistemi nanostrutturati e materiali biologici (MD.P06.006.001) (Modulo)
• Institute of structure of matter (ISM) (Istituto)

Autore CNR

• PAOLA GORI (Unità di personale interno)

Incoming links:

Autore CNR di

• PAOLA GORI (Unità di personale interno)

Prodotto

• Institute of structure of matter (ISM) (Istituto)
• Microscopia a Scansione a Sonda Locale su sistemi nanostrutturati e materiali biologici (MD.P06.006.001) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Physical review. B, Condensed matter and materials physics (Rivista)

Editore di

• APS, American physical society (Editore)