Nonlinear transport and noise thermometry in quasiclassical ballistic point contacts (Articolo in rivista)

Type

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

Label

• Nonlinear transport and noise thermometry in quasiclassical ballistic point contacts (Articolo in rivista) (literal)

Anno

• 2014-01-01T00:00:00+01:00 (literal)

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

• 10.1103/PhysRevB.90.161405 (literal)

Alternative label

• Tikhonov E.S.[ 1,2 ] ; Melnikov M.Yu.[ 1 ]; Shovkun D.V.[ 1,2 ] ; Sorba L.[ 3,4 ]; Biasiol G.[ 5 ]; Khrapai V.S.[ 1,2 ] (2014)
  Nonlinear transport and noise thermometry in quasiclassical ballistic point contacts
  in Physical review. B, Condensed matter and materials physics
  (literal)

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

• Tikhonov E.S.[ 1,2 ] ; Melnikov M.Yu.[ 1 ]; Shovkun D.V.[ 1,2 ] ; Sorba L.[ 3,4 ]; Biasiol G.[ 5 ]; Khrapai V.S.[ 1,2 ] (literal)

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

• http://www.scopus.com/inward/record.url?eid=2-s2.0-84908179329&partnerID=q2rCbXpz (literal)

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

• 90 (literal)

Rivista

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

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

• 16 (literal)

Note

• Scopu (literal)

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

• [ 1 ] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow District, Russia [ 2 ] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow District, Russia [ 3 ] CNR, Ist Nanosci, NEST, I-56127 Pisa, Italy [ 4 ] Scuola Normale Super Pisa, I-56127 Pisa, Italy [ 5 ] CNR IOM, Lab TASC, Area Sci Pk, I-34149 Trieste, Italy (literal)

Titolo

• Nonlinear transport and noise thermometry in quasiclassical ballistic point contacts (literal)

Abstract

• We study nonlinear transport and nonequilibrium current noise in quasiclassical point contacts (PCs) defined in a low-density, high-quality two-dimensional electron system in GaAs. At not too high bias voltages V across the PC, the noise temperature is determined by a Joule heat power and is almost independent on the PC resistance that can be associated with a self-heating of the electronic system. This commonly accepted scenario breaks down at increasing V, where we observe extra noise accompanied by a strong decrease of the PC's differential resistance. The spectral density of the extra noise is roughly proportional to the nonlinear current contribution in the PC, ?S?2F*|e?I|~V2, with the effective Fano factor F*<1, indicating that a random scattering process is involved. A small perpendicular magnetic field is found to suppress both ?I and ?S. Our observations are consistent with a concept of a draglike mechanism of the nonlinear transport mediated by electron-electron scattering in the leads of quasiclassical PCs. (literal)

Prodotto di

• Nanofotonica (MD.P06.020.002) (Modulo)
• MD.P06.017.002 Sintesi e studio di nanostrutture (MD.P06.017.006) (Modulo)

Autore CNR

• GIORGIO BIASIOL (Unità di personale interno)
• LUCIA SORBA (Unità di personale interno)

Incoming links:

Autore CNR di

• LUCIA SORBA (Unità di personale interno)
• GIORGIO BIASIOL (Unità di personale interno)

Prodotto

• Nanofotonica (MD.P06.020.002) (Modulo)
• MD.P06.017.002 Sintesi e studio di nanostrutture (MD.P06.017.006) (Modulo)

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

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