http://www.cnr.it/ontology/cnr/individuo/prodotto/ID205189

Anderson-Mott transition in arrays of a few dopant atoms in a silicon transistor (Articolo in rivista)

Type

Label

Anderson-Mott transition in arrays of a few dopant atoms in a silicon transistor (Articolo in rivista) (literal)

Anno

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

Alternative label

Prati E, Hori M, Guagliardo F, Ferrari G, Shinada T (2012)
Anderson-Mott transition in arrays of a few dopant atoms in a silicon transistor
in Nature nanotechnology (Print)
(literal)

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

Pagina inizio

Pagina fine

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

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

Rivista

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

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

Note

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

[ 1 ] CNR, IMM, Lab MDM, I-20864 Agrate Brianza, Italy [ 2 ] Waseda Univ, Grad Sch Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan [ 3 ] Politecn Milan, I-20133 Milan, Italy [ 4 ] Waseda Univ, Waseda Inst Adv Study, Shinjuku Ku, Tokyo 1698050, Japan (literal)

Titolo

Anderson-Mott transition in arrays of a few dopant atoms in a silicon transistor (literal)

Abstract

Dopant atoms are used to control the properties of semiconductors in most electronic devices. Recent advances such as single-ion implantation(1-5) have allowed the precise positioning of single dopants in semiconductors as well as the fabrication of single-atom transistors(6-9), representing steps forward in the realization of quantum circuits(10-14). However, the interactions between dopant atoms have only been studied in systems containing large numbers of dopants, so it has not been possible to explore fundamental phenomena such as the Anderson-Mott transition between conduction by sequential tunnelling through isolated dopant atoms, and conduction through thermally activated impurity Hubbard bands(15-18). Here, we observe the Anderson-Mott transition at low temperatures in silicon transistors containing arrays of two, four or six arsenic dopant atoms that have been deterministically implanted along the channel of the device. The transition is induced by controlling the spacing between dopant atoms. Furthermore, at the critical density between tunnelling and band transport regimes, we are able to change the phase of the electron system from a frozen Wigner-like phase to a Fermi glass by increasing the temperature. Our results open up new approaches for the investigation of coherent transport, band engineering and strongly correlated systems in condensed-matter physics. (literal)

Prodotto di