_eti First-order metal-insulator transition and spin-polarized tunneling in (formula presented) nanocrystals

Pankaj Poddar, Tcipi Fried, Gil Markovich

Research output: Contribution to journalArticlepeer-review

Abstract

Tunneling junctions of stacked monolayers of uniform, organically functionalized (formula presented) nanocrystals of 5.5 nm average diameter were prepared. Current-voltage characteristics of the junctions were studied as function of temperature and magnetic field. An abrupt increase in the resistance was observed on cooling below 96 K. This is attributed to the Verwey metal-insulator transition in the nanocrystals. Above 96 K, the (formula presented) curves reflect the density of states of the narrow conduction band. This conductance peak is sensitive to the external magnetic field and exhibits large magnetoresistance.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number17
DOIs
StatePublished - 2002

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