Planar array of semiconducting nanotubes in an external electric field: Collective screening and polarizability

T. A. Sedrakyan, E. G. Mishchenko, M. E. Raikh

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We study theoretically the charge separation in a planar array of semiconducting nanotubes (NTs) of length, 2h, placed in an external electric field, F, parallel to their axes. By employing the conformal mapping, we find analytically the exact distribution of the induced charge density for the arbitrary ratio of the gap, Eg, and the voltage drop, eFh, across the NT. We use the result obtained to (i) trace the narrowing of the neutral strip at the center of the NT with increasing F, (ii) analyze the polarizability of the array as a function of Eg, and (iii) study the field enhancement near the tips.

Original languageEnglish (US)
Article number235423
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number23
DOIs
StatePublished - 2006

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