Quantum effects in the capacitance between a pair of thin and slightly separated SrTiO3 slabs: A first-principles study

Kazuyuki Uchida, Hiroyuki Kageshima, and Hiroshi Inokawa
Phys. Rev. B 74, 035408 – Published 10 July 2006

Abstract

We calculated the capacitance between a pair of thin and slightly separated SrTiO3 slabs (electrodes) by using first-principles approaches with the enforced Fermi-energy difference method. The calculated capacitance exhibited several quantum effects, which were successfully understood by relating them to the density of states of the electrodes and the effective and variable interelectrode distance. The present work is an indispensable step towards exhaustive and systematic first-principles investigations of the capacitors whose electrodes are composed of a series of transition-metal oxides.

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  • Received 13 April 2006

DOI:https://doi.org/10.1103/PhysRevB.74.035408

©2006 American Physical Society

Authors & Affiliations

Kazuyuki Uchida*, Hiroyuki Kageshima, and Hiroshi Inokawa

  • NTT Basic Research Laboratories, 3-1 Morinosato Wakamiya, Atsugi-Shi, Kanagawa 243-0198, Japan

  • *Present address: Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8577, Japan. Email address: kuchida@comas.frsc.tsukuba.ac.jp
  • Present address: Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku, Hamamatsu 432-8011, Japan.

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Issue

Vol. 74, Iss. 3 — 15 July 2006

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