Programmable persistent interfacial metallic state induced by frozen ions in inorganic-glass solid electrolyte

Kouji Taniguchi, Takayuki Fukamichi, Kenji Itaka, Hidenori Takagi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Electric field control of charge carrier density through dielectric layers has long been a key technology in the semiconductor industry and condensed-matter physics. The new carrier-doping method by the electric double layers (EDLs) opens up the route to access clean carrier doping with high carrier density, but this method is not practical for a switching device due to its slow response to the electric field. However, if this slow response could be stopped at room temperature as an extreme case, the EDL method can become the practical means for materials design, which produces a persistent carrier-doped state without impurity introduction or continuous supply of external electric fields. Here, it is demonstrated that the thermally programmable persistent interfacial metallic state can be realized around room temperature by all-solid heterointerface devices using an inorganic-glass solid electrolyte as a gate insulator. The proposed device, in this study, could pave the way for designing a new category of a highly carrier-doped semiconductor. A programmable interfacial persistent metallic state is realized up to near room temperature at the interface between the polarized solid glass-electrolyte and SrTiO3. The electric double layer (EDL) is formed from cations and electrons in the all-solid heterointerface devices. By freezing motion of cations within the EDL, the persistent metallic state is stabilized even after removing the external electric field up to near room temperature.

Original languageEnglish
Pages (from-to)3043-3048
Number of pages6
JournalAdvanced Functional Materials
Issue number20
Publication statusPublished - 2015 May 1


  • electric double layers
  • field-effect transistors
  • inorganic solid electrolytes
  • interfaces
  • quasi-2D electron gas

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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