Nonadiabatic small polaron tunneling conduction in reduced Cr-doped SrTiO3-delta thin films

作者：Phan Bach Thang; Lee Jaichan^*

来源：Applied Physics Letters, 2009, 94(23): 232102.

DOI：10.1063/1.3151957

• chromium
• dielectric relaxation
• dielectric thin films
• electron-phonon interactions
• polarons
• strontium compounds
• tunnelling

We investigated the electrical conduction and dielectric relaxation of reduced Cr-doped SrTiO3-delta thin films. The electrical conduction behavior indicates the formation of small polarons in oxygen deficient Cr-doped SrTiO3-delta thin films. The associated dielectric relaxation further indicates nonadiabatic small polaron tunneling conduction. A strong electron-phonon interaction is identified based on the large polaron coupling constant, alpha approximate to 28(alpha 4).

• 出版日期2009-6-8