Microscopic Origin of Universal Quasilinear Band Structures of Transparent Conducting Oxides
- Microscopic Origin of Universal Quasilinear Band Structures of Transparent Conducting Oxides
- Youngho Kang; Sang Ho Jeon; Young-Woo Son; 이영수; Myungkwan Ryu; Sangyoon Lee; Seungwu Han
- Issue Date
- Physical review letters
- VOL 108, NO 19, 196404-1-196404-5
- A tight-binding-based microscopic theory is developed that accounts for quasilinear conduction bands
appearing commonly in transparent conducting oxides. It is found that the interaction between oxygen p
and metal s orbtials plays a critical role in determining the band structure around the conduction-band
minimum. Under certain types of short-range orders, the tight-binding model universally leads to a
dispersion relation which corresponds to that of the massive Dirac particle. The impact of the graphenelike
band structure is demonstrated by evaluating the electron mobility of highly doped n-type ZnO.
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