title: Microscopic origin of universal quasilinear band structures of transparent conducting oxides.
abstract: 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.
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-755, Korea.
authors.forename: Youngho
authors.initials: Y
authors.lastname: Kang
authors.forename: Sang Ho
authors.initials: SH
authors.lastname: Jeon
authors.forename: Young-Woo
authors.initials: YW
authors.lastname: Son
authors.forename: Young-Su
authors.initials: YS
authors.lastname: Lee
authors.forename: Myungkwan
authors.initials: M
authors.lastname: Ryu
authors.forename: Sangyoon
authors.initials: S
authors.lastname: Lee
authors.forename: Seungwu
authors.initials: S
authors.lastname: Han