Limitations to the room temperature mobility of two- and three-dimensional electron liquids in SrTiO3

作者：Mikheev Evgeny^*; Himmetoglu Burak; Kajdos Adam P; Moetakef Pouya; Cain Tyler A; Van de Walle Chris G; Stemmer Susanne

来源：Applied Physics Letters, 2015, 106(6): 062102.

DOI：10.1063/1.4907888

We analyze and compare the temperature dependence of the electron mobility of two-and three-dimensional electron liquids in SrTiO3. The contributions of electron-electron scattering must be taken into account to accurately describe the mobility in both cases. For uniformly doped, three-dimensional electron liquids, the room temperature mobility crosses over from longitudinal optical (LO) phonon-scattering-limited to electron-electron-scattering-limited as a function of carrier density. In high-density, two-dimensional electron liquids, LO phonon scattering is completely screened and the mobility is dominated by electron-electron scattering up to room temperature. The possible origins of the observed behavior and the consequences for approaches to improve the mobility are discussed.

• 出版日期2015-2-9