Thermopower enhancement by fractional layer control in 2D oxide superlattices.

Choi, Woo Seok; Ohta, Hiromichi; Lee, Ho Nyung · Adv Mater · 2014

basic_science · Level V

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Abstract

Precise tuning of the 2D carrier density by using fractional δ-doping of d electrons improves the thermoelectric properties of oxide heterostructures. This promising result can be attributed to the anisotropic band structure in the 2D system, indicating that δ-doped oxide superlattices are good candidates for advanced thermoelectrics.