Roman Mankowsky is awarded the Reimar Lüst Grant
of the Max Planck Society for his PhD studies
Read moreMarta Gibert receives SNSF Professorship
for her project on Functional oxide heterostructures by design.
Read morePublication Detail / Abstract
Large phonon-drag enhancement induced by narrow quantum confinement at the LaAlO3/SrTiO3 interface
published in Physical Review B on May 12, 2016
> Full text via publisher
The thermoelectric power of the two-dimensional electron system (2DES) at the LaAlO3/SrTiO3 interface is explored below room temperature, in comparison with that of Nb-doped SrTiO3 single crystals. For the interface, we find a region below T = 50 K where thermopower is dominated by phonon drag, whose amplitude is hugely amplified with respect to the corresponding bulk value, reaching values ∼mV/K and above. The phonon-drag enhancement at the interface is traced back to the tight carrier confinement of the 2DES, and represents a sharp signature of strong electron-acoustic phonon coupling at the interface.
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