UNIGE document Scientific Article
previous document  unige:114134  next document
add to browser collection
Title

Large phonon-drag enhancement induced by narrow quantum confinement at the LaAlO3/SrTiO3 interface

Authors
Pallecchi, I.
Telesio, F.
Marré, D.
Filippetti, A.
Published in Physical Review. B, Condensed Matter. 2016, vol. 93, no. 19, p. 195309
Abstract 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.
Identifiers
Full text
Structures
Research group Groupe Triscone
Citation
(ISO format)
PALLECCHI, I. et al. Large phonon-drag enhancement induced by narrow quantum confinement at the LaAlO3/SrTiO3 interface. In: Physical Review. B, Condensed Matter, 2016, vol. 93, n° 19, p. 195309. https://archive-ouverte.unige.ch/unige:114134

13 hits

2 downloads

Update

Deposited on : 2019-02-12

Export document
Format :
Citation style :