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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • I. Pallecchi
  • F. Telesio
  • D. Marré
  • S. Gariglio
  • J.-M. Triscone
  • A. Filippetti

Detail(s)

Original languageEnglish
Article number195309
Journal / PublicationPhysical Review B
Volume93
Issue number19
Online published12 May 2016
Publication statusPublished - 15 May 2020
Externally publishedYes

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 =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.

Citation Format(s)

Large phonon-drag enhancement induced by narrow quantum confinement at the LaAlO3/SrTiO3 interface. / Pallecchi, I.; Telesio, F.; Marré, D.; Li, D.; Gariglio, S.; Triscone, J.-M.; Filippetti, A.

In: Physical Review B, Vol. 93, No. 19, 195309, 15.05.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review