Direct angle resolved photoemission spectroscopy and superconductivity of strained high- T c films

Pavuna, Davor
Ariosa, Daniel
Cloetta, Dominique
Cancellieri, Claudia
Abrecht, Mike

Publication date

June 2018

Abstract

Since 1997 we systematically perform direct angle resolved photoemission spectroscopy (ARPES) on in-situ grown thin (<30 nm) cuprate films. Specifically, we probe low-energy electronic structure and properties of high-T c superconductors (HTSC) under different degrees of epitaxial (compressive vs. tensile) strain. In overdoped and underdoped in-plane compressed (the strain is induced by the choice of substrate) ≈15 nm thin La2 − x Sr x CuO4 (LSCO) films we almost double T c to 40 K, from 20 K and 24 K, respectively. Yet the Fermi surface (FS) remains essentially two-dimensional. In contrast, ARPES data under tensile strain exhibit the dispersion that is three-dimensional, yet T c drastically decreases. It seems that the in-plane compressive...

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Direct angle resolved photoemission spectroscopy and superconductivity of strained high- T c films

Abstract

Extracted data

Direct angle resolved photoemission spectroscopy and superconductivity of strained high- T c films

Abstract

Extracted data

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