Direct ARPES and Tc enhancement in compressively strained LSCO-214 films

被引：0

作者：

Pavuna, D ^{[1
]}

Abrecht, M ^{[1
]}

Ariosa, D ^{[1
]}

Cloetta, D ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Phys Complex Matter, CH-1015 Lausanne, Switzerland

来源：

NEW CHALLENGES IN SUPERCONDUCTIVITY: EXPERIMENTAL ADVANCES AND EMERGING THEORIES | 2005年 / 183卷

关键词：

cuprates; superconductivity; photoemission; films; strain; T-c; laser ablation;

D O I：

10.1007/1-4020-3085-1_2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Direct ARPES studies on in-situ grown strained LSCO-214 films show striking strain effects on the electronic structure. The Fermi surface (FS) of LSCO-214 evolves with doping, yet changes even more significantly with strain. The compressive strain changes the Fermi surface topology from hole-like to electron-like and causes band dispersion along k(x) and the Fermi level crossing before the Brillouin zone boundary, in sharp contrast to the 'usual' flat band remaining approximate to 30meV below E-F measured on unstrained samples. The associated reduction of the density of states does not diminish the superconductivity; rather, T-c is strongly enhanced (up to factor of two) in compressively strained thin films.

引用

页码：9 / 14

页数：6

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