1. (Sr1−Ca )3Ru2O7 system: optical and ARPES results
- Author
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Matthias C. Schabel, Zhi-Xun Shen, T. Startseva, A. V. Puchkov, Thomas Timusk, Dmitri Basov, and Gang Cao
- Subjects
Materials science ,Condensed matter physics ,Bilayer ,Doping ,Analytical chemistry ,Angle-resolved photoemission spectroscopy ,General Chemistry ,Electronic structure ,Condensed Matter Physics ,Optical conductivity ,Metal ,visual_art ,Phase (matter) ,visual_art.visual_art_medium ,General Materials Science ,Cuprate - Abstract
We present results of the first optical and angle-resolved photoemission (ARPES) measurements on the bilayer (Sr 1− x Ca x ) 3 Ru 2 O 7 , or (Ca/Sr)327, system. While the real part of optical conductivity, σ 1 ( ω ), of Sr327 is similar to that of the high- T c cuprates, σ 1 ( ω ) of Ca327 can be described almost entirely by a single broad Drude-like component. The ARPES results show a dramatic change of the low-energy electronic structure with increasing Ca doping from a normal band metal to a narrow-band marginally metallic phase with a critical behavior at x ≃0.33.
- Published
- 1998
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