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TT: Tiefe Temperaturen
TT 9: Supraleitung: Eigenschaften, elektronische Struktur, Ordnungsparameter
TT 9.7: Talk
Tuesday, March 9, 2004, 11:15–11:30, H20
Spectroscopic investigations of the electronic structure of Nax Co O2 — •Thomas Kroll1, Martin Knupfer1, Thomas Pichler1, Bernd Büchner1, Chengtian Lin2 und Bernhard Keimer2 — 1Leibniz Institute for Solid State and Materials Research Dresden, 01171 Dresden, Germany — 2Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany
The discovery of superconductivity in Na0.35 Co O2 · 1.3H2O by Takada et al. at a Tc of about 5K initiated an increasing interest in those compounds. This superconducting compound consists of two-dimensional Co O2 layers separated by a thick insulating layer of Na+ ions and H2O. Based on the analogy to the known high Tc cuprates, it has been speculated that there is a similar underlying mechanism. In this contribution we present measurements of the electronic structure (using methods such as Electron Energy Loss Spectroscopy (EELS) and X-ray Absorption Spectroscopy (XAS)) of the mother compound Nax Co O2 which may provide an important contribution to understand the physics of cobalt superconductors.
11:30 Pause