Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 12: Poster Session Superconductivity
TT 12.56: Poster
Montag, 11. März 2013, 15:00–19:00, Poster D
Charge-Density-Wave State in the Ladder Compound Sr10Ca4Cu24O41 under High Pressure — •Armin Huber1, Rüdiger Klingeler2, Markus Hücker3, Bernd Büchner4, and Christine Kuntscher1 — 1Experimentalphysik II, Universität Augsburg, D-86159 Augsburg, Germany — 2Kirchhoff-Institute for Physics, D-69120 Heidelberg, Germany — 3Brookhaven National Laboratory, Upton, NY 11973-5000, USA — 4Leibniz-Institut für Festkörper-und Werkstoffforschung Dresden, PF 27 01 16, 01171 Dresden, Germany
Besides the occurrence of superconductivity under pressure in the two-leg ladder compound Sr10Ca4Cu24O41, the existence of a competing charge density wave (CDW) ground state is a highly interesting phenomenon in this material. An earlier study demonstrated how the CDW is suppressed by increasing the calcium content, which was attributed to increased dimensionality and disorder [1].
However, no information is currently available about the evolution of the CDW under pressure. Therefore, we studied the polarization-dependent optical response of Sr10Ca4Cu24O41 in the mid-infrared frequency range as a function of temperature and pressure. Based on these results, we can extend the phase diagram and discuss more quantitatively how holes are transferred from the chains to the ladders under the application of pressure.
Supported by the DFG.
[1] T.Vuletić et al., Phys. Rev. Lett. 90, 257002 (2003)