Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 71: Correlated Electrons: Poster Session

TT 71.32: Poster

Mittwoch, 18. März 2015, 15:00–18:00, Poster B

Crystal growth of frustrated materials with kagome-lattices — •Christian Klein, Pascal Puphal, and Cornelius Krellner — Physikalisches Institut, Goethe-Universität, Frankfurt, Germany

Kagome-lattices are promising materials to investigate frustrated quantum spin systems with a possible quantum spin liquid (QSL) ground state [1]. High-quality single crystals are essential to distinguish between disordered magnetic ground-states and a true QSL.

We report on synthesis and characterization of the materials Herbertsmithite (Cu3Zn(OH)6Cl2) and Barlowite(Cu4(OH)6BrF), which represent model systems for two-dimensional Kagome-layered structures [2]. The kagome-layers are build up by copper ions and separated from each other through a transition-metal cation, so that a quasi-two-dimensional system is created [3]. Single crystals were grown under hydrothermal conditions.

We present the details of the crystal growth and preliminary substitution experiments to study their influence on the magnetic properties.

[1] P. A. Lee, Science 321, 1306 (2008).

[2] M. Shores et al., J. Am. Chem. Soc. 127, 13462 (2005).

[3] S. Chu et al., Appl. Phys. Lett. 98, 092508 (2011).

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