Regensburg 2016 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 42: Correlated Electrons: Frustrated Magnets - Cu-based Systems & FeCr

TT 42.6: Talk

Wednesday, March 9, 2016, 10:45–11:00, H18

Synthesis and crystal growth of Cu-based kagome materials — •Christian Klein, Franz Ritter, and Cornelius Krellner — Physikalisches Institut, Goethe-Universität Frankfurt, D-60438 Frankfurt am Main

Magnetic frustration in kagome-type lattices can lead to novel type of ground states, the so-called Quantum Spin Liquids (QSLs). [1] For studying experimentally the properties of QSLs new materials in single crystalline form are essential.We report on the crystal growth under hydrothermal conditions and characterization of the new material Barlowite (Cu₄(OH)₆BrF). [2] Substitution of the cation on the interlayer-site enables us to modify the physical properties. Selective use of non-magnetic ions on the interlayer position leads to a quasi-two-dimensional system by decoupling the exchange between the kagome-layers. [3] We will discuss various synthetic pathways, together with thorough structural characterization.

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

[2] H. Jeschke et al., PRB 92, 094417 (2015).

[3] Guterding et al., arXiv:1511.05686v1.