Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 42: Correlated Electrons: Frustrated Magnets - Strong Spin-Orbit Coupling 2

TT 42.11: Vortrag

Mittwoch, 22. März 2017, 12:15–12:30, HSZ 304

Effect of symmetry and local distortions on fractionalized excitations in Kitaev Systems — •Peter Lemmens¹, Vladimir Gnezdilov^1,2, Alexander Glamazda^1,2,3, S.-H. Do³, K.-Y. Choi³, Angela Möller⁴, Friedrich Freund⁵, and Philipp Gegenwart⁵ — ¹TU-BS Braunschweig — ²ILTP Kharkov — ³CAU Seoul — ⁴IAC-AC, JGU Mainz — ⁵EP-VI, ZEKM, Augsburg

In Kitaev physics the role of symmetry is crucial. A prerequisite of the Kitaev model demands uniaxial threefold symmetry of the iridium complex. [1,2] Therefore, the comparison of different systems representing the Kitatev model on different honeycomb-like lattices [3] is an important topic. We performed Raman scattering investigations on the continuum of fractionalized excitations to understand the role of symmetry, local distortions and dimensionality. In detail, we will report on data of α-RuCl₃ as well as 2D/3D (Na,Li)₂IrO₃ and related compounds.

Work supported by RTG-DFG 1952/1, the Laboratory for Emerging Nanometrology, TU Braunschweig, and NTH Contacs in Nanosystems.

[1] G. Jackeli and G. Khaliullin, Phys. Rev. Lett. 102, 017205 (2009)

[2] M. Becker, M. Hermanns, B. Bauer, M. Garst and S. Trebst, Phys. Rev. B 91, 155135 (2015)

[3] A. Glamazda, P. Lemmens, S.-H. Do, K.-Y. Choi, Nature Commun. 7, 12286 (2016).