Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 20: Correlated Electrons: Spin Systems and Itinerant Magnets - Frustrated Magnets II

TT 20.6: Vortrag

Montag, 31. März 2014, 16:15–16:30, HSZ 304

Multipolar states in coupled frustrated spin-1/2 chains with exchange anisotropy — •Satoshi Nishimoto¹, Stefan-Ludwig Drechsler¹, Roman Kuzian^1,2, Johannes Richter³, and Jeroen van den Brink¹ — ¹IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany — ²Institute for Problems of Materials Science NASU, 03180 Kiev, Ukraine — ³Universität Magdeburg, Institut für Theoretische Physik, Germany

We studied coupled frustrated spin-1/2 Heisenberg chains at high magnetic field. The effects of inter-chain couplings and easy-axis exchange anisotropy on the multipolar states were considered using the spin-wave theory and density-matrix renormalization group method. We quantified the instability towards the formation of multipolar states against various kinds of antiferromagnetic and ferromagnetic inter-chain couplings, and also found that an easy-axis anisotropy of the ferromagnetic in-chain nearest-neighbor exchange significantly enhances the multipolar stability region [1]. We will discuss the relevance to edge-shared cuprate spin-chain compounds such as LiVCuO₄, PbCuSO₄(OH)₂ [2], etc, which are found to be possible candidates for multipolar physics.
S. Nishimoto, S.-L. Drechsler, R.O. Kuzian, J. Richter, J. van den Brink, arXiv:1303.1933v1.
M. Schäpers, A.U.B. Wolter, S.-L. Drechsler, S. Nishimoto, R. Vogel, W. Schottenhamel, B. Büchner, J. Richter, B. Ouladdiaf, M. Uhlarz, R. Beyer, Y. Skourski, J. Wosnitza, K.C. Rule, M. Reehuis, B. Willenberg, S. Süllow, Phys. Rev. B 88, 195138 (2013).