Regensburg 2019 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 59: Complex Oxides Interfaces and Charge Order
TT 59.5: Vortrag
Donnerstag, 4. April 2019, 16:00–16:15, H22
Coupled charge density wave and magnetism in TbTe3 — •Shravani Chillal1, Enrico Schierle1, Eugen Weschke1, Jens Uwe Hoffmann1, Fabiano Yokaichiya1, Alexandre Vassiliev2, Olga Volkova2, Pierre Monceau3, and Bella Lake1,4 — 1Helmholtz-Zentrum-Berlin für Materialien und Energie, Germany — 2M.V. Lomonosov Moscow State University, Russia — 3Université Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL, France — 4Technische Universität Berlin, Germany
TbTe3 is a quasi-two dimensional system displaying a rich combination of quantum cooperative phenomenon including two charge density wave orders, complex incommensurate and commensurate magnetic orders as well as unconventional superconductivity under pressure. Hence, a delicate interplay of the three collective states is expected similar to the copper-oxide high-Tc superconductors leading to a novel phase diagram. Here, we present the interaction of the CDW and magnetic orders in TbTe3 as a function of temperature and magnetic field. We find that these two collective states coexist at all the temperatures below the magnetic transition and that the magnetic order is coupled to the CDW state such that the magnetic wave vector can be described in terms of the CDW wave vector. Furthermore, we find an additional field induced phase where the magnetic wave vector locks-in to the CDW wave vector. Therefore, TbTe3 can be considered as an ideal system to study the competition and coexistence of magnetism and CDW orders.