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TT: Fachverband Tiefe Temperaturen

TT 19: Poster Session: Correlated Electrons 1

TT 19.1: Poster

Montag, 20. März 2017, 15:00–19:00, P2-EG

Bulk and surface properties of SmRh₂Si₂ single crystals — •Jacintha Banda¹, Kristin Kliemt², Alla Chikina³, Alexander Generalov⁴, Kurt Kummer⁵, Monika Güttler³, Victor N. Antonov⁶, Yuri Kucherenko⁶, Steffen Danzenbächer³, Christoph Geibel¹, Clemens Laubschat³, Denis V. Vyalikh^{3, 7, 8, 9}, Cornelius Krellner², and Manuel Brando¹ — ¹MPI CPfS, Dresden, Germany — ²Goethe-University Frankfurt, Frankfurt, Germany — ³Dresden University of Technology, Dresden, Germany — ⁴MAX IV Laboratory, Lund, Sweden — ⁵ESRF, Grenoble, France — ⁶National Academy of Sciences of Ukraine, Kiev, Ukraine — ⁷Saint Petersburg State University, Saint Petersburg, Russia — ⁸Donostia International Physics Center, San Sebastian, Spain — ⁹IKERBASQUE, Bilbao, Spain

We present the properties of SmRh₂Si₂. Using a modified Bridgman method with indium flux we obtained platelet-shaped SmRh₂Si₂ single crystals. The magnetic ground state was characterized by magnetization, specific heat and electrical transport measurements. SmRh₂Si₂ orders antiferromagnetically below T_N = 62 K with pronounced anomalies in C(T) and ρ(T). Due to the layered structure, the crystals could be cleaved easily parallel to the Sm-layers leading to well-defined atomically flat surfaces allowing to perform ARPES to investigate the valence of the Sm ions in the bulk and at the surface [1]. We found that, in spite of the antiferromagnetic order, Sm reveals divalent admixtures to the almost trivalent ground state both in the bulk and at the surface. [1] A. Chikina et al., to be published