Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 72: Poster Session: Correlated Electrons

TT 72.9: Poster

Mittwoch, 14. März 2018, 15:00–19:00, Poster B

High-Pressure studies on the quasi-one-dimensional heavy fermion metal YbNi₄P₂ — •Takaki Muramatsu¹, Kristin Kliemt², Cornelius Krellner², and Sven Friedemann¹ — ¹HH Wills Laboratory, University of Bristol, UK — ²Physikalisches Institut, Johann Wolfgang Goethe-Universität, Frankfurt am Main, Germany

YbNi₄P₂ is very unique system among correlated electron compounds due to the quasi-one-dimensional nature. The crystal structure is tetragonal ZrFe₄Si₂ type structure (P4₂/mnm) in which Yb chains along c-axis are separated by chains of edge-shared Ni tetrahedra. Below 0.17K, YbNi₄P₂ orders ferromagnetically (FM) with small ordered magnetic moment of 0.05µ_B [1]. YbNi₄P₂ is a rare expample where a ferromagnetic quantum critical point can be accessed [2]. Here, we present high-pressure studies of YbNi₄P₂ using a diamond-anvil pressure cell. Application of pressure on strongly correlated electron system plays an important role to discuss the quantum criticality and to study the detailed properties of the system. In this work, temperature dependence of the electrical resistivity of YbNi₄P₂ was measured under high pressure to understand the basics of competing nature among 4f valence of Yb ion, long range magnetic order and Kondo effect.
C. Krellner et al., New J. Phys, 13, 103014 (2011).
A. Steppke et al., Science, 339, 933 (2013).