Analysis of the crystal electric field parameters of YbNi4P2. (12th July 2018)

• Record Type: Journal Article
• Authors: Huesges, Z; Kliemt, K; Krellner, C; Sarkar, R; Klauß, H-H; Geibel, C; Rotter, M; Novák, P; Kuneš, J; Stockert, O
• Is Part Of: New journal of physics. Volume 20:Number 7(2018:Jul.)
• Publication Date: 2018-07-12
• Subjects: heavy-fermions -- crystal electric field -- density functional theory -- basal plane anisotropy; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/aace35
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: The crystal electric field (CEF) scheme of YbNi4 P2 is determined, based on experimental data from inelastic neutron scattering, heat capacity, susceptibility and NMR measurements. Despite the tetragonal crystal structure, 9 parameters are needed to describe the crystal field in YbNi4 P2 due to the orthorhombic site symmetry of the Yb ion. A large basal plane anisotropy is detected by the local probe NMR. Our analysis yields CEF excitation energies of 8.5, 12.5 and roughly 30 meV and a ground state wave function that is dominated by the 5 / 2 state. Furthermore, we present an analysis of the CEF scheme based on density functional theory calculations, which confirms the large basal plane anisotropy.