Complex magnetism and strong electronic correlations in Ce2PdGe3

Article

关键词: FERMI-LIQUID BEHAVIOR;    SUPERCONDUCTING PHASES;    SURFACE;    SYSTEM;    ORDER;    PRESSURE;    DIAGRAM;   

DOI  :  10.1103/PhysRevB.91.035102

来源: SCIE

【 摘 要 】

Single-crystal x-ray diffraction, magnetic susceptibility, magnetization, heat capacity, and electrical resistivity measurements are reported for the new tetragonal compound Ce2PdGe3, which forms in the space group P4(2)/mmc (No. 131)-a relative of the alpha-ThwSi(2)-type structure. Measurements reveal a two-part antiferromagnetic phase transition at T-N,T-1 = 10.7 K and T-N,T-2 = 9.6 K and subsequent ferromagnetlike ordering near T-C approximate to 2.25 K. The ordered ground state emerges from a lattice of Ce ions that are hybridized with the conduction electrons, as revealed by the enhanced electronic coefficient of the specific heat. gamma approximate to 50 mJ/mol-Ce-K-2 (extrapolated to T = 0 for T < T-C). Electronic structure calculations reveal a Fermi surface that includes sheets with distinct nesting vectors. Chemical/structural disorder also plays an important role, as evidenced by results from single-crystal x-ray diffraction, the width of the peaks in the heat capacity at T-N and T-C, and the small residual resistivity ratio RRR = rho(300K)/rho(0) = 1.8.

【 授权许可】

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