Nonlinear Pauli susceptibilities in Sr3Ru2O7 and universal features of itinerant metamagnetism

Article

关键词: GROUND-STATE;    SPIN;    ELECTRONS;   

DOI  :  10.1103/PhysRevB.97.100403

来源: SCIE

【 摘 要 】

We report measurements of the third order, chi(3), and fifth order, chi(5), susceptibilities in an itinerant oxide metamagnet, Sr3Ru2O7, for magnetic fields both parallel and perpendicular to the c axis. These susceptibilities exhibitmaxima in their temperature dependence such that T-1 approximate to 2T(3) approximate to 4T(5) where T-i is the position in temperature where a peak in the ith - order susceptibility occurs. These features taken together with the scaling of the critical field with the temperature T-1 observed in a diverse variety of itinerant metamagnets find a natural explanation in a single-band model with one Van Hove singularity (VHS) and on-site repulsion U. The separation of the VHS from the Fermi energy Delta, sets a single energy scale, which is the primary driver for the observed features of itinerant metamagnetism at low temperatures.

【 授权许可】

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