Microscopic Theory of the Thermodynamic Properties of SraRu207

The thermodynamic properties of the bilayer ruthenate compound Sr3Ru2O7 at very low temperatures are inves- tigated by using a tight-binding model yielding the realistic band structure combined with the on-site interactions treated at the mean-field level. We find that both the total density of stat...

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Bibliographic Details
Published in:中国物理快报：英文版 2016 (3), p.86-90
Main Author: 李伟正 吴从军
Format: Article
Language:English
Subjects:
临界磁场
各向异性散射
微观理论
热力学性质
相互作用
紧束缚模型
能带结构
费米能量
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Summary:The thermodynamic properties of the bilayer ruthenate compound Sr3Ru2O7 at very low temperatures are inves- tigated by using a tight-binding model yielding the realistic band structure combined with the on-site interactions treated at the mean-field level. We find that both the total density of states at the Fermi energy and the entropy exhibit a sudden increase near the critical magnetic field for the nematic phase, echoing the experimental find- ings. A new mechanism to explain the anisotropic transport properties is proposed based on scatterings at the anisotropic domain boundaries. Our results suggest that extra cares are necessary to isolate the contributions due to the quantum criticality from the band structure singularity in Sr3Ru2O7.
ISSN:0256-307X
1741-3540