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arXiv · 1705.00846

Symmetry-enforced heavy-fermion physics in the quadruple-perovskite CaCu3Ir4O12

Min Liu·Yuanji Xu·Danqing Hu·Zhaoming Fu·Ninghua Tong·Xiangrong Chen·Jinguang Cheng·Wenhui Xie·Yi-feng Yang
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Abstract

Heavy-fermion materials are mostly rare-earth or actinide intermetallics with very few exceptions in d-electron systems. The physical mechanism for these d-electron heavy fermion systems remains unclear. Here by studying the quadruple-perovskite CaCu3Ir4O12, we propose a symmetry-based mechanism that may enforce heavy-fermion physics in d-electron systems. We show that electron hoppings between neighboring Cu 3d-orbitals are strictly prohibited by the crystal symmetry, so that Cu 3d-electrons can only become delocalized through hybridization with other more itinerant bands, resembling that in typical heavy-fermion rare-earth intermetallics. This provides a useful way to enforce heavy-fermion physics in d-electron systems and may help future design of new heavy-fermion materials.

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Min Liu, Yuanji Xu, Danqing Hu, Zhaoming Fu, Ninghua Tong, Xiangrong Chen, Jinguang Cheng, Wenhui Xie, Yi-feng Yang. 2017-05-02. Symmetry-enforced heavy-fermion physics in the quadruple-perovskite CaCu3Ir4O12. https://arxiv.org/abs/1705.00846

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