Altermagnetism in Heavy Fermion Systems: Mean-Field study on Kondo Lattice
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arXiv
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2024
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| author | Zhao, Miaomiao Yang, Wei-Wei Guo, Xueming Luo, Hong-Gang Zhong, Yin |
| author_facet | Zhao, Miaomiao Yang, Wei-Wei Guo, Xueming Luo, Hong-Gang Zhong, Yin |
| contents | Recently, a novel collinear magnet, i.e. the altermagnet (AM), with spin-splitting energy band and zero net magnetization have attracted great interest due to its potential spintronic applications. Here, we demonstrate AM-like phases in a microscopic Kondo lattice (KL) model with an alternating next-nearest-neighbor-hopping (NNNH). Such alternating NNNH take nonmagnetic atoms, neglected in usual antiferromagnetism study, into account when encountering real-life candidate AM materials. With the framework of fermionic parton mean-field theory, we find three different ground-states for the half-filling KL: 1) a $d$-wave AM state; 2) a coexistent phase with both $d$-wave AM and intrinsic Kondo screening effect; 3) a Kondo insulator. The AM-like states are characterized by their spin-splitting quasiparticle bands, Fermi surface, spin-resolved distribution function and conductivity. It is suggested that the magnetic quantum oscillation, scanning tunneling microscopy and charge transport measurement can detect those AM-like phases. We hope the present work may be useful for exploring AM-like phases in $f$-electron compounds such as CeNiAsO and Ce$_{4}$X$_{3}$(X=As,Sb,Bi). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_05220 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Altermagnetism in Heavy Fermion Systems: Mean-Field study on Kondo Lattice Zhao, Miaomiao Yang, Wei-Wei Guo, Xueming Luo, Hong-Gang Zhong, Yin Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science Quantum Gases Recently, a novel collinear magnet, i.e. the altermagnet (AM), with spin-splitting energy band and zero net magnetization have attracted great interest due to its potential spintronic applications. Here, we demonstrate AM-like phases in a microscopic Kondo lattice (KL) model with an alternating next-nearest-neighbor-hopping (NNNH). Such alternating NNNH take nonmagnetic atoms, neglected in usual antiferromagnetism study, into account when encountering real-life candidate AM materials. With the framework of fermionic parton mean-field theory, we find three different ground-states for the half-filling KL: 1) a $d$-wave AM state; 2) a coexistent phase with both $d$-wave AM and intrinsic Kondo screening effect; 3) a Kondo insulator. The AM-like states are characterized by their spin-splitting quasiparticle bands, Fermi surface, spin-resolved distribution function and conductivity. It is suggested that the magnetic quantum oscillation, scanning tunneling microscopy and charge transport measurement can detect those AM-like phases. We hope the present work may be useful for exploring AM-like phases in $f$-electron compounds such as CeNiAsO and Ce$_{4}$X$_{3}$(X=As,Sb,Bi). |
| title | Altermagnetism in Heavy Fermion Systems: Mean-Field study on Kondo Lattice |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science Quantum Gases |
| url | https://arxiv.org/abs/2407.05220 |