Real-space Loop Current Pattern in Time-reversal-symmetry Breaking Phase in Kagome Metals
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866916140245057536 |
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| author | Shimura, Koki Tazai, Rina Yamakawa, Youichi Onari, Seiichiro Kontani, Hiroshi |
| author_facet | Shimura, Koki Tazai, Rina Yamakawa, Youichi Onari, Seiichiro Kontani, Hiroshi |
| contents | The charge loop current (cLC) state has attracted increasing attention in kagome metals. Here, we calculate the spontaneous currents along the nearest sites $i$ and $j$, $J_{i,j}$, induced by the cLC order that is the imaginary and odd-parity hopping integral modulation $δt_{i,j}$. We reveal that the magnitude of $J_{i,j}$ strongly depends on the nearest sites $i$ and $j$ in the $2\times2$ cLC state, where $η\equiv |δt_{i,j}|$ is equivalent for all nearest sites. The obtained $J_{i,j}$ becomes large near the van-Hove singularity (vHS) filling ($n\sim n_{vHS}$) even when $η$ is fixed. Interestingly, the obtained $J_{i,j}$ exhibits the logarithmic divergence behavior at low temperatures for $n\sim n_{vHS}$ with a fixed $η$, by reflecting the vHS points that are the characteristic of kagome metals. The present study provides useful information for local electronic state measurements, such as the site-selective NMR and STM experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_07256 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Real-space Loop Current Pattern in Time-reversal-symmetry Breaking Phase in Kagome Metals Shimura, Koki Tazai, Rina Yamakawa, Youichi Onari, Seiichiro Kontani, Hiroshi Strongly Correlated Electrons Superconductivity The charge loop current (cLC) state has attracted increasing attention in kagome metals. Here, we calculate the spontaneous currents along the nearest sites $i$ and $j$, $J_{i,j}$, induced by the cLC order that is the imaginary and odd-parity hopping integral modulation $δt_{i,j}$. We reveal that the magnitude of $J_{i,j}$ strongly depends on the nearest sites $i$ and $j$ in the $2\times2$ cLC state, where $η\equiv |δt_{i,j}|$ is equivalent for all nearest sites. The obtained $J_{i,j}$ becomes large near the van-Hove singularity (vHS) filling ($n\sim n_{vHS}$) even when $η$ is fixed. Interestingly, the obtained $J_{i,j}$ exhibits the logarithmic divergence behavior at low temperatures for $n\sim n_{vHS}$ with a fixed $η$, by reflecting the vHS points that are the characteristic of kagome metals. The present study provides useful information for local electronic state measurements, such as the site-selective NMR and STM experiments. |
| title | Real-space Loop Current Pattern in Time-reversal-symmetry Breaking Phase in Kagome Metals |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2312.07256 |