Saved in:
| Main Author: | |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2503.14400 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917005989249024 |
|---|---|
| author | Han, Jong E. |
| author_facet | Han, Jong E. |
| contents | Numerical renormalization group (NRG) is formulated for nonequilibrium steady-state by converting finite-lattice many-body eigenstates into scattering states. Extension of the full-density-matrix NRG for a biased Anderson impurity model, simplified by formulating with the original orbital basis as the Hamiltonian, enables detailed studies of the sub-Kondo spectral evolution in the zero-temperature limit, confirming the double-resonance structure at bias of the Kondo energy scale $T_K$. The distribution shows distinct multi-scale spectral features at energy $ω$ below the Kondo scale ($ω\lesssim T_K$) and near the bias ($ω\gtrsim V$), leading to the nonequilibrium temperature $T_{\rm loc}$ local to the Kondo dot scaling as $k_BT_{\rm loc}\approx V$ for $V\gg T_K$. The current-voltage relation in the low-temperature limit ($T\ll T_K$) deviates from the unitary limit as the bias exceeds the Kondo scale ($V/2\gtrsim T_K$) and reaches the current saturation regime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_14400 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Nonequilibrium Statistics of Biased Kondo Resonance Han, Jong E. Strongly Correlated Electrons Numerical renormalization group (NRG) is formulated for nonequilibrium steady-state by converting finite-lattice many-body eigenstates into scattering states. Extension of the full-density-matrix NRG for a biased Anderson impurity model, simplified by formulating with the original orbital basis as the Hamiltonian, enables detailed studies of the sub-Kondo spectral evolution in the zero-temperature limit, confirming the double-resonance structure at bias of the Kondo energy scale $T_K$. The distribution shows distinct multi-scale spectral features at energy $ω$ below the Kondo scale ($ω\lesssim T_K$) and near the bias ($ω\gtrsim V$), leading to the nonequilibrium temperature $T_{\rm loc}$ local to the Kondo dot scaling as $k_BT_{\rm loc}\approx V$ for $V\gg T_K$. The current-voltage relation in the low-temperature limit ($T\ll T_K$) deviates from the unitary limit as the bias exceeds the Kondo scale ($V/2\gtrsim T_K$) and reaches the current saturation regime. |
| title | Nonequilibrium Statistics of Biased Kondo Resonance |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2503.14400 |