A microscopic approach to nonlinear theory of spin-charge separation
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866915544741969920 |
|---|---|
| author | Tsyplyatyev, Oleksandr Jin, Yiqing Moreno, María Tan, Wooi Kiat Ford, Christopher J. B. |
| author_facet | Tsyplyatyev, Oleksandr Jin, Yiqing Moreno, María Tan, Wooi Kiat Ford, Christopher J. B. |
| contents | The fate of spin-charge separation beyond the low energy remains elusive up to now. Here we develop a microscopic theory of the correlation functions using the strong coupling expansion of the Hubbard model and demonstrate its validity down to the experimentally relevant $r_{\rm s}>1$. Evaluating the spectral function, we show the general stability of the nonlinear spin-charge modes in whole energy band and investigate all the nonlinear features systematically. We confirm the general prediction experimentally in semiconductor quantum wires. Furthermore, we observe a signal consistent with a continuum of the nonlinear excitations and with a final spectral density around the $3 k_{\rm F}$ point, indicating the robustness of the Hubbard model predictions for a finite range interaction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_09515 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A microscopic approach to nonlinear theory of spin-charge separation Tsyplyatyev, Oleksandr Jin, Yiqing Moreno, María Tan, Wooi Kiat Ford, Christopher J. B. Strongly Correlated Electrons Mesoscale and Nanoscale Physics Quantum Physics The fate of spin-charge separation beyond the low energy remains elusive up to now. Here we develop a microscopic theory of the correlation functions using the strong coupling expansion of the Hubbard model and demonstrate its validity down to the experimentally relevant $r_{\rm s}>1$. Evaluating the spectral function, we show the general stability of the nonlinear spin-charge modes in whole energy band and investigate all the nonlinear features systematically. We confirm the general prediction experimentally in semiconductor quantum wires. Furthermore, we observe a signal consistent with a continuum of the nonlinear excitations and with a final spectral density around the $3 k_{\rm F}$ point, indicating the robustness of the Hubbard model predictions for a finite range interaction. |
| title | A microscopic approach to nonlinear theory of spin-charge separation |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2510.09515 |