Probing Anisotropic Quasiparticle Dynamics and Topological Phase Transitions in Quasi‐1D Topological Insulator ZrTe5
Abstract The transition metal pentatelluride ZrTe5 exhibits rich lattice‐sensitive topological electronic states, and demonstrates great potential in photoelectric and thermoelectric devices. However, a comprehensive investigation of electron‐phonon coupling and phonon scattering process remains lim...
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Wiley
2025-08-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202504798 |
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| author | Yueying Hou Linze Li Sutao Sun Gan Liu Hongyuan Zhao Zhiheng Chen Xuejun Yan Yang‐Yang Lv Yurong Yang Shu‐Hua Yao Jian Zhou Y.B. Chen Ming‐Hui Lu Vitalyi Gusev Yan‐Feng Chen |
| author_facet | Yueying Hou Linze Li Sutao Sun Gan Liu Hongyuan Zhao Zhiheng Chen Xuejun Yan Yang‐Yang Lv Yurong Yang Shu‐Hua Yao Jian Zhou Y.B. Chen Ming‐Hui Lu Vitalyi Gusev Yan‐Feng Chen |
| author_sort | Yueying Hou |
| collection | DOAJ |
| description | Abstract The transition metal pentatelluride ZrTe5 exhibits rich lattice‐sensitive topological electronic states, and demonstrates great potential in photoelectric and thermoelectric devices. However, a comprehensive investigation of electron‐phonon coupling and phonon scattering process remains limited, despite their importance for transport properties and device optimization. Here, the hot carrier dynamics and a 1.15 THz Ag mode coherent phonon in ZrTe5 are investigated by femtosecond transient spectroscopy across 10–300 K. Notably, polarization‐dependent measurements explicitly decouple a strong anisotropic transient response, which is attributed to the effects of excited‐state electron relaxation and reflectivity modulation by displacive excited coherent phonons. The temperature dependence of electron relaxation time in ZrTe5 shows an inflection point, first offering the ultrafast dynamical signature of a temperature‐driven Lifshitz transition. At low temperatures, a long‐lived electron relaxation component emerges in the transient response, providing possible evidence of topological surface states in ZrTe5. In addition, the temperature‐dependent coherent phonon is also analyzed, revealing that its scattering is dominated by three‐phonon interactions and exhibits a relatively long lifetime compared to other modes. This work deepens the understanding of ultrafast processes in ZrTe5, resolves longstanding questions, paves the way for studying electronic phase transitions, and advances ZrTe5's application in optoelectronic and quantum devices. |
| format | Article |
| id | doaj-art-4a57d17eef44434c922e8eba9ffa22e3 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-4a57d17eef44434c922e8eba9ffa22e32025-08-23T14:14:08ZengWileyAdvanced Science2198-38442025-08-011231n/an/a10.1002/advs.202504798Probing Anisotropic Quasiparticle Dynamics and Topological Phase Transitions in Quasi‐1D Topological Insulator ZrTe5Yueying Hou0Linze Li1Sutao Sun2Gan Liu3Hongyuan Zhao4Zhiheng Chen5Xuejun Yan6Yang‐Yang Lv7Yurong Yang8Shu‐Hua Yao9Jian Zhou10Y.B. Chen11Ming‐Hui Lu12Vitalyi Gusev13Yan‐Feng Chen14National Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaNational Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaNational Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaNational Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaNational Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaNational Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaNational Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaNational Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaNational Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaNational Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaNational Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaNational Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaNational Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaLaboratoire d'Acoustique de l'Universite du Mans (LAUM), UMR 6613, Institut d'Acoustigue ‐ Graduate School (A‐GS).CNRS Le Mans Université Le Mans FranceNational Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 ChinaAbstract The transition metal pentatelluride ZrTe5 exhibits rich lattice‐sensitive topological electronic states, and demonstrates great potential in photoelectric and thermoelectric devices. However, a comprehensive investigation of electron‐phonon coupling and phonon scattering process remains limited, despite their importance for transport properties and device optimization. Here, the hot carrier dynamics and a 1.15 THz Ag mode coherent phonon in ZrTe5 are investigated by femtosecond transient spectroscopy across 10–300 K. Notably, polarization‐dependent measurements explicitly decouple a strong anisotropic transient response, which is attributed to the effects of excited‐state electron relaxation and reflectivity modulation by displacive excited coherent phonons. The temperature dependence of electron relaxation time in ZrTe5 shows an inflection point, first offering the ultrafast dynamical signature of a temperature‐driven Lifshitz transition. At low temperatures, a long‐lived electron relaxation component emerges in the transient response, providing possible evidence of topological surface states in ZrTe5. In addition, the temperature‐dependent coherent phonon is also analyzed, revealing that its scattering is dominated by three‐phonon interactions and exhibits a relatively long lifetime compared to other modes. This work deepens the understanding of ultrafast processes in ZrTe5, resolves longstanding questions, paves the way for studying electronic phase transitions, and advances ZrTe5's application in optoelectronic and quantum devices.https://doi.org/10.1002/advs.202504798anisotropic polarizaion dependencequasipartical dynamicstopological insulatortopological phase transitionzirconium pentelluride |
| spellingShingle | Yueying Hou Linze Li Sutao Sun Gan Liu Hongyuan Zhao Zhiheng Chen Xuejun Yan Yang‐Yang Lv Yurong Yang Shu‐Hua Yao Jian Zhou Y.B. Chen Ming‐Hui Lu Vitalyi Gusev Yan‐Feng Chen Probing Anisotropic Quasiparticle Dynamics and Topological Phase Transitions in Quasi‐1D Topological Insulator ZrTe5 Advanced Science anisotropic polarizaion dependence quasipartical dynamics topological insulator topological phase transition zirconium pentelluride |
| title | Probing Anisotropic Quasiparticle Dynamics and Topological Phase Transitions in Quasi‐1D Topological Insulator ZrTe5 |
| title_full | Probing Anisotropic Quasiparticle Dynamics and Topological Phase Transitions in Quasi‐1D Topological Insulator ZrTe5 |
| title_fullStr | Probing Anisotropic Quasiparticle Dynamics and Topological Phase Transitions in Quasi‐1D Topological Insulator ZrTe5 |
| title_full_unstemmed | Probing Anisotropic Quasiparticle Dynamics and Topological Phase Transitions in Quasi‐1D Topological Insulator ZrTe5 |
| title_short | Probing Anisotropic Quasiparticle Dynamics and Topological Phase Transitions in Quasi‐1D Topological Insulator ZrTe5 |
| title_sort | probing anisotropic quasiparticle dynamics and topological phase transitions in quasi 1d topological insulator zrte5 |
| topic | anisotropic polarizaion dependence quasipartical dynamics topological insulator topological phase transition zirconium pentelluride |
| url | https://doi.org/10.1002/advs.202504798 |
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