Coupled order parameters and photoinduced domain walls in the charge density wave of (TaSe4)2I
Abstract The charge density wave in (TaSe4)2I has drawn much attention recently as a controversial candidate for an axion insulator where the CDW breaks the chiral symmetry of the Weyl semimetal. Here we use ultrafast x-ray scattering to study the collective modes of this CDW. By measuring several d...
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-04-01
|
| Series: | npj Quantum Materials |
| Online Access: | https://doi.org/10.1038/s41535-025-00762-7 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849314881853980672 |
|---|---|
| author | Ryan A. Duncan Gal Orenstein Soyeun Kim Yijing Huang Huaiyu Wang Samuel W. Teitelbaum Jade Stanton Matthew Hurley Alexander Miller Nicholas Leonard Dillon Hanlon David A. Reis Taito Osaka Yuya Kubota Tadashi Togashi Kejian Qu Daniel P. Shoemaker Takahiro Sato Mariano Trigo |
| author_facet | Ryan A. Duncan Gal Orenstein Soyeun Kim Yijing Huang Huaiyu Wang Samuel W. Teitelbaum Jade Stanton Matthew Hurley Alexander Miller Nicholas Leonard Dillon Hanlon David A. Reis Taito Osaka Yuya Kubota Tadashi Togashi Kejian Qu Daniel P. Shoemaker Takahiro Sato Mariano Trigo |
| author_sort | Ryan A. Duncan |
| collection | DOAJ |
| description | Abstract The charge density wave in (TaSe4)2I has drawn much attention recently as a controversial candidate for an axion insulator where the CDW breaks the chiral symmetry of the Weyl semimetal. Here we use ultrafast x-ray scattering to study the collective modes of this CDW. By measuring several diffraction peaks we find that the order parameter involves coupled optical and acoustic modes. For strong near-infrared excitation, the dynamics of the x-ray diffraction show evidence of photoinduced inversion of both components of the CDW order parameter, and associated domain walls. These results demonstrate the potential of ultrafast methods to induce topological defects through highly nonequilibrium dynamics. In (TaSe4)2I these defects should lead to exotic electronic states due to the nontrivial topology of the band structure. |
| format | Article |
| id | doaj-art-777e9e115ca948a2a8f9a406e55eefb4 |
| institution | Kabale University |
| issn | 2397-4648 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Materials |
| spelling | doaj-art-777e9e115ca948a2a8f9a406e55eefb42025-08-20T03:52:19ZengNature Portfolionpj Quantum Materials2397-46482025-04-011011710.1038/s41535-025-00762-7Coupled order parameters and photoinduced domain walls in the charge density wave of (TaSe4)2IRyan A. Duncan0Gal Orenstein1Soyeun Kim2Yijing Huang3Huaiyu Wang4Samuel W. Teitelbaum5Jade Stanton6Matthew Hurley7Alexander Miller8Nicholas Leonard9Dillon Hanlon10David A. Reis11Taito Osaka12Yuya Kubota13Tadashi Togashi14Kejian Qu15Daniel P. Shoemaker16Takahiro Sato17Mariano Trigo18Stanford PULSE Institute, SLAC National Accelerator LaboratoryStanford PULSE Institute, SLAC National Accelerator LaboratoryStanford PULSE Institute, SLAC National Accelerator LaboratoryStanford PULSE Institute, SLAC National Accelerator LaboratoryStanford PULSE Institute, SLAC National Accelerator LaboratoryDepartment of Physics, Arizona State UniversityDepartment of Physics, Arizona State UniversityDepartment of Physics, Arizona State UniversityDepartment of Physics, Arizona State UniversityDepartment of Physics, Arizona State UniversityDepartment of Physics, Arizona State UniversityStanford PULSE Institute, SLAC National Accelerator LaboratoryRIKEN SPring-8 CenterRIKEN SPring-8 CenterRIKEN SPring-8 CenterDepartment of Physics, University of Illinois at Urbana-ChampaignMaterials Research Laboratory, University of Illinois at Urbana-ChampaignLinac Coherent Light Source, SLAC National Accelerator LaboratoryStanford PULSE Institute, SLAC National Accelerator LaboratoryAbstract The charge density wave in (TaSe4)2I has drawn much attention recently as a controversial candidate for an axion insulator where the CDW breaks the chiral symmetry of the Weyl semimetal. Here we use ultrafast x-ray scattering to study the collective modes of this CDW. By measuring several diffraction peaks we find that the order parameter involves coupled optical and acoustic modes. For strong near-infrared excitation, the dynamics of the x-ray diffraction show evidence of photoinduced inversion of both components of the CDW order parameter, and associated domain walls. These results demonstrate the potential of ultrafast methods to induce topological defects through highly nonequilibrium dynamics. In (TaSe4)2I these defects should lead to exotic electronic states due to the nontrivial topology of the band structure.https://doi.org/10.1038/s41535-025-00762-7 |
| spellingShingle | Ryan A. Duncan Gal Orenstein Soyeun Kim Yijing Huang Huaiyu Wang Samuel W. Teitelbaum Jade Stanton Matthew Hurley Alexander Miller Nicholas Leonard Dillon Hanlon David A. Reis Taito Osaka Yuya Kubota Tadashi Togashi Kejian Qu Daniel P. Shoemaker Takahiro Sato Mariano Trigo Coupled order parameters and photoinduced domain walls in the charge density wave of (TaSe4)2I npj Quantum Materials |
| title | Coupled order parameters and photoinduced domain walls in the charge density wave of (TaSe4)2I |
| title_full | Coupled order parameters and photoinduced domain walls in the charge density wave of (TaSe4)2I |
| title_fullStr | Coupled order parameters and photoinduced domain walls in the charge density wave of (TaSe4)2I |
| title_full_unstemmed | Coupled order parameters and photoinduced domain walls in the charge density wave of (TaSe4)2I |
| title_short | Coupled order parameters and photoinduced domain walls in the charge density wave of (TaSe4)2I |
| title_sort | coupled order parameters and photoinduced domain walls in the charge density wave of tase4 2i |
| url | https://doi.org/10.1038/s41535-025-00762-7 |
| work_keys_str_mv | AT ryanaduncan coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT galorenstein coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT soyeunkim coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT yijinghuang coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT huaiyuwang coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT samuelwteitelbaum coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT jadestanton coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT matthewhurley coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT alexandermiller coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT nicholasleonard coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT dillonhanlon coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT davidareis coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT taitoosaka coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT yuyakubota coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT tadashitogashi coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT kejianqu coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT danielpshoemaker coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT takahirosato coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i AT marianotrigo coupledorderparametersandphotoinduceddomainwallsinthechargedensitywaveoftase42i |