K-point longitudinal acoustic phonons are responsible for ultrafast intervalley scattering in monolayer MoSe2
Valley depolarization processes in 2D transition metal dichalcogenides have been linked to acoustic phonons, but optical verification is ambiguous, due to the nearly degenerate acoustic phonon frequencies at the zone-edge. Here, the authors determine the phonon momentum of the longitudinal acoustic...
| Main Authors: | , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-07-01
|
| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-022-32008-6 |
| _version_ | 1818018579776274432 |
|---|---|
| author | Soungmin Bae Kana Matsumoto Hannes Raebiger Ken-ichi Shudo Yong-Hoon Kim Ørjan Sele Handegård Tadaaki Nagao Masahiro Kitajima Yuji Sakai Xiang Zhang Robert Vajtai Pulickel Ajayan Junichiro Kono Jun Takeda Ikufumi Katayama |
| author_facet | Soungmin Bae Kana Matsumoto Hannes Raebiger Ken-ichi Shudo Yong-Hoon Kim Ørjan Sele Handegård Tadaaki Nagao Masahiro Kitajima Yuji Sakai Xiang Zhang Robert Vajtai Pulickel Ajayan Junichiro Kono Jun Takeda Ikufumi Katayama |
| author_sort | Soungmin Bae |
| collection | DOAJ |
| description | Valley depolarization processes in 2D transition metal dichalcogenides have been linked to acoustic phonons, but optical verification is ambiguous, due to the nearly degenerate acoustic phonon frequencies at the zone-edge. Here, the authors determine the phonon momentum of the longitudinal acoustic (LA) phonons at the K point as responsible for the ultrafast valley depolarization in monolayer MoSe2. |
| first_indexed | 2024-04-14T07:41:32Z |
| format | Article |
| id | doaj.art-98eab289bc1a44a8889598af8b353a6e |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-04-14T07:41:32Z |
| publishDate | 2022-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-98eab289bc1a44a8889598af8b353a6e2022-12-22T02:05:29ZengNature PortfolioNature Communications2041-17232022-07-011311810.1038/s41467-022-32008-6K-point longitudinal acoustic phonons are responsible for ultrafast intervalley scattering in monolayer MoSe2Soungmin Bae0Kana Matsumoto1Hannes Raebiger2Ken-ichi Shudo3Yong-Hoon Kim4Ørjan Sele Handegård5Tadaaki Nagao6Masahiro Kitajima7Yuji Sakai8Xiang Zhang9Robert Vajtai10Pulickel Ajayan11Junichiro Kono12Jun Takeda13Ikufumi Katayama14Laboratory for Materials and Structures, Tokyo Institute of TechnologyDepartment of Physics, Graduate School of Engineering Science, Yokohama National UniversityDepartment of Physics, Graduate School of Engineering Science, Yokohama National UniversityDepartment of Physics, Graduate School of Engineering Science, Yokohama National UniversitySchool of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST)International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)Department of Physics, Graduate School of Engineering Science, Yokohama National UniversityInstitute of Laser Engineering, Osaka UniversityDepartment of Materials Science and NanoEngineering, Rice UniversityDepartment of Materials Science and NanoEngineering, Rice UniversityDepartment of Materials Science and NanoEngineering, Rice UniversityDepartment of Materials Science and NanoEngineering, Rice UniversityDepartment of Physics, Graduate School of Engineering Science, Yokohama National UniversityDepartment of Physics, Graduate School of Engineering Science, Yokohama National UniversityValley depolarization processes in 2D transition metal dichalcogenides have been linked to acoustic phonons, but optical verification is ambiguous, due to the nearly degenerate acoustic phonon frequencies at the zone-edge. Here, the authors determine the phonon momentum of the longitudinal acoustic (LA) phonons at the K point as responsible for the ultrafast valley depolarization in monolayer MoSe2.https://doi.org/10.1038/s41467-022-32008-6 |
| spellingShingle | Soungmin Bae Kana Matsumoto Hannes Raebiger Ken-ichi Shudo Yong-Hoon Kim Ørjan Sele Handegård Tadaaki Nagao Masahiro Kitajima Yuji Sakai Xiang Zhang Robert Vajtai Pulickel Ajayan Junichiro Kono Jun Takeda Ikufumi Katayama K-point longitudinal acoustic phonons are responsible for ultrafast intervalley scattering in monolayer MoSe2 Nature Communications |
| title | K-point longitudinal acoustic phonons are responsible for ultrafast intervalley scattering in monolayer MoSe2 |
| title_full | K-point longitudinal acoustic phonons are responsible for ultrafast intervalley scattering in monolayer MoSe2 |
| title_fullStr | K-point longitudinal acoustic phonons are responsible for ultrafast intervalley scattering in monolayer MoSe2 |
| title_full_unstemmed | K-point longitudinal acoustic phonons are responsible for ultrafast intervalley scattering in monolayer MoSe2 |
| title_short | K-point longitudinal acoustic phonons are responsible for ultrafast intervalley scattering in monolayer MoSe2 |
| title_sort | k point longitudinal acoustic phonons are responsible for ultrafast intervalley scattering in monolayer mose2 |
| url | https://doi.org/10.1038/s41467-022-32008-6 |
| work_keys_str_mv | AT soungminbae kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT kanamatsumoto kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT hannesraebiger kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT kenichishudo kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT yonghoonkim kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT ørjanselehandegard kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT tadaakinagao kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT masahirokitajima kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT yujisakai kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT xiangzhang kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT robertvajtai kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT pulickelajayan kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT junichirokono kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT juntakeda kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 AT ikufumikatayama kpointlongitudinalacousticphononsareresponsibleforultrafastintervalleyscatteringinmonolayermose2 |