Observation of ferromagnetic phase in the second moiré band of twisted MoTe2
Abstract Flat bands and electron correlation in moiré lattices give rise to many exotic phases, including Mott insulators, superconductivity, and topological states. Within the first moiré band, integer and fractional quantum anomalous Hall effects have been observed in twisted bilayer MoTe2 (tMoTe2...
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-06-01
|
| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-59691-5 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850224375898308608 |
|---|---|
| author | Liheng An Haiyang Pan Wen-Xuan Qiu Naizhou Wang Shihao Ru Qinghai Tan Xuran Dai Xiangbin Cai Qiuyu Shang Xiufang Lu Hao Jiang Xiaodan Lyu Shunshun Yang Kenji Watanabe Takashi Taniguchi Fengcheng Wu Wei-bo Gao |
| author_facet | Liheng An Haiyang Pan Wen-Xuan Qiu Naizhou Wang Shihao Ru Qinghai Tan Xuran Dai Xiangbin Cai Qiuyu Shang Xiufang Lu Hao Jiang Xiaodan Lyu Shunshun Yang Kenji Watanabe Takashi Taniguchi Fengcheng Wu Wei-bo Gao |
| author_sort | Liheng An |
| collection | DOAJ |
| description | Abstract Flat bands and electron correlation in moiré lattices give rise to many exotic phases, including Mott insulators, superconductivity, and topological states. Within the first moiré band, integer and fractional quantum anomalous Hall effects have been observed in twisted bilayer MoTe2 (tMoTe2) at one hole doping and fractional doping per moiré unit cell, respectively. When the second moiré band is fully hole doped, quantum spin Hall insulator has also been reported in tMoTe2 at a certain twist angle. Exotic topological states together with ferromagnetic (FM) states in the high moiré band can potentially exist as well. In this study, we report the observation of a FM phase in the second moiré band in tMoTe2. The FM phase can be tuned by both the doping level and displacement field. At filling around 2.58 holes per moiré unit cell, the FM phase reaches a Curie temperature of 3.5 K. A large displacement field can suppress the FM phase, like the FM phase at the filling of −1. Our results demonstrate the realization of time-reversal symmetry-breaking states in the higher moiré bands in tMoTe2. |
| format | Article |
| id | doaj-art-ebb4aa731d494ae59f81c8b4a963f9c8 |
| institution | OA Journals |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-ebb4aa731d494ae59f81c8b4a963f9c82025-08-20T02:05:38ZengNature PortfolioNature Communications2041-17232025-06-011611710.1038/s41467-025-59691-5Observation of ferromagnetic phase in the second moiré band of twisted MoTe2Liheng An0Haiyang Pan1Wen-Xuan Qiu2Naizhou Wang3Shihao Ru4Qinghai Tan5Xuran Dai6Xiangbin Cai7Qiuyu Shang8Xiufang Lu9Hao Jiang10Xiaodan Lyu11Shunshun Yang12Kenji Watanabe13Takashi Taniguchi14Fengcheng Wu15Wei-bo Gao16Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological UniversityDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological UniversitySchool of Physics and Technology, Wuhan UniversityDepartment of Physics, School of Science and Research Center for Industries of the Future, Westlake UniversityDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological UniversitySchool of microelectronics, University of Science and Technology of ChinaDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological UniversityDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological UniversityDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological UniversityDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological UniversityDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological UniversityDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological UniversityDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological UniversityResearch Center for Electronic and Optical Materials, National Institute for Materials ScienceResearch Center for Materials Nanoarchitectonics, National Institute for Materials ScienceSchool of Physics and Technology, Wuhan UniversityDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological UniversityAbstract Flat bands and electron correlation in moiré lattices give rise to many exotic phases, including Mott insulators, superconductivity, and topological states. Within the first moiré band, integer and fractional quantum anomalous Hall effects have been observed in twisted bilayer MoTe2 (tMoTe2) at one hole doping and fractional doping per moiré unit cell, respectively. When the second moiré band is fully hole doped, quantum spin Hall insulator has also been reported in tMoTe2 at a certain twist angle. Exotic topological states together with ferromagnetic (FM) states in the high moiré band can potentially exist as well. In this study, we report the observation of a FM phase in the second moiré band in tMoTe2. The FM phase can be tuned by both the doping level and displacement field. At filling around 2.58 holes per moiré unit cell, the FM phase reaches a Curie temperature of 3.5 K. A large displacement field can suppress the FM phase, like the FM phase at the filling of −1. Our results demonstrate the realization of time-reversal symmetry-breaking states in the higher moiré bands in tMoTe2.https://doi.org/10.1038/s41467-025-59691-5 |
| spellingShingle | Liheng An Haiyang Pan Wen-Xuan Qiu Naizhou Wang Shihao Ru Qinghai Tan Xuran Dai Xiangbin Cai Qiuyu Shang Xiufang Lu Hao Jiang Xiaodan Lyu Shunshun Yang Kenji Watanabe Takashi Taniguchi Fengcheng Wu Wei-bo Gao Observation of ferromagnetic phase in the second moiré band of twisted MoTe2 Nature Communications |
| title | Observation of ferromagnetic phase in the second moiré band of twisted MoTe2 |
| title_full | Observation of ferromagnetic phase in the second moiré band of twisted MoTe2 |
| title_fullStr | Observation of ferromagnetic phase in the second moiré band of twisted MoTe2 |
| title_full_unstemmed | Observation of ferromagnetic phase in the second moiré band of twisted MoTe2 |
| title_short | Observation of ferromagnetic phase in the second moiré band of twisted MoTe2 |
| title_sort | observation of ferromagnetic phase in the second moire band of twisted mote2 |
| url | https://doi.org/10.1038/s41467-025-59691-5 |
| work_keys_str_mv | AT lihengan observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT haiyangpan observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT wenxuanqiu observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT naizhouwang observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT shihaoru observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT qinghaitan observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT xurandai observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT xiangbincai observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT qiuyushang observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT xiufanglu observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT haojiang observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT xiaodanlyu observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT shunshunyang observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT kenjiwatanabe observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT takashitaniguchi observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT fengchengwu observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 AT weibogao observationofferromagneticphaseinthesecondmoirebandoftwistedmote2 |