Unconventional orbital charge density wave mechanism in the transition metal dichalcogenide 1T-TaS_{2}
The transition metal dichalcogenide 1T-TaS_{2} is attracting growing attention because of the formation of rich density wave (DW) and superconducting transitions. However, the origin of the incommensurate DW state at the highest temperature (∼550K), which is “the parent state” of the rich physical p...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2021-08-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.3.L032053 |
| _version_ | 1797210944569344000 |
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| author | Toru Hirata Youichi Yamakawa Seiichiro Onari Hiroshi Kontani |
| author_facet | Toru Hirata Youichi Yamakawa Seiichiro Onari Hiroshi Kontani |
| author_sort | Toru Hirata |
| collection | DOAJ |
| description | The transition metal dichalcogenide 1T-TaS_{2} is attracting growing attention because of the formation of rich density wave (DW) and superconducting transitions. However, the origin of the incommensurate DW state at the highest temperature (∼550K), which is “the parent state” of the rich physical phenomena, is still uncovered. Here, we present a natural explanation for the triple-q incommensurate DW in 1T-TaS_{2} based on the first-principles Hubbard model with on-site U. We apply the paramagnon interference mechanism that gives the nematic order in Fe-based superconductors. The derived order parameter has very unique characters: (i) an orbital-selective nature, and (ii) an unconventional sign reversal in both momentum and energy spaces. The present Letter will be useful for understanding the rich physics in 1T-TaS_{2}, 1T-VSe_{2}, and other transition metal dichalcogenides. |
| first_indexed | 2024-04-24T10:18:38Z |
| format | Article |
| id | doaj.art-9e4f257808df41f5a8daf416c829344d |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:18:38Z |
| publishDate | 2021-08-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-9e4f257808df41f5a8daf416c829344d2024-04-12T17:13:22ZengAmerican Physical SocietyPhysical Review Research2643-15642021-08-0133L03205310.1103/PhysRevResearch.3.L032053Unconventional orbital charge density wave mechanism in the transition metal dichalcogenide 1T-TaS_{2}Toru HirataYouichi YamakawaSeiichiro OnariHiroshi KontaniThe transition metal dichalcogenide 1T-TaS_{2} is attracting growing attention because of the formation of rich density wave (DW) and superconducting transitions. However, the origin of the incommensurate DW state at the highest temperature (∼550K), which is “the parent state” of the rich physical phenomena, is still uncovered. Here, we present a natural explanation for the triple-q incommensurate DW in 1T-TaS_{2} based on the first-principles Hubbard model with on-site U. We apply the paramagnon interference mechanism that gives the nematic order in Fe-based superconductors. The derived order parameter has very unique characters: (i) an orbital-selective nature, and (ii) an unconventional sign reversal in both momentum and energy spaces. The present Letter will be useful for understanding the rich physics in 1T-TaS_{2}, 1T-VSe_{2}, and other transition metal dichalcogenides.http://doi.org/10.1103/PhysRevResearch.3.L032053 |
| spellingShingle | Toru Hirata Youichi Yamakawa Seiichiro Onari Hiroshi Kontani Unconventional orbital charge density wave mechanism in the transition metal dichalcogenide 1T-TaS_{2} Physical Review Research |
| title | Unconventional orbital charge density wave mechanism in the transition metal dichalcogenide 1T-TaS_{2} |
| title_full | Unconventional orbital charge density wave mechanism in the transition metal dichalcogenide 1T-TaS_{2} |
| title_fullStr | Unconventional orbital charge density wave mechanism in the transition metal dichalcogenide 1T-TaS_{2} |
| title_full_unstemmed | Unconventional orbital charge density wave mechanism in the transition metal dichalcogenide 1T-TaS_{2} |
| title_short | Unconventional orbital charge density wave mechanism in the transition metal dichalcogenide 1T-TaS_{2} |
| title_sort | unconventional orbital charge density wave mechanism in the transition metal dichalcogenide 1t tas 2 |
| url | http://doi.org/10.1103/PhysRevResearch.3.L032053 |
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