Precursor region with full phonon softening above the charge-density-wave phase transition in 2H-TaSe2
Abstract Research on charge-density-wave (CDW) ordered transition-metal dichalcogenides continues to unravel new states of quantum matter correlated to the intertwined lattice and electronic degrees of freedom. Here, we report an inelastic x-ray scattering investigation of the lattice dynamics of th...
| Main Authors: | , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-11-01
|
| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-43094-5 |
| _version_ | 1797630099861798912 |
|---|---|
| author | Xingchen Shen Rolf Heid Roland Hott Amir-Abbas Haghighirad Björn Salzmann Marli dos Reis Cantarino Claude Monney Ayman H. Said Mehdi Frachet Bridget Murphy Kai Rossnagel Stephan Rosenkranz Frank Weber |
| author_facet | Xingchen Shen Rolf Heid Roland Hott Amir-Abbas Haghighirad Björn Salzmann Marli dos Reis Cantarino Claude Monney Ayman H. Said Mehdi Frachet Bridget Murphy Kai Rossnagel Stephan Rosenkranz Frank Weber |
| author_sort | Xingchen Shen |
| collection | DOAJ |
| description | Abstract Research on charge-density-wave (CDW) ordered transition-metal dichalcogenides continues to unravel new states of quantum matter correlated to the intertwined lattice and electronic degrees of freedom. Here, we report an inelastic x-ray scattering investigation of the lattice dynamics of the canonical CDW compound 2H-TaSe2 complemented by angle-resolved photoemission spectroscopy and density functional perturbation theory. Our results rule out the formation of a central-peak without full phonon softening for the CDW transition in 2H-TaSe2 and provide evidence for a novel precursor region above the CDW transition temperature T CDW, which is characterized by an overdamped phonon mode and not detectable in our photoemission experiments. Thus, 2H-TaSe2 exhibits structural before electronic static order and emphasizes the important lattice contribution to CDW transitions. Our ab-initio calculations explain the interplay of electron-phonon coupling and Fermi surface topology triggering the CDW phase transition and predict that the CDW soft phonon mode promotes emergent superconductivity near the pressure-driven CDW quantum critical point. |
| first_indexed | 2024-03-11T11:03:12Z |
| format | Article |
| id | doaj.art-5c28c8e88fc1468583e02cbc72293732 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-11T11:03:12Z |
| publishDate | 2023-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-5c28c8e88fc1468583e02cbc722937322023-11-12T12:23:50ZengNature PortfolioNature Communications2041-17232023-11-0114111010.1038/s41467-023-43094-5Precursor region with full phonon softening above the charge-density-wave phase transition in 2H-TaSe2Xingchen Shen0Rolf Heid1Roland Hott2Amir-Abbas Haghighirad3Björn Salzmann4Marli dos Reis Cantarino5Claude Monney6Ayman H. Said7Mehdi Frachet8Bridget Murphy9Kai Rossnagel10Stephan Rosenkranz11Frank Weber12Institute for Quantum Materials and Technologies, Karlsruhe Institute of TechnologyInstitute for Quantum Materials and Technologies, Karlsruhe Institute of TechnologyInstitute for Quantum Materials and Technologies, Karlsruhe Institute of TechnologyInstitute for Quantum Materials and Technologies, Karlsruhe Institute of TechnologyDépartement de Physique and Fribourg Center for Nanomaterials, Université de FribourgDépartement de Physique and Fribourg Center for Nanomaterials, Université de FribourgDépartement de Physique and Fribourg Center for Nanomaterials, Université de FribourgAdvanced Photon Source, Argonne National LaboratoryInstitute for Quantum Materials and Technologies, Karlsruhe Institute of TechnologyInstitute of Experimental and Applied Physics and KiNSIS, Kiel UniversityInstitute of Experimental and Applied Physics and KiNSIS, Kiel UniversityMaterials Science Division, Argonne National LaboratoryInstitute for Quantum Materials and Technologies, Karlsruhe Institute of TechnologyAbstract Research on charge-density-wave (CDW) ordered transition-metal dichalcogenides continues to unravel new states of quantum matter correlated to the intertwined lattice and electronic degrees of freedom. Here, we report an inelastic x-ray scattering investigation of the lattice dynamics of the canonical CDW compound 2H-TaSe2 complemented by angle-resolved photoemission spectroscopy and density functional perturbation theory. Our results rule out the formation of a central-peak without full phonon softening for the CDW transition in 2H-TaSe2 and provide evidence for a novel precursor region above the CDW transition temperature T CDW, which is characterized by an overdamped phonon mode and not detectable in our photoemission experiments. Thus, 2H-TaSe2 exhibits structural before electronic static order and emphasizes the important lattice contribution to CDW transitions. Our ab-initio calculations explain the interplay of electron-phonon coupling and Fermi surface topology triggering the CDW phase transition and predict that the CDW soft phonon mode promotes emergent superconductivity near the pressure-driven CDW quantum critical point.https://doi.org/10.1038/s41467-023-43094-5 |
| spellingShingle | Xingchen Shen Rolf Heid Roland Hott Amir-Abbas Haghighirad Björn Salzmann Marli dos Reis Cantarino Claude Monney Ayman H. Said Mehdi Frachet Bridget Murphy Kai Rossnagel Stephan Rosenkranz Frank Weber Precursor region with full phonon softening above the charge-density-wave phase transition in 2H-TaSe2 Nature Communications |
| title | Precursor region with full phonon softening above the charge-density-wave phase transition in 2H-TaSe2 |
| title_full | Precursor region with full phonon softening above the charge-density-wave phase transition in 2H-TaSe2 |
| title_fullStr | Precursor region with full phonon softening above the charge-density-wave phase transition in 2H-TaSe2 |
| title_full_unstemmed | Precursor region with full phonon softening above the charge-density-wave phase transition in 2H-TaSe2 |
| title_short | Precursor region with full phonon softening above the charge-density-wave phase transition in 2H-TaSe2 |
| title_sort | precursor region with full phonon softening above the charge density wave phase transition in 2h tase2 |
| url | https://doi.org/10.1038/s41467-023-43094-5 |
| work_keys_str_mv | AT xingchenshen precursorregionwithfullphononsofteningabovethechargedensitywavephasetransitionin2htase2 AT rolfheid precursorregionwithfullphononsofteningabovethechargedensitywavephasetransitionin2htase2 AT rolandhott precursorregionwithfullphononsofteningabovethechargedensitywavephasetransitionin2htase2 AT amirabbashaghighirad precursorregionwithfullphononsofteningabovethechargedensitywavephasetransitionin2htase2 AT bjornsalzmann precursorregionwithfullphononsofteningabovethechargedensitywavephasetransitionin2htase2 AT marlidosreiscantarino precursorregionwithfullphononsofteningabovethechargedensitywavephasetransitionin2htase2 AT claudemonney precursorregionwithfullphononsofteningabovethechargedensitywavephasetransitionin2htase2 AT aymanhsaid precursorregionwithfullphononsofteningabovethechargedensitywavephasetransitionin2htase2 AT mehdifrachet precursorregionwithfullphononsofteningabovethechargedensitywavephasetransitionin2htase2 AT bridgetmurphy precursorregionwithfullphononsofteningabovethechargedensitywavephasetransitionin2htase2 AT kairossnagel precursorregionwithfullphononsofteningabovethechargedensitywavephasetransitionin2htase2 AT stephanrosenkranz precursorregionwithfullphononsofteningabovethechargedensitywavephasetransitionin2htase2 AT frankweber precursorregionwithfullphononsofteningabovethechargedensitywavephasetransitionin2htase2 |