TY - RPRT TI - Strong long-wavelength electron-phonon coupling in Ta 2 ⁢Ni⁡(Se,S) 5 AU - Kang, Zhibo [Yale University, New Haven, CT (United States)] (ORCID:0000000239278128) AU - Gurlek, Burak [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Center for Free-Electron Laser Science] (ORCID:0000000290388488) AU - Tang, Weichen [University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000219455369) AU - Chen, Xiang [University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000339978148) AU - Ruff, Jacob P. C. [Cornell University, Ithaca, NY (United States)] (ORCID:0000000227944795) AU - Alatas, Ahmet [Argonne National Laboratory (ANL), Argonne, IL (United States)] (ORCID:000000016521856X) AU - Said, Ayman H. [Argonne National Laboratory (ANL), Argonne, IL (United States)] (ORCID:0009000058228946) AU - Birgeneau, Robert J. [University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000311928333) AU - Louie, Steven G. [University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000306220170) AU - Rubio, Angel [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Center for Free-Electron Laser Science; Flatiron Institute, New York, NY (United States)] (ORCID:0000000320603151) AU - Latini, Simone [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Center for Free-Electron Laser Science; Technical University of Denmark, Lyngby (Denmark)] (ORCID:0000000195535259) AU - He, Yu [Yale University, New Haven, CT (United States)] (ORCID:0000000304254529) PY - 2026 DO - 10.1103/3wqb-7qq3 UR - https://www.osti.gov/biblio/3374413 ID - 3374413 ER -