@article{12724,
  keywords = {spectroscopy, Condensed Matter Physics, Instrumentation, Radiation},
  author = {Yingchao Zhang and Xun Shi and Mengxue Guan and Wenjing You and Yigui Zhong and Tika Kafle and Yaobo Huang and Hong Ding and Michael Bauer and Kai Rossnagel and Sheng Meng and Henry Kapteyn and Margaret Murnane},
  title = {Creation of a novel inverted charge density wave state},
  abstract = {<p>Charge density wave (CDW) order is an emergent quantum phase that is characterized by periodic lattice distortion and charge density modulation, often present near superconducting transitions. Here, we uncover a novel inverted CDW state by using a femtosecond laser to coherently reverse the star-of-David lattice distortion in 1<i>T</i>-TaSe<sub>2</sub>. We track the signature of this novel CDW state using time- and angle-resolved photoemission spectroscopy and the time-dependent density functional theory to validate that it is associated with a unique lattice and charge arrangement never before realized. The dynamic electronic structure further reveals its novel properties that are characterized by an increased density of states near the Fermi level, high metallicity, and altered electron–phonon couplings. Our results demonstrate how ultrafast lasers can be used to create unique states in materials by manipulating charge-lattice orders and couplings.</p>
},
  year = {2022},
  journal = {Structural Dynamics},
  volume = {9},
  pages = {014501},
  month = {2022-01},
  publisher = {AIP Publishing},
  issn = {2329-7778},
  doi = {10.1063/4.0000132},
}