Creation of a novel inverted charge density wave state
| Autor: | Yingchao Zhang, Xun Shi, Mengxue Guan, Wenjing You, Yigui Zhong, Tika R. Kafle, Yaobo Huang, Hong Ding, Michael Bauer, Kai Rossnagel, Sheng Meng, Henry C. Kapteyn, Margaret M. Murnane |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Condensed Matter - Materials Science
Radiation Strongly Correlated Electrons (cond-mat.str-el) Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology Articles 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Condensed Matter - Strongly Correlated Electrons 0103 physical sciences Condensed Matter::Strongly Correlated Electrons ddc:500 010306 general physics 0210 nano-technology Instrumentation Materials Spectroscopy |
| Zdroj: | Structural Dynamics Structural dynamics 9(1), 014501 (2022). doi:10.1063/4.0000132 |
| DOI: | 10.1063/4.0000132 |
| Popis: | Structural dynamics 9(1), 014501 (2022). doi:10.1063/4.0000132 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 1T-TaSe2. 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.INTRODUCTION Published by AIP Publishing LLC, Melville, NY |
| Databáze: | OpenAIRE |
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