{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Luo W"],"funding":["Boston University","Office of Science","National Science Foundation"],"pagination":["482-489"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9706783"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["2(6)"],"pubmed_abstract":["The group-10 noble-metal dichalcogenides have recently emerged as a promising group of two-dimensional materials due to their unique crystal structures and fascinating physical properties. In this work, the resonance enhancement of the interlayer breathing mode (B1) and intralayer A<sub>g</sub> <sup>1</sup> and A<sub>g</sub> <sup>3</sup> modes in atomically thin pentagonal PdSe<sub>2</sub> were studied using angle-resolved polarized Raman spectroscopy with 13 excitation wavelengths. Under the excitation energies of 2.33, 2.38, and 2.41 eV, the Raman intensities of both the low-frequency breathing mode B1 and high-frequency mode A<sub>g</sub> <sup>1</sup> of all the thicknesses are the strongest when the incident polarization is parallel to the <i>a</i> axis of PdSe<sub>2</sub>, serving as a fast identification of the crystal orientation of few-layer PdSe<sub>2</sub>. We demonstrated that the intensities of B1, A<sub>g</sub> <sup>1</sup>, and A<sub>g</sub> <sup>3</sup> modes are the strongest with the excitation energies between 2.18 and 2.38 eV when the incident polarization is parallel to PdSe<sub>2</sub> <i>a</i> axis, which arises from the resonance enhancement caused by the absorption. Our investigation reveals the underlying interplay of the anisotropic electron-phonon and electron-photon interactions in the Raman scattering process of atomically thin PdSe<sub>2</sub>. It paves the way for future applications on PdSe<sub>2</sub>-based optoelectronics."],"journal":["ACS physical chemistry Au"],"pubmed_title":["Excitation-Dependent Anisotropic Raman Response of Atomically Thin Pentagonal PdSe<sub>2</sub>."],"pmcid":["PMC9706783"],"funding_grant_id":["DE-AC05-00OR22725","1945364"],"pubmed_authors":["Mao N","Xiao K","Ling X","Luo W","Liang L","Oyedele AD","Puretzky A"],"additional_accession":[]},"is_claimable":false,"name":"Excitation-Dependent Anisotropic Raman Response of Atomically Thin Pentagonal PdSe<sub>2</sub>.","description":"The group-10 noble-metal dichalcogenides have recently emerged as a promising group of two-dimensional materials due to their unique crystal structures and fascinating physical properties. In this work, the resonance enhancement of the interlayer breathing mode (B1) and intralayer A<sub>g</sub> <sup>1</sup> and A<sub>g</sub> <sup>3</sup> modes in atomically thin pentagonal PdSe<sub>2</sub> were studied using angle-resolved polarized Raman spectroscopy with 13 excitation wavelengths. Under the excitation energies of 2.33, 2.38, and 2.41 eV, the Raman intensities of both the low-frequency breathing mode B1 and high-frequency mode A<sub>g</sub> <sup>1</sup> of all the thicknesses are the strongest when the incident polarization is parallel to the <i>a</i> axis of PdSe<sub>2</sub>, serving as a fast identification of the crystal orientation of few-layer PdSe<sub>2</sub>. We demonstrated that the intensities of B1, A<sub>g</sub> <sup>1</sup>, and A<sub>g</sub> <sup>3</sup> modes are the strongest with the excitation energies between 2.18 and 2.38 eV when the incident polarization is parallel to PdSe<sub>2</sub> <i>a</i> axis, which arises from the resonance enhancement caused by the absorption. Our investigation reveals the underlying interplay of the anisotropic electron-phonon and electron-photon interactions in the Raman scattering process of atomically thin PdSe<sub>2</sub>. It paves the way for future applications on PdSe<sub>2</sub>-based optoelectronics.","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 Nov","modification":"2026-03-27T16:13:04.058Z","creation":"2025-02-19T04:34:06.09Z"},"accession":"S-EPMC9706783","cross_references":{"pubmed":["36465836"],"doi":["10.1021/acsphyschemau.2c00007"]}}