Photoelectron spectra of alkali metal-ammonia microjets: From blue electrolyte to bronze metal

0525614 - ÚOCHB 2021 RIV US eng J - Článek v odborném periodiku
Buttersack, Tillmann - Mason, Philip E. - McMullen, R. S. - Schewe, H. C. - Martinek, Tomáš - Březina, Kryštof - Crhán, Martin - Gomez, Axel - Hein, D. - Wartner, G. - Seidel, R. - Ali, H. - Thürmer, S. - Maršálek, O. - Winter, B. - Bradforth, S. E. - Jungwirth, Pavel
Photoelectron spectra of alkali metal-ammonia microjets: From blue electrolyte to bronze metal.
Science. Roč. 368, č. 6495 (2020), s. 1086-1091. ISSN 0036-8075. E-ISSN 1095-9203
Grant CEP: GA MŠMT(CZ) EF16_019/0000729
Institucionální podpora: RVO:61388963
Klíčová slova: generalized gradient approximation * solvated electrons * nonmetal transition
Obor OECD: Physical chemistry
Impakt faktor: 47.728, rok: 2020
Způsob publikování: Omezený přístup
https://science.sciencemag.org/content/368/6495/1086

Experimental studies of the electronic structure of excess electrons in liquids—archetypal quantum solutes—have been largely restricted to very dilute electron concentrations. We overcame this limitation by applying soft x-ray photoelectron spectroscopy to characterize excess electrons originating from steadily increasing amounts of alkali metals dissolved in refrigerated liquid ammonia microjets. As concentration rises, a narrow peak at ~2 electron volts, corresponding to vertical photodetachment of localized solvated electrons and dielectrons, transforms continuously into a band with a sharp Fermi edge accompanied by a plasmon peak, characteristic of delocalized metallic electrons. Through our experimental approach combined with ab initio calculations of localized electrons and dielectrons, we obtain a clear picture of the energetics and density of states of the ammoniated electrons over the gradual transition from dilute blue electrolytes to concentrated bronze metallic solutions.
Trvalý link: http://hdl.handle.net/11104/0309720