Lifetime of quasi-particles in the nearly-free electron metal Sodium

Autor:	Potorochin, D. V., Kurleto, R., Clark, O. J., Rienks, E. D. L., Sanchez-Barriga, J., Roth, F., Voroshnin, V., Fedorov, A., Eberhardt, W., Buechner, B., Fink, J.
Rok vydání:	2021
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.106.125138
Popis:	We report a high-resolution angle-resolved photoemission (ARPES) study of the prototypical nearly-free-electron metal sodium. The observed mass enhancement is slightly smaller than that derived in previous studies. The new results on the lifetime broadening increase the demand for theories beyond the random phase approximation. Our results do not support the proposed strong enhancement of the scattering rates of the charge carriers due to a coupling to spin fluctuations. Moreover, a comparison with earlier electron energy-loss data on sodium yields a strong reduction of the mass enhancement of dipolar electron-hole excitations compared to that of monopole hole excitations, measured by ARPES. Comment: 5 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2112.00422 Zobrazit plný text záznamu View this record from Arxiv