TY - RPRT TI - Intrinsic emittance properties of an Fe-doped β-Ga 2 O 3 (010) photocathode: Ultracold electron emission at 300 K and the polaron self-energy AU - Angeloni, Louis A. [University of Illinois, Chicago, IL (United States)] (ORCID:0000000325458168) AU - Shan, Ir-Jene [University of Illinois, Chicago, IL (United States)] (ORCID:0000000319295593) AU - Leach, J. H. [Kyma Technologies Inc., Raleigh, NC (United States)] (ORCID:0000000157575655) AU - Schroeder, W. Andreas [University of Illinois, Chicago, IL (United States)] (ORCID:0000000213768401) PY - 2026 DO - 10.1063/5.0309595 UR - https://www.osti.gov/biblio/3429339 ID - 3429339 ER -