The Radial Dependence of Proton-scale Magnetic Spectral Break in Slow Solar Wind during PSP Encounter 2 - Duan,D; Bowen,TA; Chen,CHK; Mallet,A; He,J; Bale,SD; Vech,D; Kasper,JC; Pulupa,M; Bonnell,JW; Case,AW; de,Wit TD; et al. (ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2020)