Wave-particle energy exchange directly observed in a kinetic Alfvén-branch wave. - Gershman DJ; F-Viñas A; Dorelli JC; Boardsen SA; Avanov LA; Bellan PM; Schwartz SJ; Lavraud B; Coffey VN; Chandler MO; Saito Y; Paterson WR; et al. (Nature communications, 2017)