title: Orientational defects in ice Ih: an interpretation of electrical conductivity measurements.
abstract: We present a first-principles study of the structure and energetics of Bjerrum defects in ice Ih and compare the results to experimental electrical conductivity data. While the DFT result for the activation energy is in good agreement with experiment, we find that its two components have quite different values. Aside from providing new insight into the fundamental parameters of the microscopic electrical theory of ice, our results suggest the activity of traps in doped ice in the temperature regime typically assumed to be controlled by the free migration of L defects.
authors.affiliation: Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Unicamp, 13083-970 Campinas, São Paulo, Brazil.
authors.forename: Maurice
authors.initials: M
authors.lastname: de Koning
authors.forename: Alex
authors.initials: A
authors.lastname: Antonelli
authors.forename: Antonio J R
authors.initials: AJ
authors.lastname: da Silva
authors.forename: A
authors.initials: A
authors.lastname: Fazzio