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Proton conduction in KH2PO4 modified by proton irradiation

The proton conductivity of KH2PO4 (KDP) was modi ed by means of proton irradiation. Our neutron di raction and high-resolution 1H nuclear magnetic resonance measurements indicate that modi cation in the O O bond length in the KDP system induced by the proton-beam treatment is responsible for the change in the proton conduction, which is accompanied by a reduction in the proton-hopping activation energy.