title: Vibration induced electric dipole in a weakly bound molecular complex.
abstract: A strong electric susceptibility is measured as a function of temperature in a molecular dimer which is weakly bound by a pair of hydrogen bonds. This system is a remarkable example where the dominant term in the susceptibility is due to a vibration induced electric dipole. As a consequence, the averaged square of the dipole moment varies linearly with the temperature and the susceptibility does not follow the usual 1/T Curie law. this spectacular effect demonstrates the importance of dynamics to interpret the properties of weakly bound complexes.
authors.affiliation: Laboratoire de Spectrométrie Ionique et Moléculaire, UMR No. 5579, CNRS et Université Lyon 1, 43 bd du 11 novembre 1918, 69622 Villeurbanne CEDEX, France.
authors.forename: I
authors.initials: I
authors.lastname: Compagnon
authors.forename: R
authors.initials: R
authors.lastname: Antoine
authors.forename: D
authors.initials: D
authors.lastname: Rayane
authors.forename: M
authors.initials: M
authors.lastname: Broyer
authors.forename: Ph
authors.initials: P
authors.lastname: Dugourd