title: Intrinsic low temperature paramagnetism in B-DNA.
abstract: We present an experimental study of magnetization in lambda-DNA in conjunction with structural measurements. The results show the surprising interplay between the molecular structures and their magnetic property. In the B-DNA state, lambda-DNA exhibits paramagnetic behavior below 20 K that is nonlinear in an applied magnetic field whereas, in the A-DNA state, it remains diamagnetic down to 2 K. We propose orbital paramagnetism as the origin of the observed phenomena and discuss its relation to the existence of long range coherent transport in B-DNA at low temperature.
authors.affiliation: Laboratoire de Matériaux et Phénomène Quantiques (UMR 7162), Université Paris 7-Denis-Diderot, Paris, France.
authors.forename: S
authors.initials: S
authors.lastname: Nakamae
authors.forename: M
authors.initials: M
authors.lastname: Cazayous
authors.forename: A
authors.initials: A
authors.lastname: Sacuto
authors.forename: P
authors.initials: P
authors.lastname: Monod
authors.forename: H
authors.initials: H
authors.lastname: Bouchiat
mesh_terms: D003080:Cold Temperature; D004247:DNA / Q000737:chemistry*; D004553:Electric Conductivity; D004563:Electrochemistry; D017711:Nonlinear Dynamics; D011827:Radiation; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water; D004247:DNA