Intrinsic Low Temperature Paramagnetism in B-DNA
arXiv:cond-mat/0504474 · doi:10.1103/PhysRevLett.94.248102
Abstract
We present experimental study of magnetization in $λ$-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, $λ$-DNA exhibits paramagnetic behaviour below 20 K that is non-linear in applied magnetic field whereas in the A-DNA state, 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.
5 pages, 4 figures, submitted to Physical Review Letters October 2004