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.
@article{arxiv.cond-mat/0504474,
title = {Intrinsic Low Temperature Paramagnetism in B-DNA},
author = {S. Nakamae and M. Cazayous and A. Sacuto and P. Monod and H. Bouchiat},
journal= {arXiv preprint arXiv:cond-mat/0504474},
year = {2009}
}
Comments
5 pages, 4 figures, submitted to Physical Review Letters October 2004