Abstract
We address the fundamental role of electronic and vibrational interactions on the magnetization of the homogeneous and randomly sequenced DNA. We find several important magnetic properties of DNA: the intrastrand electron-electron interaction enhances magnetization, while the interstrand interaction suppresses it. Renormalization of the hopping integrals due to electron-vibration interactions results in a paramagnetic to diamagnetic transition as a function of temperature. The influence of interelectron interactions is therefore to transform the diamagnetic system into a paramagnetic one while the temperature can reverse that behavior. Being entirely intrinsic, these properties would not be influenced by the environment.
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