Yong-Soo Jho, Ki-Seok Kim
We uncover that long-range interactions give rise to perfect metallicity (zero resistivity) at zero temperature in Weyl metals when electric fields are applied to the direction of the momentum vector to connect two paired Weyl points. Performing the renormalization group analysis, we find that the distance between two Weyl points becomes enhanced logarithmically at low temperatures although the coupling constant of such interactions vanishes inverse-logarithmically. Considering the Adler-Bell-Jackiw anomaly, scattering between these two Weyl points becomes suppressed to increase electrical conductivity in the "longitudinal" direction, counter-intuitive in the respect that interactions are expected to reduce metallicity. Correlations with topological constraints allow unexpected and exotic transport properties.
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http://arxiv.org/abs/1301.1436
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