Weyl semimetal/insulator transition from holography
- 55 Downloads
We study a holographic model which exhibits a quantum phase transition from the strongly interacting Weyl semimetal phase to an insulating phase. In the holographic insulating phase there is a hard gap in the real part of frequency dependent diagonal conductivities. However, the anomalous Hall conductivity is nonzero at zero frequency, indicting that it is a Chern insulator. This holographic quantum phase transition is always of first order, signified by a discontinuous anomalous Hall conductivity at the phase transition, in contrast to the very continuous holographic Weyl semimetal/trivial semimetal phase transition. Our work reveals the novel phase structure of strongly interacting Weyl semimetal.
KeywordsHolography and condensed matter physics (AdS/CMT) Gauge-gravity correspondence
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
- A.A. Burkov, M.D. Hook and L. Balents, Topological nodal semimetals, Phys. Rev. B 84 (2011) 235126 [arXiv:1110.1089].
- J. Zaanen, Y.W. Sun, Y. Liu and K. Schalm, Holographic duality in condensed matter physics, Cambridge University Press, Cambridge U.K. (2015).Google Scholar
- M. Ammon and J. Erdmenger, Gauge/gravity duality: foundations and applications, Cambridge University Press, Cambridge U.K. (2015).Google Scholar
- C.Z. Chen et al., Disorder and metal-insulator transitions in Weyl semimetals, Phys. Rev. Lett. 115 (2015) 246603 [arXiv:1507.00128].
- L. Lu and Z. Wang, Topological one-way fiber of second Chern number, arXiv:1611.01998.