Topological and magnetic phases of interacting electrons in the pyrochlore iridates
By W. Witczak-Krempa, Yong Baek Kim. 2011
216 citations recorded by the source corpus.
We construct a model for interacting electrons with strong spin-orbit coupling in the pyrochlore iridates. We establish the importance of the direct hopping process between the Ir atoms, and use the relative strength of the direct and indirect hopping as a generic tuning parameter to study the correlation effects across the iridates family. We predict quantum phase transitions between conventional and/or topologically nontrivial phases. At weak coupling, we find topological insulator and metallic phases. As one increases the interaction strength, various magnetic orders emerge. The topological Weyl semimetal phase is found to be realized in these different orders, one of them being the all-in/all-out pattern. Our findings establish the possible magnetic ground states for the iridates and suggest the generic presence of the Weyl semimetal phase in correlated magnetic insulators on the pyrochlore lattice. We discuss the implications for existing and future experiments.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/5584a6d1c37f7eb47b93dc0b456a4eca9f77ceab
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In Atomic and Molecular Physics, and Optics
In Condensed Matter Physics
In Materials Chemistry
- Ashvin Vishwanath
- Xiao-Liang Qi
- N. P. Armitage
- E. Mele
- D. Pesin
- P. Hosur
- Shoucheng Zhang
- Masatoshi Sato
Citations in the corpus
- Probing the chiral anomaly with nonlocal transport in three dimensional topological semimetals (2013, background): “[43] W.”
- Recent developments in transport phenomena in Weyl semimetals (2013, background): “In the last couple of years, there has been growing interest in a seemingly close cousin of graphene – the socalled Weyl semimetal (WSM) (Wan et al. [38], Witczak-Krempa and Kim [42], Chen and Hermele [6], Turner and Vishwanath [33], Vafek and Vishwanath [35], Volovik [37], Heikkila et al. [15]).”
- Weyl and Dirac semimetals in three-dimensional solids (2017, background): “In a crystal with cubic symmetry, where T breaking Weyl nodes may appear as proposed in the pyrochlore iridates (Wan et al., 2011; Wang et al., 2017; Witczak-Krempa and Kim, 2012), symmetry enforces vanishing of the anomalous Hall effect, due to the absence of a preferred axis.”