Quantum Hall effects in a Weyl semimetal: Possible application in pyrochlore iridates

By Kai-Yu Yang, Yuan-Ming Lu, Ying Ran. 2011

577 citations recorded by the source corpus.

There have been lots of interest in pyrochlore Iridates A2Ir2O7 where both strong spin-orbital coupling and strong correlation are present. A recent LDA calculation suggests that the system is likely in a novel three dimensional topological semi-metallic phase: a Weyl semi-metal. Such a system has zero carrier density and arrives at the quantum limit even in a weak magnetic field. In this paper we discuss two novel quantum effects of this system in a magnetic field: a pressure-induced anomalous Hall effect and a magnetic field induced charge density wave at the pinned wavevector connecting Weyl nodes with opposite chiralities. A general formula of the anomalous hall coefficients in a Weyl semi-metal is also given. Both proposed effects can be probed by experiments in the near future, and can be used to detect the Weyl semi-metal phase.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics

View Paper: https://www.semanticscholar.org/paper/345a85dcf29957ecd471696baac25d518530198e

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

1. Ashvin Vishwanath
2. Shoucheng Zhang
3. Xiao-Liang Qi
4. Zhong Wang
5. N. P. Armitage
6. Ling Lu
7. E. Mele
8. Liang Fu

In Condensed Matter Physics

1. Ashvin Vishwanath
2. Shoucheng Zhang
3. Zhong Wang
4. Xiao-Liang Qi
5. Liang Fu
6. Ling Lu
7. N. P. Armitage
8. E. Mele

Citations in the corpus

• Experimental signatures of the chiral anomaly in Dirac–Weyl semimetals (2020, background): “Initially, the search for materials with protected 3D Dirac and Weyl states [1–5] focussed on the two symmetries, time-reversal invariance (TRI) and inversion symar X iv :2 01 0.”
• Nodal-link semimetals (2017, background): “[28] Kai-Yu Yang, Yuan-Ming Lu, and Ying Ran, “Quantum hall effects in a weyl semimetal: Possible application in pyrochlore iridates,” Phys.”
• Experimental observation of Weyl points (2015, background): “[14] Kai-Yu Yang, Yuan-Ming Lu, and Ying Ran, “Quantum hall effects in a weyl semimetal: Possible application in pyrochlore iridates,” Phys.”