Insulator-to-metal phase transition in Yb-based Kondo insulators

Abstract

The periodic Anderson lattice model for the crystalline electric field (CEF)split 4f quartet states is used to describe the Yb-based Kondo insulators/semiconductors. In the slave-boson mean-field approximation, we derive the hybridized quasiparticle bands, and find that decreasing the hybridization difference of the two CEF quartets may induce an insulator-to-metal phase transition. The resulting metallic phase has a hole and an electron Fermi pockets. Such a phase transition may be realized experimentally by applying pressure, reducing the difference in hybridization of the two CEF quartets.

5 pages, 3 figures

References in corpus (7)

• Magnetism, superconductivity, and pairing symmetry in Fe-based superconductors
• Field-induced Antiferromagnetism and the Kondo Insulator-to-Metal Transition
• Evidence for short-range antiferromagnetic fluctuations in Kondo-insulating YbB12
• Field-induced phase transitions in a Kondo insulator
• Theory of Spin Exciton in the Kondo Semiconductor $Yb{B}_{12}$
• Field induced magnetic ordering transition in Kondo insulators
• Theory for Magnetic Anisotropy of Field-Induced Insulator-to-Metal Transition in Cubic Kondo Insulator YbB_{12}