🔬 condensed matter
Boundary phases and thermodynamics of the Kondo spin-s chain: from overscreened Kondo to boundary-bound states
This paper investigates a spin-1/2 impurity coupled to the boundary of an integrable spin-s Takhtajan-Babujian chain, revealing a rich phase diagram of boundary quantum phase transitions and bound states that reorganize the excitation spectrum, and provides a unified thermodynamic and dynamical description of these phenomena through a combination of boundary conformal field theory, exact Bethe Ansatz, generalized thermodynamic Bethe Ansatz, and tensor-network simulations.
Abay Zhakenov, Pradip Kattel, Andreas Gleis, Natan Andrei2026-08-14