Multiple fermion scattering in the weakly coupled spin-chain compound YbAlO₃.

ABSTRACT: The Heisenberg antiferromagnetic spin-1/2 chain, originally introduced almost a century ago, is one of the best studied models in quantum mechanics due to its exact solution, but nevertheless it continues to present new discoveries. Its low-energy physics is described by the Tomonaga-Luttinger liquid of spinless fermions, similar to the conduction electrons in one-dimensional metals. In this work we investigate the Heisenberg spin-chain compound YbAlO₃ and show that the weak interchain coupling causes Umklapp scattering between the left- and right-moving fermions and stabilizes an incommensurate spin-density wave order at q = 2k_F under finite magnetic fields. These Umklapp processes open a route to multiple coherent scattering of fermions, which results in the formati

SUBMITTER: Nikitin SE 

PROVIDER: S-EPMC8203633 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature