Using a combination of neutron scattering, calorimetry, Quantum Monte Carlo (QMC) simulations and analytic results we uncover confinement effects in depleted, partially magnetized quantum spin ladders. We show that introducing non-magnetic impurities into magnetized spin ladders leads to the emergence of a new characteristic length L in the otherwise scale-free Tomonaga-Luttinger liquid (serving as the effective low-energy model). This results in universal LT scaling of staggered susceptibilities. Comparison of simulation results with experimental phase diagrams of prototypical spin ladder compounds DIMPY and BPCB yields excellent agreement.
@article{arxiv.2111.08464,
title = {LT-scaling in depleted quantum spin ladders},
author = {Stanislaw Galeski and Kirill Yu. Povarov and Dominic Blosser and Severian Gvasaliya and Rafal Wawrzynczak and Jacques Ollivier and Johannes Gooth and Andrey Zheludev},
journal= {arXiv preprint arXiv:2111.08464},
year = {2022}
}