3 papers
cond-mat.str-el2025
Relaxation dynamics of a quantum spin coupled to a topological edge state
Qiyu Liu, Christoph Karrasch, Dante Marvin Kennes +1
A classical impurity spin coupled to the spinful Su-Schrieffer-Heeger (SSH) chain is known to exhibit complex switching dynamics with incomplete spin relaxation. Here, we study the…
cond-mat.str-el2024
Persistent Haldane Phase in Carbon Tetris Chains
Anas Abdelwahab, Christoph Karrasch, Roman Rausch
We introduce the concept of tetris chains, which are linear arrays of 4-site molecules that differ by their intermolecular hopping geometry. We investigate the fermionic symmetry-p…
cond-mat.str-el2024
Atacamite CuCl(OH) in High Magnetic Fields: Quantum Criticality and Dimensional Reduction of a Sawtooth-Chain Compound
L. Heinze, T. Kotte, R. Rausch +13
We report an extensive high-field study of atacamite CuCl(OH), a material realization of quantum sawtooth chains with weak interchain couplings, in continuous and pulsed ma…