6 citations · 19 across the 7 of their papers we have counts for
7 papers
Pair binding and Hund's rule breaking in high-symmetry fullerenes
R. Rausch, C. Karrasch
Highly-symmetric molecules often exhibit degenerate tight-binding states at the Fermi edge. This typically results in a magnetic ground state if small interactions are introduced i…
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…
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…
Investigating Stark many-body localization with continuous unitary transformation flows
Jan-Niklas Herre, Qiyu Liu, Roman Rausch +2
We investigate the ergodicity-to-localization transition in interacting fermion systems subjected to a spatially uniform electric field. For that we employ the recently proposed Te…
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…
Noncollinear phase of the antiferromagnetic sawtooth chain
R. Rausch, C. Karrasch
The antiferromagnetic sawtooth chain is a prototypical example of a frustrated spin system with vertex-sharing triangles, giving rise to complex quantum states. Depending on the in…
Magneto- and barocaloric properties of the ferro-antiferromagnetic sawtooth chain
N. Reichert, H. Schlüter, T. Heitmann +3
Materials that are susceptible to pressure and external magnetic fields allow the combined use of both for caloric processes. Here we report investigations of the ferromagnetic-ant…