14 papers
Field-induced states and thermodynamics of the frustrated Heisenberg antiferromagnet on a square lattice
Andreas Honecker, M. E. Zhitomirsky, Alexander Wietek +1
We investigate the ground-state and finite-temperature properties of the - Heisenberg antiferromagnet on the square lattice in the presence of an external magnetic field.…
Electronic Green's function across the pseudogap to stripe transition in the -- model
Martin Ulaga, Aritra Sinha, Alexander Wietek
Superconducting domes in strongly correlated electronic systems are often accompanied by charge density waves and peculiar features in the electronic structure. The appearance of a…
Incommensurate Spin-Density Waves in a Frustrated Maple-Leaf Lattice Ferromagnet
Paul L. Ebert, Yasir Iqbal, Alexander Wietek
We study how ferromagnetism breaks down in the spin- nearest-neighbor Heisenberg model on the maple-leaf lattice with ferromagnetic and antiferromagnetic ,…
Thermodynamics of the Heisenberg antiferromagnet on the maple-leaf lattice
Robin Schäfer, Paul L. Ebert, Noah Hassan +3
We study the Heisenberg antiferromagnet on the maple-leaf lattice using several numerical approaches, focusing on the numerical linked-cluster expansion (NLCE), which exhibits an u…
Evolution of superconductivity from charge clusters to stripes in the -- model
Aritra Sinha, Hannes Karlsson, Martin Ulaga +1
Competition and coexistence of charge orders and superconductivity are hallmarks in many strongly correlated electron systems. Here, we unravel the precise role of charge fluctuati…
XDiag: Exact Diagonalization for Quantum Many-Body Systems
Alexander Wietek, Luke Staszewski, Martin Ulaga +6
Exact diagonalization (ED) is a cornerstone technique in quantum many-body physics, enabling precise solutions to the Schrödinger equation for interacting quantum systems. Despite…