6 papers
SU(2) gauge theory of fluctuating stripe order in the two-dimensional Hubbard model
Henrik Müller-Groeling, Pietro M. Bonetti, Paulo Forni +1
We present an SU(2) gauge theory of fluctuating stripe order in the two-dimensional Hubbard model. The theory is based on a fractionalization of the electron operators in fermionic…
Spin susceptibility in a pseudogap state with fluctuating spiral magnetic order
Paulo Forni, Pietro M. Bonetti, Henrik Müller-Groeling +2
We compute the electron spin susceptibility in the pseudogap regime of the two-dimensional Hubbard model in the framework of a SU(2) gauge theory of fluctuating magnetic order. The…
Spin stiffnesses and stability of magnetic order in the lightly doped two-dimensional Hubbard model
Demetrio Vilardi, Pietro M. Bonetti, Walter Metzner
We analyze the density dependence of the spin stiffnesses and the stability of magnetic order with respect to quantum fluctuations in the two-dimensional Hubbard model close to hal…
Collective mode spectroscopy in time-reversal symmetry breaking superconductors
Silvia Neri, Walter Metzner, Dirk Manske
Time-reversal symmetry breaking (TRSB) superconductors show a rich collective mode spectrum. In general, collective excitations in superconductors can provide crucial information o…
Spiral to stripe transition in the two-dimensional Hubbard model
Robin Scholle, Walter Metzner, Demetrio Vilardi +1
We obtain an almost complete understanding of the mean-field phase diagram of the two-dimensional Hubbard model on a square lattice with a sizable next-nearest neighbor hopping and…
Marginal Fermi liquid behavior at the onset of density wave order in two-dimensional metals with flat hot spots
Lukas Debbeler, Walter Metzner
We analyze quantum fluctuation effects at the onset of incommensurate charge- or spin-density wave order in two-dimensional metals, for a model where the ordering wave vecto…