4 papers
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…
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…
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…