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4 papers · 1 filter
Constraint Effective Potential of the Staggered Magnetization in an Antiferromagnet
U. Gerber, C. P. Hofmann, F. -J. Jiang +2
We employ an improved estimator to calculate the constraint effective potential of the staggered magnetization in the spin quantum Heisenberg model using a loop-clus…
Spiral phases and two-particle bound states from a systematic low-energy effective theory for magnons, electrons, and holes in an antiferromagnet
C. Brügger, C. P. Hofmann, F. Kämpfer +3
We have constructed a systematic low-energy effective theory for hole- and electron-doped antiferromagnets, where holes reside in momentum space pockets centered at $(\pm\fracπ{2a}…
Systematic Low-Energy Effective Field Theory for Electron-Doped Antiferromagnets
C. Brügger, C. P. Hofmann, F. Kämpfer +3
In contrast to hole-doped systems which have hole pockets centered at , in lightly electron-doped antiferromagnets the charged quasiparticles resid…
Homogeneous versus Spiral Phases of Hole-doped Antiferromagnets: A Systematic Effective Field Theory Investigation
C. Brügger, C. P. Hofmann, F. Kämpfer +2
Using the low-energy effective field theory for magnons and holes -- the condensed matter analog of baryon chiral perturbation theory for pions and nucleons in QCD -- we study diff…