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cond-mat.stat-mech2019★ 25 cited
Spin functional renormalization group for quantum Heisenberg ferromagnets: Magnetization and magnon damping in two dimensions
Raphael Goll, Dmytro Tarasevych, Jan Krieg +1
We use the spin functional renormalization group recently developed by two of us [J. Krieg and P. Kopietz, Phys. Rev. B , 060403(R) (2019)] to calculate the magnetization…
cond-mat.stat-mech2017★ 27 cited
Dual lattice functional renormalization group for the Berezinskii-Kosterlitz-Thouless transition: irrelevance of amplitude and out-of-plane fluctuations
Jan Krieg, Peter Kopietz
We develop a new functional renormalization group (FRG) approach for the two-dimensional XY-model by combining the lattice FRG proposed by Machado and Dupuis [Phys. Rev. E 82, 0411…