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6 papers · 2 filters
Spectral properties of strongly correlated multi impurity models in the Kondo insulator regime: Emergent coherence, metallic surface states and quantum phase transitions
Fabian Eickhoff, Frithjof B. Anders
We investigate the real-space spectral properties of strongly-correlated multi-impurity arrays in the Kondo insulator regime. Employing a recently developed mapping onto an effecti…
Ultrafast Optical Control of Magnetic Order and Fermi Surface Topology at a Quantum Critical Point
Benedikt Fauseweh, Jian-Xin Zhu
Designing material properties on demand has important implications to potential future technological applications. While theoretically it is always possible to tune various intrins…
Neutron diffraction of field-induced magnon condensation in the spin-dimerized antiferromagnet SrCrO
Alsu Gazizulina, Diana Lucia Quintero-Castro, Zhe Wang +11
In this work, we investigate the evolution and settling of magnon condensation in the spin-1/2 dimer system SrCrO using a combination of magnetostriction in pulse…
Charge dynamics in magnetically disordered Mott insulators
Philip Bleicker, Dag-Björn Hering, Götz S. Uhrig
With the aid of both a semi-analytical and a numerically exact method we investigate the charge dynamics in the vicinity of half-filling in the one- and two-dimensional - mod…
Kondo holes in strongly correlated impurity arrays: RKKY driven Kondo screening and hole-hole interactions
Fabian Eickhoff, Frithjof B. Anders
The emerging and screening of local magnetic moments in solids has been investigated for more than 60 years. Local vacancies as in graphene or in Heavy Fermions can induce decouple…
Revealing three-dimensional quantum criticality by Sr-substitution in Han Purple
Stephan Allenspach, Pascal Puphal, Joosep Link +20
Classical and quantum phase transitions (QPTs), with their accompanying concepts of criticality and universality, are a cornerstone of statistical thermodynamics. An exemplary cont…