In: Nature Physics, 2020, p. -
Nd2Ir2O7 is a correlated semimetal with the pyrochlore structure, in which competing spin–orbit coupling and electron–electron interactions are believed to induce a time- reversal symmetry-broken Weyl semimetal phase characterized by pairs of topologically protected Dirac points at the Fermi energy1,2,3,4. However, the emergent properties in these materials are far from clear, and exotic...
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In: Journal of Physics: Condensed Matter, 2019, vol. 31, no. 32, p. 323001
The pyrochlore oxides A2B2O7 exhibit a complex interplay between geometrical frustration, electronic correlations, and spin–orbit coupling (SOC), due to the lattice structure and active charge, spin, and orbital degrees of freedom. Understanding the properties of these materials is a theoretical challenge, because their intricate nature depends on material-specific details and quantum...
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In: Physical Review B, 2019, vol. 99, no. 11, p. 115132
The Sachdev-Ye-Kitaev (SYK) model describes a strange metal that shows peculiar non-Fermi-liquid properties without quasiparticles. It exhibits a maximally chaotic behavior characterized by out-of-time-ordered correlators (OTOCs), and is expected to be a holographic dual to black holes. While a faithful realization of the SYK model in condensed-matter systems may be involved, a striking...
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In: Physical Review B, 2019, vol. 99, no. 8, p. 085131
We study ordered phases with broken translational symmetry in the half-filled three- orbital Hubbard model with antiferromagnetic Hund coupling by means of dynamical mean-field theory (DMFT) and continuous-time quantum Monte Carlo simulations. The stability regions of the antiferro-orbital (AFO), antiferromagnetic (AFM), and charge density wave (CDW) states are determined by measuring the...
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In: EPL (Europhysics Letters), 2018, vol. 124, no. 5, p. 57002
Spin-freezing is the origin of bad-metal physics and non-Fermi liquid (non-FL) properties in a broad range of correlated compounds. In a multi-orbital lattice system with Hund coupling, doping of the half-filled Mott insulator results in a highly incoherent metal with frozen magnetic moments. These moments fluctuate and collapse in a crossover region that is characterized by unusual non-Fermi...
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In: The European Physical Journal Special Topics, 2013, vol. 217, no. 1, p. 121-133
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In: The European Physical Journal B - Condensed Matter and Complex Systems, 2006, vol. 54, no. 4, p. 435-448
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In: The European Physical Journal B, 2007, vol. 57, no. 4, p. 385-390
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In: The European Physical Journal B - Condensed Matter and Complex Systems, 2006, vol. 53, no. 2, p. 213-217
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In: Communications in Mathematical Physics, 2008, vol. 280, no. 3, p. 807-829
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