Domain wall spin-texture in quantum Hall magnets
ORAL
Abstract
Recent experiments [Stepanov Petr, et al. Nature Physics 14.9,907; Wei et.al Science 362.229-233; Haoxin,arXiv:1904.11485] reported long range transport of spinful collective modes in single-layer graphene based quantum Hall magnets(QHMs), including transport across junctions between states with different Landau level filling factors. These experiments motivate a detailed study of the various junctions that can be formed between N=0 QHMs since the microscopic electronic and spin-texture structure near the junction influences the collective mode transmission rate. Using a self-consistent Hartree-Fock calculation, we show that the spin-textures around the junction of \nu=0 and \nu=\pm 1 QHMs are wide, reaching ~140nm at B=8T. For the junction of \nu=-1 and \nu=1 QHMs, however, the domain wall is narrower and the spin-texture depends on the sublattice potential. I will explain the microscopic physics that controls these junction properties.
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Presenters
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Nemin Wei
University of Texas at Austin
Authors
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Nemin Wei
University of Texas at Austin
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Chunli Huang
University of Texas at Austin
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Allan MacDonald
University of Texas at Austin, Physics, University of Texas at Austin, Department of Physics, University of Texas at Austin, Department of Physics, The University of Texas at Austin