Spin transport in quantum Hall magnets
ORAL
Abstract
Recent nonlocal electrical measurements [Stepanov Petr, et al. Nature Physics 14.9, 907; Wei et.al Science 362, 229-233; Haoxin et.al ,arXiv:1904.11485] have revealed remarkable spin transport properties in devices that host various graphene quantum Hall magnet (QHM) states. I will discuss our efforts to understand several different aspects of these experiments: 1) using an electric circuit model, we provide an explanation for the finite range of bias voltages over which nonlocal voltages are observed across insulating magnetic states and 2) using a microscopic spin-wave theory we estimate the transmission probabilities of magnon-like collective modes across junctions between QHMs that have different Landau level filling factors.
–
Presenters
-
Chunli Huang
University of Texas at Austin
Authors
-
Chunli Huang
University of Texas at Austin
-
Nemin Wei
University of Texas at Austin
-
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