Kavli Affiliate: Daniel C. Ralph
| First 5 Authors: Rakshit Jain, Matthew Roddy, Vishakha Gupta, Benjamin Huang, Hasan M. Sayeed
| Summary:
Quantized anomalous Hall effects (QAHEs) occur in remarkable electronic
states which possess not only quantized Hall signals but in some cases regions
of dissipationless electron transport. The initial demonstrations of a QAHE in
a magnetically-doped topological insulator (TI) required temperatures below 100
mK, and since then a major focus of the field has been to increase the
temperature scale. Here, we report quantized Hall signals up to 10 K (in what
is known as the parity anomaly state) in TI/magnet bilayers made by mechanical
assembly, rather than by conventional deposition techniques. This is a factor
of 100 higher temperature than any previous realization of a QAHE in a
proximity-coupled TI/magnet heterostructure made by deposition, and
approximately twice the previous record for any QAHE system.
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