Journal
PHYSICAL REVIEW B
Volume 97, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.97.104504
Keywords
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Funding
- HKRGC
- Croucher Foundation
- Dr. Tai-chin Lo Foundation [C6026-16W, 16303014, 16324216, 16307117]
- Croucher Innovation grant
- NSF-China [11574245]
- DOE [FG02-03 ER46076]
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Quantum anomalous Hall insulator/superconductor heterostructures emerged as a competitive platform to realize topological superconductors with chiral Majorana edge states as shown in recent experiments [He et al. Science 357, 294 (2017)]. However, chiral Majorana modes, being extended, cannot be used for topological quantum computation. In this work, we show that quasi-one-dimensional quantum anomalous Hall structures exhibit a large topological regime (much larger than the two-dimensional case) which supports localized Majorana zero energy modes. The non-Abelian properties of a cross-shaped quantum anomalous Hall junction is shown explicitly by time-dependent calculations. We believe that the proposed quasi-one-dimensional quantum anomalous Hall structures can be easily fabricated for scalable topological quantum computation.
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