Severe Dirac Mass Gap Suppression in Sb<sub>2</sub>Te<sub>3</sub>-Based Quantum Anomalous Hall Materials
Severe Dirac Mass Gap Suppression in Sb<sub>2</sub>Te<sub>3</sub>-Based Quantum Anomalous Hall Materials
Quantum anomalous Hall (QAH) effect appears in ferromagnetic topological insulators (FMTI) when a Dirac mass gap opens in the spectrum of the topological surface states (SS). Unaccountably, although the mean mass gap can exceed 28 meV (or ~320 K), the QAH effect is frequently only detectable at temperatures below 1 …