2023
DOI: 10.1088/1361-648x/acdbf8
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Fingerprint of parity anomaly for localized magnetic states in quantum anomalous Hall systems

Abstract: We investigate the local magnetic states of impurities in quantum anomalous Hall (QAH) systems and observe that with an increasing band gap, the magnetic region of impurities expands in the QAH phase, while it contracts in the ordinary insulator (OI) phase. During the transition between the QAH and the OI phase, the magnetization area undergoes a significant transformation from a broad region to a narrow strip, which serves as a distinctive characteristic of the parity anomaly in the localized magnetic states.… Show more

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