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We demonstrate the dissipationless transport of the chiral edge state (CES)in the nanodevices of quantum anomalous Hall insulator candidate MnBi2Te4. Thedevice presents a near-zero longitudinal resistance together with a quantizedHall plateau in excess of 0.97 h/e2 over a range of temperatures from very lowup to the Neel temperature of 22 K. Each of four-probe nonlocal measurementsgives near-zero resistance and two-probe measurements exhibit a plateau of +1h/e2, while the results of three-probe nonlocal measurements depend on themagnetic field. This indicates non-dissipation as well as the chirality of theedge state. The CES shows three regimes of temperature dependence, i.e.,well-preserved dissipationless transport below 6 K, variable range hoppingwhile increasing the temperature and thermal activation at higher than 22 K.Even at the lowest temperature, a current of over 1.4 {\mu}A breaks thedissipationless transport. These form a complete set of evidences of the Cherninsulator state in the MnBi2Te4 systems.

Experimental evidence on the dissipationless transport of chiral edge state of the high-field Chern insulator in MnBi2Te4 nanodevices