Quantum anomalous Hall effect (QAHE) is the "quantum" version of the anomalous Hall effect. While the anomalous Hall effect requires a combination of magnetic polarization and spin-orbit coupling to generate a finite Hall voltage even in the absence of an external magnetic field (hence called "anomalous"), the quantum anomalous Hall effect is its quantized version. The Hall conductivity acquires quantized values proportional to integer multiples of the von Klitzing constant () (also called conductance quantum). In this respect the QAHE is similar to the quantum Hall effect. The integer here is equal to the Chern number which arises out of topological properties of the material band structure. These effects are observed in systems called quantum anomalous Hall insulators (also called Chern insulators).[1]
quantum, anomalous, hall, effect, qahe, quantum, version, anomalous, hall, effect, while, anomalous, hall, effect, requires, combination, magnetic, polarization, spin, orbit, coupling, generate, finite, hall, voltage, even, absence, external, magnetic, field, . Quantum anomalous Hall effect QAHE is the quantum version of the anomalous Hall effect While the anomalous Hall effect requires a combination of magnetic polarization and spin orbit coupling to generate a finite Hall voltage even in the absence of an external magnetic field hence called anomalous the quantum anomalous Hall effect is its quantized version The Hall conductivity acquires quantized values proportional to integer multiples of the von Klitzing constant e 2 h displaystyle e 2 h also called conductance quantum In this respect the QAHE is similar to the quantum Hall effect The integer here is equal to the Chern number which arises out of topological properties of the material band structure These effects are observed in systems called quantum anomalous Hall insulators also called Chern insulators 1 The effect was observed experimentally for the first time in 2013 by a team led by Xue Qikun at Tsinghua University 2 See also editQuantum Hall effect Hall effectReferences edit Liu Chao Xing Zhang Shou Cheng Qi Xiao Liang 2015 08 28 The quantum anomalous Hall effect arXiv 1508 07106 cond mat mes hall Chang Cui Zu Zhang Jinsong Feng Xiao Shen Jie Zhang Zuocheng Guo Minghua Li Kang Ou Yunbo Wei Pang 2013 04 12 Experimental Observation of the quantum Anomalous Hall Effect in a Magnetic Topological Insulator Science 340 6129 167 170 arXiv 1605 08829 Bibcode 2013Sci 340 167C doi 10 1126 science 1234414 ISSN 0036 8075 PMID 23493424 S2CID 29455044 nbsp This quantum mechanics related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Quantum anomalous Hall effect amp oldid 1114255889, wikipedia, wiki, book, books, library,
