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In-plane Magnetization Induced Quantum Anomalous Hall Effect | | Xin Liu
; Hsiu-Chuan Hsu
; Chao-Xing Liu
; | | Date: |
21 Jan 2013 | | Abstract: | In a two-dimensional electron gas, the quantized Hall conductance can be
induced by a strong magnetic field, known as the quantum Hall effect, and it
can also result from the strong exchange coupling of magnetic ions, dubbed as
the "quantum anomalous Hall effect". The quantum Hall effect requires the
out-of-plane magnetic field, and similarly, it is commonly believed that the
magnetization should be out-of-plane for the quantum anomalous Hall effect. In
the present work, we find this condition is not necessary and predict that the
quantum anomalous Hall effect can also be induced by the purely in-plane
magnetization in two realistic systems, including Bi$_2$Te$_3$ thin film with
magnetic doping and HgMnTe quantum wells with shear strains, when all the
reflection symmetries are broken. An experimental setup is proposed to confirm
this effect, the observation of which will pave the way to search for the
quantum anomalous Hall effect in a wider range of materials. | | Source: | arXiv, 1301.4772 | | Services: | Forum | Review | PDF | Favorites | |
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