Planar Hall Effect in Antiferromagnetic MnTe Thin Films

Yin, Gen; Yu, Jie-Xiang; Liu, Yizhou; Lake, Roger K.; Zang, Jiadong; Wang, Kang L.

doi:10.1103/physrevlett.122.106602

Title: Planar Hall Effect in Antiferromagnetic MnTe Thin Films

Journal Article · 13 March 2019 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.122.106602 · OSTI ID:1566696

Yin, Gen ^[1]; Yu, Jie-Xiang ^[2]; Liu, Yizhou ^[3]; Lake, Roger K. ^[4]; Zang, Jiadong ^[2]; Wang, Kang L. ^[5]

Univ. of California, Los Angeles, CA (United States). Dept. of Electrical and Computer Engineering
Univ. of New Hampshire, Durham, NH (United States). Dept. of Physics and Materials Science Program
Chinese Academy of Sciences (CAS), Beijing (China); Univ. of California, Riverside, CA (United States). Lab. for Terascale and Terahertz Electronics (LATTE), Dept. of Electrical and Computer Engineering
Univ. of California, Riverside, CA (United States). Lab. for Terascale and Terahertz Electronics (LATTE), Dept. of Electrical and Computer Engineering
Univ. of California, Los Angeles, CA (United States). Dept. of Electrical and Computer Engineering, and Dept. of Physics and Astronomy

We show that the spin-orbit coupling (SOC) in α-MnTe impacts the transport behavior by generating an anisotropic valence-band splitting, resulting in four spin-polarized pockets near Γ. A minimal k·p model is constructed to capture this splitting by group theory analysis, a tight-binding model, and ab initio calculations. The model is shown to describe the rotation symmetry of the zero-field planer Hall effect (PHE). The PHE originates from the band anisotropy given by SOC, and is quantitatively estimated to be 25%–31% for an ideal thin film with a single antiferromagnetic domain.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES); Univ. of California, Riverside, CA (United States); Univ. of New Hampshire, Durham, NH (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012670; SC0016424

OSTI ID:: 1566696

Alternate ID(s):: OSTI ID: 1546186

Journal Information:: Physical Review Letters, Vol. 122, Issue 10; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 23 works

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