Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 158, Issue 6, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0136807
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This paper focuses on the electrical and magnetic properties of a thin film cleaved from the nonmagnetic half-Heusler compound CoTiSb. Through first-principles calculations, it is found that the surface of TiSb termination possesses ferrimagnetism, which can be tuned to nonmagnetism by gate-induced hole doping. This magnetic tunability provides a platform for realizing a pseudo-spin valve without hetero-interfaces.
The electrical manipulation of magnetization is appealing to the relevant experiment and spintronic device. In this paper, we focus on the electrical and magnetic properties of a thin film cleaved from the nonmagnetic half-Heusler compound CoTiSb. By means of the first-principles calculations, we find that the surface of TiSb termination possesses ferrimagnetism with a magnetic moment of 0.35 (0.49) mu(B) per unit cell without (with) Hubbard U, which can persist below the Curie temperature of 48 (54) K. What is more, such a surface magnetism can be tuned to nonmagnetism by gate-induced hole doping with a concentration of 2.83 x 10(14) (3.55 x 10(14)) cm(-2). This magnetic tunability of the CoTiSb slab provides a platform to realize the pseudo-spin valve with both the magnetic electrodes and nonmagnetic space layer made of the same material without hetero-interfaces.
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