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VIDEO DOI: https://doi.org/10.48448/3ks4-8193

technical paper

MMM 2022

November 07, 2022

Minneapolis, United States

Experimental study and first principles calculation of the spin Hall Effect in La0.67Sr0.33MnO3

In spintronics, the spin Hall effect is one of the most important mechanisms to generate and manipulate the spin current in an efficient way. Recent experimental study represented in 1 shows that anti-damping and the inverse spin Hall effect are observed simultaneously in the La0.67Sr0.33MnO3 (LSMO)/Pt heterostructure. Further, it has been observed that single layer LSMO films also exhibit significant amount of intrinsic spin Hall effect (ISHE) voltage (as seen in Fig. 1). Therefore, a series of LSMO films with varying thickness have been deposited via pulsed laser deposition technique to confirm the intrinsic ISHE in LSMO films. Polarity of measured voltage changes when we rotate our sample to 180 deg, which indicates the existence of intrinsic spin pumping in LSMO films.
In order to elucidate the physical origin of experimental observations, we compute the spin Hall conductivity of LSMO using first principles calculations. First, the ground state electronic structure of LSMO is calculated using density functional theory (DFT), as implemented in Quantum Espresso package. Using Wannier90, the system was interpolated into maximally-localized Wannier functions (MLWF) basis. Then we employ the Kubo formula to compute the spin Hall conductivity tensors of LSMO to assess the generation of spin current for a given electric field.


Transcript English (automatic)

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