### News

#### DMI modulation with current.

The DMI increases with increasing current with a rate that agrees with what is predicted by the model based on the spin Doppler effect.

The results imply that the interfacial DMI may partly originate from equilibrium spin current which can be modulated externally.

Current induced modulation of interfacial Dzyaloshinskii-Moriya interaction

N. Kato, M. Kawaguchi, Y.-C. Lau, T. Kikuchi, Y. Nakatani, M. Hayashi

Phys. Rev. Lett. 122, 257205 (2019).

#### A giant acoustic planar Hall effect observed.

The sign of the field angle dependent transverse voltage does not depend on the SAW propagation direction but its size is more than an order of magnitude larger than its electronic counterpart (i.e. planar Hall effect).

These results imply that acoustic current can generate magneto-galvanic effects similar to the electric and thermo-electric currents but the effect can be significantly larger.

Unidirectional planar Hall voltages induced by surface acoustic waves in ferromagnetic thin films

T. Kawada, M. Kawaguchi, M. Hayashi

Phys. Rev. B 99, 184435 (2019).

#### Studies on the DMI and spin orbit torque at the Ir/Co interface published.

The sign of the Ir/Co DMI is the same with that of the Pt/Co interface.

Ir has small a spin Hall angle of 0.01 but acts as a good spin sink, which can be exploited for engineering spin orbit torque in spin orbit heterostructures.

Dzyaloshinskii-Moriya interaction and spin-orbit torque at the Ir/Co interface

Y. Ishikuro, M. Kawaguchi, N. Kato, Y.-C. Lau, M. Hayashi

Phys. Rev. B 99, 134421 (2019).

#### Our paper on the spin Hall effect in Co-Ga alloy is published.

First principle calculations show that hybridization of the Co 3d and Ga 4p orbitals contribute to the large spin Hall effect in this alloy.

Spin Hall effect from 3d-4p hybridized orbitals

Y.-C. Lau, H. Lee, G. Qu, K. Nakamura, M. Hayashi

Phys. Rev. B 99, 064410 (2019).

#### Hana Hirose won the JSAP young scientist presentation award!

Presentation title: "Material dependence of interfacial spin-momentum locked bands in metallic heterostructures."

Congratulations!

#### Our paper was selected as a featured article!

H. Hirose, N. Ito, M. Kawaguchi, Y. C. Lau, M. Hayashi

Appl. Phys. Lett. 113, 222404 (2018).

See also Scilight for more information.

#### Spin orbit induced photocurrent found in Bi/Cu bilayer.

The effect can arise from a spin momentum locked band at the Cu/Bi interface.

Circular photogalvanic effect in Cu/Bi bilayers

H. Hirose, N. Ito, M. Kawaguchi, Y. C. Lau, M. Hayashi

Appl. Phys. Lett. 113, 222404 (2018).

#### Spin orbit torque detected optically!

Optical Detection of Spin-Orbit Torque and Current-Induced Heating

Y. Marui, M. Kawaguchi, M. Hayashi

Appl. Phys. Express 11, 5 093001 (2018).

#### Hana Hirose won the Best presentation award!

Congratulations!

#### Our paper on the resistance of chiral domain walls is published.

Domain-Wall Resistance in Cofeb-Based Heterostructures with Interface Dzyaloshinskii-Moriya Interaction

Y. Ishikuro, M. Kawaguchi, Y. C. Lau, Y. Nakatani, M. Hayashi

Appl. Phys. Express 11, 5 073001 (2018).

#### Our paper on the spin Hall magnetoresistance in Pt/Co bilayers is published.

Anomalous Spin Hall Magnetoresistance in Pt/Co Bilayers

M. Kawaguchi, D. Towa, Y. C. Lau, S. Takahashi, M. Hayashi

Appl. Phys. Lett. 112, 5 202405 (2018).