TY  - JOUR
AU  - Choi, Young-Gwan
AU  - Jo, Daegeun
AU  - Ko, Kyung-Hun
AU  - Go, Dongwook
AU  - Kim, Kyung-Han
AU  - Park, Hee Gyum
AU  - Kim, Changyoung
AU  - Min, Byoung-Chul
AU  - Choi, Gyung-Min
AU  - Lee, Hyun-Woo
TI  - Observation of the orbital Hall effect in a light metal Ti
JO  - Nature 
VL  - 619
IS  - 7968
SN  - 0028-0836
CY  - London [u.a.]
PB  - Nature Publ. Group
M1  - FZJ-2023-02639
SP  - 52 - 56
PY  - 2023
AB  - The orbital Hall effect1 refers to the generation of electron orbital angular momentum flow transverse to an external electric field. Contrary to the common belief that the orbital angular momentum is quenched in solids, theoretical studies2,3 predict that the orbital Hall effect can be strong and is a fundamental origin of the spin Hall effect4,5,6,7 in many transition metals. Despite the growing circumstantial evidence8,9,10,11, its direct detection remains elusive. Here we report the magneto-optical observation of the orbital Hall effect in the light metal titanium (Ti). The Kerr rotation by the orbital magnetic moment accumulated at Ti surfaces owing to the orbital Hall current is measured, and the result agrees with theoretical calculations semi-quantitatively and is supported by the orbital torque12 measurement in Ti-based magnetic heterostructures. This result confirms the orbital Hall effect and indicates that the orbital angular momentum is an important dynamic degree of freedom in solids. Moreover, this calls for renewed studies of the orbital effect on other degrees of freedom such as spin2,3,13,14, valley15,16, phonon17,18,19 and magnon20,21 dynamics.
LB  - PUB:(DE-HGF)16
C6  - 37407680
UR  - <Go to ISI:>//WOS:001024763800012
DO  - DOI:10.1038/s41586-023-06101-9
UR  - https://juser.fz-juelich.de/record/1009108
ER  -