Ultrafast magnetization induced by linearly polarized pulses is widespread in nonmagnetic semiconductors

Abstract

Ultrafast optical on-off switching of magnetic order promises near-petahertz information processing. Recently, it has been proposed that non-magnetic semiconductors with narrow band edges or strong exchange interactions could display ultrafast magnetization when photoexcited with linearly polarized femtoseconds pulses, but the experimental detection of this effect remains a challenge, mostly for the lack of suitable candidate compounds. Here, we present a high-throughput first-principles screening of the MC3D database of experimentally known inorganic crystals, identifying nearly 440 non-magnetic semiconductors that develop spin polarization under photoexcitation with linearly polarized pulses via a light-induced exchange-driven instability. We determine how the crystal field environment and band-edge orbital character govern the magnitude and the type of magnetic order of the photoinduced state and we unveil systematic chemical and periodic trends that provide intuitive guidance for materials selection. Our results argue that on-off switching of magnetization with linearly polarized femtosecond pulses is a widespread occurrence in non-magnetic semiconductors, opening novel avenues for experimental verification and application.