Interfacing oxide perovskites with antiperovskites could boost materials design and engineering

In a recent report, Camilo X. Quintela and an international group in materials science, physics and engineering in the U.S., Norway, China and South Korea proposed a novel direction for materials design based on nitride antiperovskite and oxide perovskite crystals.

Schematic representation of the crystal structures of M3XN nitride antiperovskite and ABO3 oxide perovskite compounds and their interfaces imageSchematic representation of the crystal structures of M3XN nitride antiperovskite and ABO3 oxide perovskite compounds and their interfaces. Image from Science Advances

In this work, they successfully layered perovskites and antiperovskites together, to create an interface with unique electrical properties for applications in a new class of quantum materials.

Perovskites combine with special organic molecules to advance spintronics and quantum computing

Scientists at the National Renewable Energy Laboratory and the University of Utah have shown that the transport of electrons with a particular spin state through a two-dimensional hybrid organic-inorganic perovskite can be manipulated by introducing special organic molecules in the multilayer structure. These are chiral, which means they prefer one electron helicity over the other. The new study may advance the field of spintronics—electronics that use the minuscule magnetic fields emanating from spinning electrons as well as the electric charges of the electrons themselves—for faster, smaller electronic devices that use less energy.

The Utah researchers worked together under the umbrella of the Center for Hybrid Organic Inorganic Semiconductors for Energy (CHOISE), an Energy Frontier Research Center funded by the U.S. Department of Energy’s Office of Science, Basic Energy Sciences.

Perovskites found promising as spintronics materials, researchers develop two new perovskite spintronics devices

Researchers from the University of Utah have developed two spintronics devices based on perovskite materials. The researchers used these new devices to demonstrate the high potential of perovksites for spintronics systems. This is a followup to the exciting results announced in 2017 by the same group that showed advantages of perovskites for spintronics.

Perovskite spintronics LED wavelength (Utah University)

The researchers used an organic-inorganic hybrid perovskite material with a heavy lead atom that features strong spin-orbit coupling and a long injected spin lifetime. The first device was a spintronic LED, which worked with a magnetic electrode instead of an electron-hole electrode. The perovskite LED lights up with circularly polarized electroluminescence.

Cornell team uses laser pulses to change the properties of a perovskite material

Researchers at Cornell used theoretical techniques to predict that using intense mid-infrared laser light on a titanium perovskite can dynamically induce a magnetic phase transition – taking the material from its ferromagnetic ground state to a hidden anti-ferromagnetic phase. This dramatic shift could have useful applications, particularly in optical information processing.

“It would be a kind of optical switch,” the researchers said. “You have a material where it’s magnetic and ‘non-magnetic.’ It’s going between those two states with light”.

Perovskite materials found to feature easily controlled electron spin and long spin lifetime

Researchers from the University of Utah discovered that organic-inorganic hybrid perovskites feature two contradictory properties - easily controlled electron spin and long spin lifetime (up to a nanosecond). This is a unique combination of two highly sought after properties for spintronics devices.

Hybrid organic-inorganic perovskite spintronics research (University of Utah)

The specific material used in this research is the hybrid perovskite methyl-ammonium lead iodine (CH3NH3PbI3). In their study, a thin film of this material was placed in front of an ultrafast laser that was used to set the electron's spin orientation and also observe the spin precession.