Novel insulators with conducting edges

Article courtesy of the University of Zurich An international team including scientists at Princeton University is researching a new class of materials: higher-order topological insulators. The edges of these crystalline solids conduct electric current without dissipation, while the rest of the crystal remains insulating. These materials could be useful for applications in semiconductor technology and … Continue reading Novel insulators with conducting edges

Spotting the spin of the Majorana fermion under the microscope

By Catherine Zandonella, Office of the Dean for Research Researchers at Princeton University have detected a unique quantum property of an elusive particle notable for behaving simultaneously like matter and antimatter. The particle, known as the Majorana fermion, is prized by researchers for its potential to open the doors to new quantum computing possibilities. In … Continue reading Spotting the spin of the Majorana fermion under the microscope

Artificial topological matter opens new research directions

By Catherine Zandonella, Office of the Dean for Research An international team of researchers have created a new structure that allows the tuning of topological properties in such a way as to turn on or off these unique behaviors. The structure could open up possibilities for new explorations into the properties of topological states of … Continue reading Artificial topological matter opens new research directions

Theorists propose new class of topological metals with exotic electronic properties (Physics Review X)

By Tien Nguyen, Department of Chemistry Researchers at Princeton, Yale, and the University of Zurich have proposed a theory-based approach to characterize a class of metals that possess exotic electronic properties that could help scientists find other, similarly-endowed materials. Published in the journal Physical Review X, the study described a new class of metals based … Continue reading Theorists propose new class of topological metals with exotic electronic properties (Physics Review X)

Unconventional quasiparticles predicted in conventional crystals (Science)

By Staff An international team of researchers has predicted the existence of several previously unknown types of quantum particles in materials. The particles -- which belong to the class of particles known as fermions -- can be distinguished by several intrinsic properties, such as their responses to applied magnetic and electric fields. In several cases, … Continue reading Unconventional quasiparticles predicted in conventional crystals (Science)

Electrons slide through the hourglass on surface of bizarre material (Nature)

By Staff A team of researchers at Princeton University has predicted the existence of a new state of matter in which current flows only through a set of surface channels that resemble an hourglass. These channels are created through the action of a newly theorized particle, dubbed the "hourglass fermion," which arises due to a … Continue reading Electrons slide through the hourglass on surface of bizarre material (Nature)

Down the rabbit hole: how electrons travel through exotic new material (Science)

By Catherine Zandonella, Office of the Dean for Research Researchers at Princeton University have observed a bizarre behavior in a strange new crystal that could hold the key for future electronic technologies. Unlike most materials in which electrons travel on the surface, in these new materials the electrons sink into the depths of the crystal … Continue reading Down the rabbit hole: how electrons travel through exotic new material (Science)

‘Material universe’ yields surprising new particle (Nature)

By Staff An international team of researchers has predicted the existence of a new type of particle called the type-II Weyl fermion in metallic materials. When subjected to a magnetic field, the materials containing the particle act as insulators for current applied in some directions and as conductors for current applied in other directions. This … Continue reading ‘Material universe’ yields surprising new particle (Nature)

Long-sought chiral anomaly detected in crystalline material (Science)

By Catherine Zandonella, Office of the Dean for Research A study by Princeton researchers presents evidence for a long-sought phenomenon — first theorized in the 1960s and predicted to be found in crystals in 1983 — called the "chiral anomaly" in a metallic compound of sodium and bismuth. The additional finding of an increase in … Continue reading Long-sought chiral anomaly detected in crystalline material (Science)