New step towards future complex oxide electronics

22.11. 2017 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

Researchers from TU Delft, Cornell University and the University of Cagliari report an interesting method for turning a highly insulating material into a highly conducting system. The process involves combining three different metal oxides in a sharp interface. They have recently published their findings in ACS Applied Materials & Interfaces.

‘Brazil nut effect’ helps explain how rivers resist erosion, team finds

21.11. 2017 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

Pop the top off a can of mixed nuts and, chances are, Brazil nuts will be at the top. This phenomenon, of large particles tending to rise to the top of mixtures while small particles tend to sink down, is popularly known as the "Brazil nut effect" and more technically as granular segregation.

Missing link between new topological phases of matter discovered

18.10. 2017 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

Physicists at BESSY II have investigated a class of materials that exhibit characteristics of topological insulators. During these studies, they discovered a transition between two different topological phases, one of which is ferroelectric, meaning a phase in the material that exhibits spontaneous electric polarisation and can be reversed by an external electric field. This could also lead to new applications such as switching between differing conductivities.

Uncovering the connection between negative stiffness and magnetic domain walls

14.07. 2017 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

Nature doesn't like having interfaces—this is why bubbles like to be round, and the surface of a pond settles to flat as long as it's not disturbed. These trends minimize the total amount of interface (or surface) that is present. As an exception to this behavior, certain materials are known to have a property, called negative stiffness, where the interface prefers to become distorted, or wavy, even without any external stimulation.

A functional prototype nonvolatile ferroelectric domain wall memory

26.06. 2017 Condensed Matter News - Physics News, Physic Materials News, Physics, Materials

(Phys.org)—A team of researchers from institutions in Australia, the U.S. and China has developed a functional prototype nonvolatile ferroelectric domain wall memory. In their paper published on the open access site Science Advances, the group describes their prototype, its properties and how well it worked.