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.