News tagged with electrical resistivity

Tiny heat engine may be world's smallest

(PhysOrg.com) -- Steam engines, combustion engines, and diesel engines are all different types of heat engines, which operate by converting heat energy into mechanical work. Although heat engines have existed ...

Feb 02, 2011 feature
4.7 / 5 (29) 10 | with audio podcast

Roller coaster superconductivity discovered

Superconductors are more than 150 times more efficient at carrying electricity than copper wires. However, to attain the superconducting state, these materials have to be cooled below an extremely low, so-called ...

Aug 18, 2010
4.7 / 5 (26) 30 | with audio podcast

Giant atom eats quantum gas

A team of experimental and theoretical physicists from the University of Stuttgart studied a single micrometer sized atom. This atom contains tens of thousands of normal atoms in its electron orbital. These ...

Oct 31, 2013
4.4 / 5 (24) 2 | with audio podcast

Stanford physicists make new form of matter

(Phys.org) -- Within the exotic world of macroscopic quantum effects, where fluids flow uphill, wires conduct without electrical resistance and magnets levitate, there is an even stranger family of "unconventional" phenomena. ...

Jun 06, 2012
4.5 / 5 (21) 5 | with audio podcast

Superconductivity's third side unmasked

The debate over the mechanism that causes superconductivity in a class of materials called the pnictides has been settled by a research team from Japan and China. Superconductivity was discovered in the pnictides ...

Jun 17, 2011
4.8 / 5 (18) 42 | with audio podcast