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June 04, 2008

New iron based superconductors show need for new theoretical models


New iron based superconductors will require new models and theories for superconductivity.

Results clearly indicate a nodeless gap order parameter, which is nearly isotropic in size across different sections of the Fermi surface, and are not compatible with models involving antiferromagnetic fluctuations, strong correlations, the t-J model, and the like, originally designed for the high-Tc copper oxides.


A Johns Hopkins University research article, offers insights into why the characteristics of a new family of iron-based superconductors reveal the need for fresh theoretical models which could, they say, pave the way for the development of superconductors that can operate at room temperature.

It appears to us that the new iron-based superconductors disclose a new physics, contain new mysteries and may start us along an uncharted pathway to room temperature superconductivity. "If superconductors could exist at room temperatures, the world energy crisis would be solved," Tingyong Chen said. [Chia-Ling Chien was the lead author]


The new iron based superconductors also have interesting behavior around 137-155 degrees kelvin.

FURTHER READING
Material Research Science and Engineering Center at The Johns Hopkins University.

How would room temperature superconductors help solve the worlds energy problems ?

Room temperature superconductors would help reduce power losses to transmitting electricity, generating and storing electricity. Superconducting power generation and engines are more efficient. Engines could be made smaller. This would mean less power lost to moving engines that were many times heavier.



Currently 55% of the electricity generated in the USA is lost to distribution and generation inefficiency.

A room temperature superconducting engine would also be very efficient and several times lighter.

Energy losses in a car are big, but to more fully help with that you need to put the engine in the wheels.


Here is an illustration of power losses in current cars

2 comments:

Jonathan said...

"If superconductors could exist at room temperatures, the world energy crisis would be solved"

And how would this solve all of our energy problems?

bw said...

That was a quote from one of the researchers.

How room temperature superconductors would help would no power loss transmission and storage of electricity. Far more efficient power generation and engines. Engines could be made smaller.

currently 55% of the electricity generated in the USA is lost to distribution and generation inefficiency.

a room temperature superconducting engine would also be very efficient and several times lighter.

energy losses in a car are big, but to more fully help with that you need to put the engine in the wheels.

http://farm2.static.flickr.com/1219/1150442746_15d108e33c.jpg