Room-Temperature Superconductivity

Navy files for patent on room-temperature superconductor

February 22, 2019
by Troy Carter, TechLink


Illustration of the room-temperature superconductor design described in the U.S. Navy's patent application. Credit: U.S. Patent and Trademark Office

A scientist working for the U.S. Navy has filed for a patent on a room-temperature superconductor, representing a potential paradigm shift in energy transmission and computer systems.

Salvatore Cezar Pais is listed as the inventor on the Navy's patent applicationmade public by the U.S. Patent and Trademark Office on Thursday.
The application claims that a room-temperature superconductor can be built using a wire with an insulator core and an aluminum PZT (lead zirconate titanate) coating deposited by vacuum evaporation with a thickness of the London penetration depth and polarized after deposition.
An  is circumferentially positioned around the coating such that when the coil is activated with a pulsed current, a non-linear vibration is induced, enabling room temperature superconductivity.
"This concept enables the transmission of electrical power without any losses and exhibits optimal thermal management (no )," according to the patent document, "which leads to the design and development of novel energy generation and harvesting devices with enormous benefits to civilization."
No data was included in the patent documents.
A room-temperature superconductor is a material that is capable of exhibiting superconductivity at temperatures around 77 degrees Fahrenheit.
Current superconductors work when cooled near absolute zero, and the warmest superconductor, hydrogen sulfide, works at -95 degrees Fahrenheit.
Others have claimed to have invented a room-temperature superconductor in the past. Last year, two Indian scientists claimed to have made a room-temperature superconductor using particles of gold and silver. Other physicists are using pressurized lanthanum and hydrogen.


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Two independent studies report superconductivity at record high temperatures in hydrogen-rich materials under extreme pressure.

https://physics.aps.org/articles/v12/1



Evidence for Superconductivity above 260 K in Lanthanum Superhydride at Megabar Pressures

Maddury Somayazulu, Muhtar Ahart, Ajay K. Mishra, Zachary M. Geballe, Maria Baldini, Yue Meng, Viktor V. Struzhkin, and Russell J. Hemley
Phys. Rev. Lett. 122, 027001 (2019)
Published January 14, 2019



A. P. Drozdov, M. I. Eremets, I. A. Troyan, V. Ksenofontov, and S. I. Shylin, “Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system,” Nature 525, 73 (2015).
M. Somayazulu, M. Ahart, A. K. Mishra, Z. M. Geballe, M. Baldini, Y. Meng, V. V. Struzhkin, and R. J. Hemley, “Evidence for superconductivity above 260 K in lanthanum superhydride at megabar pressures,” Phys. Rev. Lett. 122, 027001 (2019).
A. P. Drozdov et al., “Superconductivity at 250 K in lanthanum hydride under high pressures,” arXiv:1812.01561.
N. W. Ashcroft, “Metallic hydrogen: A high-temperature superconductor?,” Phys. Rev. Lett. 21, 1748 (1968).

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