Superconductivity in Copper Oxide



Superconductors conduct electricity Without resistance when cooled to a certain temperature, called critical temperature. They are used in power grids, maglev trains and medical imaging. High temperature super- conductors have critical temperatures higher than regular superconductors. They have huge potential in advancing superconductor technology. Research has shown the mechanisms involved in their superconductivity is not fully understood. 

Copper oxides are  called cuprates. They are classified high temperature super conductors. Electrons and holes ( Space Left behind by electrons) are instituted into their unique crystal structure through a process called doping. 

In a low doped state, With less electrons introduced for superconductivity, A pseudo gap is formed. This is a slight gap in the electron structure. This gap is considered the origin of superconductivity In these materials. Previous studies have observed a long range charge density wave (CDW). It appears in the low doped cuprates And it breaks up the crystal symmetry of the copper oxide. 

CDW is a  repeating wave pattern Of electrons that disrupts the material’s conductivity. Breaking of the symmetry has been known to arise inside or near symmetry broken states. It has been shown that very strong magnetic fields can induce a long range symmetry breaking CDW. The exact role of this occurrence of super conductivity in cuprates is still being studied. 

There is a new approach from Shinji Kawasaki and the department of physics at Okayama University in Japan. They are Investigating the origin of high temperature superconductivity in the gap state of cuprates. 

Professor Kawasaki reports “In the study, we have discovered the existence of a long range CDW order in the optimally doped Bi2201, Induced by tensile compressive strain Applied by a novel,  Piezo driven uni-axial strain Cell , which deliberately breaks the crystal symmetry of the copper oxide plane.”

The findings republished mid June in Nature Communications. 

Researchers used nuclear magnetic resonance To study changes in the structure of the doped Bi2201 Superconductor , tensile strains were applied. The material changed, with short range CDW order transitioning Into long range CDW order. These results suggest that a hidden long range CDW order, not limited to low doped materials exists in the gap state of cuprates.  It is visible when the material is placed under strain. 

“This Finding challenges the conventional belief that magnetism is the primary driver in copper oxide and provides valuable insights for constructing theoretical models of superconductivity,” reports Professor Kawasaki. 

Overall, the study is a huge step forward. The understanding of high temperature superconductivity and highlighting the significance of uniaxial Strain is important in the understanding of future superconductors. 

Comments

Post a Comment

Popular posts from this blog

Mike Giradi from Stereotimes commentary on Holostage Room Treatments

I have been  friends with Mike Giradi for a few years and he has helped me test numerous designs .    I was so honored a few weeks ago when he agreed to give these Holostages a few words.  From. Mike G. The sound was a little closed in at first, but then it really opened up to prove it is another great audio product. The noise floor is greatly reduced. I am hearing details I've never heard before. When it's in the recording, the soundstage widens in all directions. The timbre of each instrument is spot on. The six Holostages installed in my room aided in the C13 alignment of air molecules to a far greater extent than the Bybee IQSE devices I had previously been using. Every instrument had greater depth, pop and presence. Listening to classical music on movie soundtracks is incredible now. The Holostages installed on my BACCH4MAC and monoblocks was the answer to what was needed. The noise floor dropped significantly in both cases resulting in greater clarity and music...
Read more

Queen Bee 🐝

Image
  Bees hide an interesting secret. When the hive loses its queen, who alone is able to give life to the colony and maintain order in a perfectly organized society, all seems lost. The life of the hive slows down. Without new eggs, the future is lost. In a few weeks, the colony may be doomed. But the bees do not panic. Nor do they expect salvation from outside. Demonstrating extraordinary collective intelligence and profound instincts, they trigger spectacular emergency procedures, almost unimaginable in a world dominated by insects. --- ◆ The transformation begins with a simple but essential choice The worker bees choose common larvae - those who would normally be mere workers. They are nothing special. They are not born different. But their fate changes completely. They are chosen to receive a special food: royal jelly. A rare substance, produced by healthy bees, rich in proteins, vitamins and bioactive compounds. This is royal food in the purest sense of the word. The larvae fed ...
Read more

Novel Acoustic Wave Discovered

Image
  A new diffraction phenomenon was researched and published on January 14, 2025. The team was led by Tohoku University with collaboration from the Japan atomic energy agency and the RIKEN Center for emergent matter science. Surface acoustic waves (SAWs) are elastic vibrations. They travel along the surface of materials, not unlike ripples on a pond. SAWs are an important part of frequency filters used in every day devices like our cell phones. These devices change electrical signals in vibrations, or ripples. This occurs because of the piezoelectric  effect and it enables efficient signal processing. During this experiment, the team created a periodic array of magnetic nanoscale materials. The magnetic array is a sort of specialized grating that the waves passed through. The scientists were surprised. Instead of the usual symmetric defraction, the team saw something different. They observed a completely new, asymmetrical diffraction of SAWs called ‘non-reciprocal defraction’....
Read more