One of the Korean researchers working on room temperature superconductors shows a sample with some possible magnetic locking effects. The phenomenon occurred when he found and cut out a part of the sample that was felt to have strong diamagnetism. He does not know if the effect can be explained by Lenz’s law. He thinks it is closer to flux spinning.
In July 2023, South Korean researchers published a paper claiming to have developed a room-temperature superconductor called LK-99. In March, 2024, professor Kim Hyun-tak of the College of William and Mary presented joint research on PCPOSOS, a material the researchers claim to be a room temperature and normal pressure superconductor. PCPOSOS is a material with more copper and sulfur in the chemistry than the original Lead apatite LK-99.
SCTL is another lab and company working with Kim Hyun-tak on the claimed room-temperature and room pressure superconductor material. The SCTL group has the new video showing a small sample with weak magnetic effects. The effects are weak because the samples are not pure materials. However, the effects are interesting as those who criticize the work have said that the samples are insulators or semiconductors. This demonstration is evidence that these are diamagnetic or superconducting materials. The suspension of the sample in a locked position that is not touching the regular magnets is not a normal effect for a regular copper metal beside a regular magnet.
Lenz’s law states that when the north pole of the bar magnet is approaching the coil, the induced current flows in such a way as to make the side of the coil nearest the pole of the bar magnet itself a north pole to oppose the approaching bar magnet. Upon withdrawing the bar magnet from the coil, the induced current reverses itself, and the near side of the coil becomes a south pole to produce an attracting force on the receding bar magnet.
Flux pinning is a phenomenon that occurs when flux vortices in a type-II superconductor are prevented from moving within the bulk of the superconductor, so that the magnetic field lines are “pinned” to those locations. The superconductor must be a type-II superconductor because type-I superconductors cannot be penetrated by magnetic fields Some type-I superconductors can experience the effects of flux pinning if they are thin enough. If the material’s thickness is comparable to the London penetration depth, the magnetic field can pass through the material. The act of magnetic penetration is what makes flux pinning possible. At higher magnetic fields (above lower critical field but below upper critical field ) the superconductor allows magnetic flux to enter in quantized packets surrounded by a superconducting current vortex
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The periodic extension via a crystalline lattice is the third step of the Claude E. Shannon model in which the encoded symbols (electrical charge-carrying bosons, an example being Cooper pairs) are transmitted over a noisy channel (the channel is the crystalline lattice of atoms and/or ions through which the charged bosons’ waves propagate with room temperature thermal motion being the noise). All particles have waves associated with them due to quantum mechanics’ fundamental tenet of wave-particle duality. Where any particle’s probability of being detected at a specific place and time is proportional to the square of the amplitude of the [complex] wave function there and then. Note that a wave function is indeed a function so it can be Fourier-analyzed into its frequency components. Some wave functions missing frequency components may be periodic and thus amenable to being extended by having multiple identical segments.
The electronic band model of how lasers work (yes, at room temperature and ambient pressure) is a guide to how room temperature superconductors can work — there is a metastable level where the electrons gather in very high density ready to be triggered to emit photon’s which are bosons.
For superconductor, we want lower energy flat band(s) where the charge-carrying bosons can gather by their being formed from a higher energy band where the fermions gather in very high density.
The first step of the Claude E. Shannon model can be achieved with the doping of a semiconductor or insulator.
The second step can be achieved with having a very flat energy band into which paired up fermions can fall from a higher energy band. Having flat energy bands allow the identical bosons to stay in the same energy band(s) without decoherence (with two identical bosons A and B, A colliding or interacting strongly with B producing B and A is indistinguishable because A is identical to B). The density of charged fermions in the higher energy band corralling them must be high.
The energies of the higher energy fermionic band and the lower energy bosonic band can be related by the adiabatic invariant equal to the ratio of the kinetic energy to the frequency.
A periodic crystalline lattice can extend a finite and short coherence length to arbitrarily long with periodic extension. This is the same way in which a Fourier series expansion of a Bloch wavefunction can have its frequency components extended to arbitrary length in multiple lengths.
Is it possible that the sulfur might be contaminated by selenium?
Does having selenium replacing sulfur work better to produce the magnetic effect?
The first superconductor discovered was mercury because it could be easily obtained in a very high level of PURITY.
Yeah, it looks as if we can indeed make a room-temperature micro-Mada-9 for a little flea to hug and ride a mountainous track of Fleeland at a slightly elevated distance from it !
Has it been determined whether it’s the copper or sulfur or both being required to be doped together to achieve the magnetic effect ? Can just copper as dopant alone work ? Can sulfur alone as dopant work ?
Yeah, it looks as if we can indeed make a room-temperature micro-Mada-9 for a little flea to hug and ride a mountainous track of Fleeland at a slight elevated distance from it !
Has it been determined whether it’s the copper or sulfur or both being required to be doped together to achieve the magnetic effect ? Can just copper as dopant alone work ? Can sulfur alone as dopant work ?
We’re so back!!!