Kim Hyun-tak (lead original south korean researcher) has a confident email to a colleague.
We [Original Korean Superconducting Researchers] designate March 4, 2024 as The Day of Room Temperature Superconductor (TDRTS) and researchers celebrate the day with delicious food. This is because it is the day when room-temperature superconductivity, such as magnetic levitation and zero resistance, is proven at the conference.
🧵Thread on the talk:
1) at the beginning Dr. Hyun-Tak Kim also mentioned other collaborators, see slide. https://t.co/mfMk8bCFg6 pic.twitter.com/jmGfjTQUVC
— Petr Čermák (@petrscience) March 4, 2024
3) He showed a video of flipping the sample with tweezers, arguing that this rules out ferromagnetism. pic.twitter.com/IZDttuORew
— Petr Čermák (@petrscience) March 4, 2024
5) Zero resistance curves. I am not sure if all were published before. pic.twitter.com/6kBcByDuZb
— Petr Čermák (@petrscience) March 4, 2024
6) Imo this is the most interesting slide explaining their view on the phase diagram of other phases. pic.twitter.com/OnAjiekwqI
— Petr Čermák (@petrscience) March 4, 2024
7) Conclusions… Thanks Dr. Kim Hyun-Tak for presentation! pic.twitter.com/7rZpq95ooH
— Petr Čermák (@petrscience) March 4, 2024
The talk was scheduled for a few minutes ago. Waiting to hear reports as it was NOT streamed live. Sinéad Griffin is one of the Berkeley National Lab scientists who worked on simulations of LK99.
Didn’t make it into the talk #lk99 #APSMarchMeeting pic.twitter.com/vLRWHmLqZq
— Sinéad Griffin (@sineatrix) March 4, 2024
Talk on #LK99 doped with sulfur at #apsmarch is going to start. The small room is full and the team seems very confident https://t.co/gwc4a8ThEa
People in the auditorium remain very sceptical. Do you have some questions to ask the Dr. Kim Hyun-tak? pic.twitter.com/PA4n83KX02
— Petr Čermák (@petrscience) March 4, 2024
There were two questions: 1) how partially levitated sample behaves when moving from center to edge of the magnet 2) my question: how reproducible is your procedure of sample preparation.
— Petr Čermák (@petrscience) March 4, 2024
The original team of South Korean LK99 Room Temperature and atmospheric pressure superconductors researchers will have a short 12 minute presentation at the American Physical Society conference. The new material is PCPOSOS which is LK99 with some sulfur in the chemistry.
Abstract: A16.00002 : Partial levitation, type-II-superconductor characteristic, at room temperature and atmospheric pressure in PCPOSOS 8:12 AM–8:24 AM
Presenter:
Hyun-Tak Kim
(College of William and Mary)
Authors:
Hyun-Tak Kim
(College of William and Mary)
Sukbae Lee
(QERC in Korea)
Sungyeon Im
(QERC in Korea)
SooMin An
(QERC in Korea)
Keun Ho Auh
(QERC in Korea)
Collaboration:
College of William & Mary, Quantum Energy Research Center in Korea
We synthesized materials, Pb10-xCux(P(O1-ySy)4)6O1-zSz (PCPOSOS), called PCPOSOS, which exhibit superconducting behavior at room temperature and atmospheric pressure. These materials displayed characteristics of a superconductor, including zero resistance, the Meissner effect, and partial levitation when placed on a magnet (arXiv: 2307.12037). The partial levitation is caused by an inhomogeneity in the magnetic field of the magnet and occurred within the range of critical magnetic fields, Hc1 and Hc2. That is, the magnetic field of the magnet increased with going from center to the edge of magnet. The magnet had approximately 2000G at the center and approximately 3,000G at its edge. The levitation occurred near center. This indicates the center of the magnet is close to Hc1. It disappeared between center and the edge near Hc2, with Hc1 being much smaller than Hc2, because the magnetic moment at Hc2 is much smaller than that at Hc1. When the magnet is slightly moved, the levitation returns to its original position. This phenomenon is analyzed as flux pinning, which is typical of a type-II superconductor. Moreover, the quantum-locking phenomenon, characteristic of a Type-I superconductor, may appear. However, we interpret PCPOSOS as a Type-II superconductor. We will show two videos of levitations and two videos of magnets.
Brian Wang is a Futurist Thought Leader and a popular Science blogger with 1 million readers per month. His blog Nextbigfuture.com is ranked #1 Science News Blog. It covers many disruptive technology and trends including Space, Robotics, Artificial Intelligence, Medicine, Anti-aging Biotechnology, and Nanotechnology.
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