3 ms·
https://arxiv.org/pdf/2401.00999.pdf https://arxiv.org/pdf/2401.00999.pdf Possible Meissner effect near room temperature in copper-substituted lead apatite Hon
by neom 3y ago
https://arxiv.org/pdf/2401.00999.pdf https://arxiv.org/pdf/2401.00999.pdf
Possible Meissner effect near room temperature in
copper-substituted lead apatite
Hongyang Wang1∗
, Yao Yao2†
, Ke Shi3
, Yijing Zhao3
, Hao
Wu4
, Zhixing Wu5
, Zhihui Geng6
, Shufeng Ye1
, and Ning Chen7
1 Center of Materials Science and Optoelectronics Engineering,
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100049, China
2 State Key Laboratory of Luminescent Materials and Devices and Department of Physics,
South China University of Technology, Guangzhou 510640, China
3 Beijing 2060 Technology Co., Ltd, Beijing 100084, China
4 School of Materials Science and Engineering,
Huazhong University of Science and Technology, Wuhan 430074, China
5 Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food safety,
College of Chemistry, Fuzhou University, Fuzhou 350108, China
6 School of Engineering, Course of Applied Science,
Tokai University, Hiratsuka 2591292, Japan
7 School of Materials Science and Engineering,
University of Science and Technology Beijing, Beijing 100083, China
(Dated: January 3, 2024)
"In summary, the diamagnetism in CSLA has been investigated via both M-T curves and
hysteresis M-H loops, which can be observed up to 250 K. Given the ZFC-FC bifurcation
at above 300 K, we think there is still great chance to observe room-temperature superconductivity. The signals in our sample are still extremely weak, so we have to devote efforts
to further synthesizing scalable samples with more active components."
- cwillu 3y ago“The X-ray diffraction (XRD) data for the sample undergoes refinement using the Reflex module in Materials Studio, aligning with the P63/m structure characteristics of apatite, as illustrated in Fig. 4. However, a slight discrepancy is noted in the range of 25–27° and 30-40°, potentially originated from a minor presence of residual oxide. Despite an extended period of roasting under a pure oxygen atmosphere, the interference from cuprous sulfide still persists, attributed to the intentional addition of sulfur elements during synthesis. Complete elimination of this interference remains challenging. In summary, the diamagnetism in CSLA has been investigated via both M-T curves and hysteresis M-H loops, which can be observed up to 250 K. Given the ZFC-FC bifurcation at above 300 K, we think there is still great chance to observe room-temperature superconductivity. The signals in our sample are still extremely weak, so we have to devote efforts to further synthesizing scalable samples with more active components.”