التفاصيل البيبلوغرافية
| العنوان: |
Non‐Fermi‐Liquid Behavior of Superconducting SnH4. |
| المؤلفون: |
Troyan, Ivan A., Semenok, Dmitrii V., Ivanova, Anna G., Sadakov, Andrey V., Zhou, Di, Kvashnin, Alexander G., Kruglov, Ivan A., Sobolevskiy, Oleg A., Lyubutina, Marianna V., Perekalin, Dmitry S., Helm, Toni, Tozer, Stanley W., Bykov, Maxim, Goncharov, Alexander F., Pudalov, Vladimir M., Lyubutin, Igor S. |
| المصدر: |
Advanced Science; 10/26/2023, Vol. 10 Issue 30, p1-10, 10p |
| مصطلحات موضوعية: |
FERMI liquid theory, MAGNETIC fields, CUPRATES, CRITICAL currents, FLUX pinning, SUPERCONDUCTORS |
| مستخلص: |
The chemical interaction of Sn with H2 by X‐ray diffraction methods at pressures of 180–210 GPa is studied. A previously unknown tetrahydride SnH4 with a cubic structure (fcc) exhibiting superconducting properties below TC = 72 K is obtained; the formation of a high molecular C2/m‐SnH14 superhydride and several lower hydrides, fcc SnH2, and C2‐Sn12H18, is also detected. The temperature dependence of critical current density JC(T) in SnH4 yields the superconducting gap 2Δ(0) = 21.6 meV at 180 GPa. SnH4 has unusual behavior in strong magnetic fields: B,T‐linear dependences of magnetoresistance and the upper critical magnetic field BC2(T) ∝ (TC – T). The latter contradicts the Wertheimer–Helfand–Hohenberg model developed for conventional superconductors. Along with this, the temperature dependence of electrical resistance of fcc SnH4 in non‐superconducting state exhibits a deviation from what is expected for phonon‐mediated scattering described by the Bloch‐Grüneisen model and is beyond the framework of the Fermi liquid theory. Such anomalies occur for many superhydrides, making them much closer to cuprates than previously believed. [ABSTRACT FROM AUTHOR] |
|
Copyright of Advanced Science is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Full Text Finder