324 citations · 1.1k across the 24 of their papers we have counts for
21 papers · 1 filter
Progress, problems and prospects of room-temperature superconductivity
Ivan A. Troyan, Dmitrii V. Semenok, Andrey V. Sadakov +2
Discovery of superconductivity at megabar (MB) pressures in hydrogen sulfide H3S, then in metal polyhydrides, starting with binary, LaH10, etc., and ending with ternary ones, inclu…
Quasi Two-dimensional Vortex Matter in ThH Superhydride
Andrey V. Sadakov, Vladimir A. Vlasenko, Dmitrii V. Semenok +4
A comprehensive study of the vortex phases and vortex dynamics is presented for a recently discovered high-temperature superconductor ThH with = 153 K at 17…
Superconductivity in thin films of RuN
A. S. Ilin, A. O. Strugova, I. A. Cohn +7
Superconductivity has been found in RuN films obtained by reactive magnetron sputtering. This is a novel member of the metal nitride superconductors family. The critical temperatur…
Vortex phase dynamics in yttrium superhydride YH at megabar pressures
A. V. Sadakov, V. A. Vlasenko, I. A. Troyan +4
A comprehensive study of the vortex phases and vortex dynamics is presented for a recently discovered high-temperature superconductor YH with T (onset) of 215 K under press…
Non-Fermi-Liquid Behavior of Superconducting SnH
Ivan A. Troyan, Dmitrii V. Semenok, Anna G. Ivanova +13
We studied chemical interaction of Sn with H by X-ray diffraction methods at pressures of 180-210 GPa. A previously unknown tetrahydride SnH with a cubic structure (…
High-temperature superconductivity in hydrides
I. A. Troyan, D. V. Semenok, A. G. Ivanova +7
Over the past six years (2015-2021), many superconducting hydrides with critical temperatures up to 250 K, which are currently record highs, have been discovered. Now we ca…
Effect of paramagnetic impurities on superconductivity in polyhydrides: -wave order parameter in Nd-doped LaH
Dmitrii V. Semenok, Ivan A. Troyan, Andrey V. Sadakov +19
Polyhydrides are a novel class of superconducting materials with extremely high critical parameters, which is very promising for applications. On the other hand, complete experimen…
Superconductivity at 253 K in lanthanum-yttrium ternary hydrides
Dmitrii V. Semenok, Ivan A. Troyan, Alexander G. Kvashnin +14
Polyhydrides offer intriguing perspectives as high-temperature superconductors. Here we report the high-pressure synthesis of a series of lanthanum-yttrium ternary hydrides: cubic…
Electronic Band Structure and Superconducting Properties of SnAs
P. I. Bezotosnyi, K. A. Dmitrieva, A. V. Sadakov +11
We report comprehensive study of physical properties of the binary superconductor compound SnAs. The electronic band structure of SnAs was investigated using both angle-resolved ph…
Superconducting gap symmetry in BaFeNiAs superconductor
T. E. Kuzmicheva, S. A. Kuzmichev, A. V. Sadakov +8
We report on the Andreev spectroscopy and specific heat of high-quality single crystals BaFeNiAs. The intrinsic multiple Andreev reflection spectroscopy revea…
High-pressure effects on isotropic superconductivity in the iron-free layered pnictide superconductor BaPd2As2
M. Abdel-Hafiez, Y. Zhao, Z. Huang +14
While the layered 122 iron arsenide superconductors are highly anisotropic, unconventional, and exhibit several forms of electronic orders that coexist or compete with superconduct…
On the Structure of Superconducting Order Parameter in High-Temperature Fe-Based Superconductors
T. E. Kuzmicheva, A. V. Muratov, S. A. Kuzmichev +7
This paper discusses the synthesis, characterization, and comprehensive study of Ba-122 single crystals with various substitutions and various . The paper uses five complement…
Direct Evidence of Two Superconducting Gaps in FeSeTe: SnS-Andreev Spectroscopy and Lower Critical Field
T. E. Kuzmicheva, S. A. Kuzmichev, A. V. Sadakov +7
We present direct measurements of the superconducting order parameter in nearly optimal FeSeTe single crystals with critical temperature K. Using i…
Probing Bulk Superconducting Order Parameter in Ba(K)FeAs by Four Complementary Techniques
A. V. Muratov, T. E. Kuzmicheva, A. V. Sadakov +7
Using four different experimental techniques, we performed comprehensive studies of the bulk superconductive properties of single crystals of the nearly optimally doped $Ba_{1-x}K_…
Superconducting properties of sulfur-doped iron selenide
Mahmoud Abdel-Hafiez, Yuan-Yuan Zhang, Zi-Yu Cao +8
The recent discovery of high-temperature superconductivity in single-layer iron selenide has generated significant experimental interest for optimizing the superconducting properti…
Experimental study of intrinsic multiple Andreev reflections effect in GdO(F)FeAs superconductor array junctions
T. E. Kuzmicheva, S. A. Kuzmichev, M. G. Mikheev +8
We report the first observation of the intrinsic multiple Andreev reflections effect (IMARE) in S-n-S-...-S-arrays (S = superconductor, n = normal metal) formed by "break-junction"…
Multiple Andreev reflections spectroscopy of two-gap 1111- and 11 Fe-based superconductors
Ya. G. Ponomarev, S. A. Kuzmichev, T. E. Kuzmicheva +10
Using the "break-junction" technique we prepared and studied superconductor - constriction - superconductor nanocontacts in polycrystalline samples of Fe-based superconductors CeO$…
Multigap Superconductivity in GdFeAsO Evidenced by SnS-Andreev Spectroscopy
T. E. Shanygina, S. A. Kuzmichev, M. G. Mikheev +8
Using intrinsic multiple Andreev reflection effect (IMARE) spectroscopy we studied superconducting properties of nearly optimal oxygen-deficient GdFeAsO polycrystalline sa…
Study of the Two-Gap Superconductivity in GdO(F)FeAs by ScS-Andreev Spectroscopy
T. E. Shanygina, Ya. G. Ponomarev, S. A. Kuzmichev +9
Current-voltage characteristics and dynamic conductance of the superconductor - constriction - superconductor junctions in GdO(F)FeAs polycrystalline samples with critical temperat…
Observation of Multi-Gap Superconductivity in GdO(F)FeAs by Andreev Spectroscopy
T. E. Shanygina, Ya. G. Ponomarev, S. A. Kuzmichev +9
We have studied current-voltage characteristics of Andreev contacts in polycrystalline GdOFFeAs samples with bulk critical temperature = (52.5 \pm 1)K usi…
Magnetic and Superconducting Properties of FeAs-based High-Tc Superconductors with Gd
E. P. Khlybov, O. E. Omelyanovsky, A. Zaleski +5
We report on successful synthesis under high pressure of a series of polycrystalline GdFeAs O_{1-x}F_x high-Tc superconductors with different oxygen deficiency x=0.12 - 0.16 and al…