Vortex Phase Dynamics in Yttrium Superhydride YH6 at Megabar Pressures

被引：9

作者：

Sadakov, Andrey V. ^{[1
]}

Vlasenko, Vladimir A. ^{[1
]}

Troyan, Ivan A. ^{[2
]}

Sobolevskiy, Oleg A. ^{[1
]}

Semenok, Dmitrii V. ^{[4
]}

Zhou, Di ^{[4
]}

Pudalov, Vladimir M. ^{[1
,3
]}

机构：

[1] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia

[2] Russian Acad Sci, Shubnikov Inst Crystallog, Fed Sci Res Ctr Crystallog & Photon, Moscow 119333, Russia

[3] Natl Res Univ Higher Sch Econ, Moscow 101000, Russia

[4] Ctr High Pressure Sci & Technol Adv Res, Beijing 100193, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2023年 / 14卷 / 29期

关键词：

TEMPERATURE; SUPERCONDUCTIVITY; MAGNETORESISTANCE; RESISTIVITY; HYDRIDE;

D O I：

10.1021/acs.jpclett.3c01577

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A comprehensive study of vortex phases and vortex dynamicsispresented for a recently discovered high-temperature superconductorYH(6) with T (c)(onset) of 215 Kunder a pressure of 200 GPa. The thermal activation energy (U (0)) is derived within the framework of the thermallyactivated flux flow (TAFF) theory. The activation energy yields apower law dependence U (0) & PROP; H (& alpha;) on magnetic field with a possible crossoverat a field around 8-10 T. Furthermore, we have depicted thevortex phase transition from the vortex-glass to vortex-liquid stateaccording to the vortex-glass theory. Finally, vortex phase diagramis constructed for the first time for superhydrides. Very high estimatedvalues of flux flow barriers U (0)(H) = (1.5-7) x 10(4) K together withhigh crossover fields make YH6 a rather outstanding superconductoras compared to most cuprates and iron-based systems. The Ginzburgnumber for YH6 Gi = (3-7) x10(-3) indicates that thermal fluctuations are notso strong and cannot broaden superconducting transitions in weak magneticfields.

引用

页码：6666 / 6671

页数：6

共 40 条

[1] Scaling of the vortex-liquid resistivity in optimally doped and oxygen-deficient YBa2Cu3O7-δ single crystals -: art. no. 184511 [J].

Andersson, M ;

Rydh, A ;

Rapp, Ö .

PHYSICAL REVIEW B, 2001, 63 (18)

[2]

[Anonymous], 2023, BCS THEOR CRIT CURR

[3] VORTICES IN HIGH-TEMPERATURE SUPERCONDUCTORS [J].

BLATTER, G ;

FEIGELMAN, MV ;

GESHKENBEIN, VB ;

LARKIN, AI ;

VINOKUR, VM .

REVIEWS OF MODERN PHYSICS, 1994, 66 (04) :1125-1388

[4] Thermally activated flux motion in optimally electron-doped (Ca0.85La0.15)10(Pt3As8)(Fe2As2)5 and Ca10(Pt3As8)((Fe0.92Pt0.08)2As2)5 single crystals [J].

Choi, W. J. ;

Seo, Y. I. ;

Ahmad, D. ;

Kwon, Yong Seung .

RESULTS IN PHYSICS, 2020, 19

[5] Effect of the proton irradiation on the thermally activated flux flow in superconducting SmBCO coated conductors [J].

Choi, W. J. ;

Ahmad, D. ;

Seo, Y. I. ;

Ko, R. K. ;

Kwon, Yong Seung .

SCIENTIFIC REPORTS, 2020, 10 (01)

[6] Superconductivity at 250 K in lanthanum hydride under high pressures [J].

Drozdov, A. P. ;

Kong, P. P. ;

Minkov, V. S. ;

Besedin, S. P. ;

Kuzovnikov, M. A. ;

Mozaffari, S. ;

Balicas, L. ;

Balakirev, F. F. ;

Graf, D. E. ;

Prakapenka, V. B. ;

Greenberg, E. ;

Knyazev, D. A. ;

Tkacz, M. ;

Eremets, M. I. .

NATURE, 2019, 569 (7757) :528-+

[7] Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system [J].

Drozdov, A. P. ;

Eremets, M. I. ;

Troyan, I. A. ;

Ksenofontov, V. ;

Shylin, S. I. .

NATURE, 2015, 525 (7567) :73-+

[8] THERMAL FLUCTUATIONS, QUENCHED DISORDER, PHASE-TRANSITIONS, AND TRANSPORT IN TYPE-II SUPERCONDUCTORS [J].

FISHER, DS ;

FISHER, MPA ;

HUSE, DA .

PHYSICAL REVIEW B, 1991, 43 (01) :130-159

[9] FLUX PINNING AND CREEP IN HIGH-TC SUPERCONDUCTORS [J].

GESHKENBEIN, V ;

LARKIN, A ;

FEIGELMAN, M ;

VINOKUR, V .

PHYSICA C, 1989, 162 :239-240

[10] TEMPERATURE AND PURITY DEPENDENCE OF SUPERCONDUCTING CRITICAL FIELD HC2 .2. [J].

HELFAND, E ;

WERTHAME.NR .

PHYSICAL REVIEW, 1966, 147 (01) :288-+

← 1 2 3 4 →