Anomalous High-Temperature Superconductivity in YH6

被引：304

作者：

Troyan, Ivan A. ^{[1
]}

Semenok, Dmitrii V. ^{[2
]}

Kvashnin, Alexander G. ^{[2
]}

Sadakov, Andrey V. ^{[3
]}

Sobolevskiy, Oleg A. ^{[3
]}

Pudalov, Vladimir M. ^{[3
,4
]}

Ivanova, Anna G. ^{[1
]}

Prakapenka, Vitali B. ^{[5
]}

Greenberg, Eran ^{[5
]}

Gavriliuk, Alexander G. ^{[1
,6
]}

Lyubutin, Igor S. ^{[1
]}

Struzhkin, Viktor V. ^{[7
]}

Bergara, Aitor ^{[8
,9
,10
]}

Errea, Ion ^{[8
,10
,11
]}

Bianco, Raffaello ^{[8
]}

Calandra, Matteo ^{[12
,13
,14
]}

Mauri, Francesco ^{[14
,15
]}

Monacelli, Lorenzo ^{[14
,15
]}

Akashi, Ryosuke ^{[16
]}

Oganov, Artem R. ^{[2
]}

机构：

[1] Russian Acad Sci, Shubnikov Inst Crystallog, Fed Sci Res Ctr Crystallog & Photon, 59 Leninskii Prospect, Moscow 119333, Russia

[2] Skolkovo Inst Sci & Technol, Skolkovo Innovat Ctr, 3 Nobel St, Moscow 121025, Russia

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

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

[5] Univ Chicago, Ctr Adv Radiat Sources, 5640 South Ellis Ave, Chicago, IL 60637 USA

[6] Russian Acad Sci, Inst Nucl Res, Fizicheskaya Str 27, Moscow 108840, Russia

[7] Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China

[8] Univ Basque Country, Ctr Fis Mat, CSIC, Paseo Manuel de Lardizabal 5, Donostia San Sebastian 20018, Spain

[9] Univ Basque Country UPV EHU, Dept Fis Mat Condensada, Bilbao 48080, Spain

[10] Donostia Int Phys Ctr DIPC, Manuel Lardizabal Pasealekua 4, Donostia San Sebastian 20018, Spain

[11] Univ Basque Country UPV EHU, Fis Aplikatua Saila 1, Europa Plaza 1, Donostia San Sebastian 20018, Spain

[12] Univ Trento, Dept Fis, Via Sommar 14, I-38123 Povo, Italy

[13] Sorbonne Univ, CNRS, Inst Nanosci Paris, UMR7588, F-75252 Paris, France

[14] Fdn Ist Italiano Tecnol, Graphene Labs, Via Morego, I-16163 Genoa, Italy

[15] Univ Roma Sapienza, Dipartimento Fis, Piazzale Aldo Moro 5, I-00185 Rome, Italy

[16] Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138654, Japan

来源：

ADVANCED MATERIALS | 2021年 / 33卷 / 15期

基金：

欧洲研究理事会; 俄罗斯科学基金会; 俄罗斯基础研究基金会; 美国国家科学基金会;

关键词：

Bardeen– Cooper– Schrieffer theory; Migdal– Eliashberg theory; pressure‐ stabilized hydrides; superconductivity; yttrium hydrides; yttrium hexahydride; CRYSTAL-STRUCTURE PREDICTION; ELECTRON; LANTHANUM; SYSTEM; TRANSITION; DYNAMICS; HYDRIDES; YTTRIUM;

D O I：

10.1002/adma.202006832

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pressure-stabilized hydrides are a new rapidly growing class of high-temperature superconductors, which is believed to be described within the conventional phonon-mediated mechanism of coupling. Here, the synthesis of one of the best-known high-T-C superconductors-yttrium hexahydride Im3 over bar m-YH6 is reported, which displays a superconducting transition at approximate to 224 K at 166 GPa. The extrapolated upper critical magnetic field B-c2(0) of YH6 is surprisingly high: 116-158 T, which is 2-2.5 times larger than the calculated value. A pronounced shift of T-C in yttrium deuteride YD6 with the isotope coefficient 0.4 supports the phonon-assisted superconductivity. Current-voltage measurements show that the critical current I-C and its density J(C) may exceed 1.75 A and 3500 A mm(-2) at 4 K, respectively, which is higher than that of the commercial superconductors, such as NbTi and YBCO. The results of superconducting density functional theory (SCDFT) and anharmonic calculations, together with anomalously high critical magnetic field, suggest notable departures of the superconducting properties from the conventional Migdal-Eliashberg and Bardeen-Cooper-Schrieffer theories, and presence of an additional mechanism of superconductivity.

引用

页数：10

共 82 条

[81] Superconducting praseodymium superhydrides [J].

Zhou, Di ;

Semenok, Dmitrii ;

Duan, Defang ;

Xie, Hui ;

Huang, Xiaoli ;

Chen, Wuhao ;

Li, Xin ;

Liu, Bingbing ;

Oganov, Artem R. ;

Cui, Tian .

SCIENCE ADVANCES, 2020, 6 (09)

[82] High-Pressure Synthesis of Magnetic Neodymium Polyhydrides [J].

Zhou, Di ;

Semenok, Dmitrii V. ;

Xie, Hui ;

Huang, Xiaoli ;

Duan, Defang ;

Aperis, Alex ;

Oppeneer, Peter M. ;

Galasso, Michele ;

Kartsev, Alexey I. ;

Kvashnin, Alexander G. ;

Oganov, Artem R. ;

Cui, Tian .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2020, 142 (06) :2803-2811

← 1 2 3 4 5 6 7 8 9 →