Superconductivity of light‐metal hydrides

Lv, Huiying; Chen, Ming; Feng, Yang; Li, Wenjie; Zhong, Guo‐Hua; Yang, Chunlei

doi:10.1002/jccs.201800453

Cited by 8 publications

(8 citation statements)

References 95 publications

(114 reference statements)

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“…Up to now, most studies were focused on binary hydrides [12][13][14][15][16][17][18][19][20]. The recent progress on this theme can be found in review articles [21][22][23][24][25][26][27]. However, ternary hydrides might also be potential high-temperature superconductors [28][29][30][31][32][33], and some studies have shown that they not only show high superconducting transition temperatures (T c ) but also exhibit unexpected superconducting mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Phase diagrams and electronic properties of B-S and H-B-S systems under high pressure

Zhang

Lin

et al. 2019

Phys. Rev. B

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Pressure has become an effective way to obtain new materials with desirable properties. Considering the various stoichiometries, wide applications, and unique structures of binary H-S, H-B, and B-S compounds, especially at high pressures, it is worth expecting that they might form ternary compounds with interesting properties as well. Here, phase stabilities of H-B-S ternary compounds, in the pressure range from 0 to 200 GPa, are reliably determined through first-principles unbiased structural search calculations. A hitherto unknown orthorhombic HBS compound with Ama2 symmetry is identified to be stable above 25 GPa, in which B and S atoms alternate to form distorted chains and H atoms are covalently bonded with Bs. With pressure, Ama2 HBS undergoes a semiconductor-to-metal electronic transition and even becomes superconducting. The exploration of the binary B-S phase diagram indicates that B-S compounds tend to decompose into elemental solids above 208 GPa. However, two S-rich phases, B 2 S 3 and BS 2 , are predicted at low pressures, exhibiting semiconducting and metallic properties, respectively. BS 2 shows a calculated T c value of 21.9 K at 200 GPa, becoming a superconductor among bulk binary B-S compounds.

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Section: Introductionmentioning

confidence: 99%

Phase diagrams and electronic properties of B-S and H-B-S systems under high pressure

Zhang

Lin

et al. 2019

Phys. Rev. B

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“…[9][10][11][12][13] For instance, it is predicted that the T c of YH 10 is up to 323 K [13][14][15] LaH 10 for 260 K, [15][16][17] CeH 10 for 115 K, 18 TbH 10 for 270 K, 19 and AcH 16 for 199-241 K. 15 As a major class of hydrides, alkaline earth metal hydrides have attracted much attention due to their non-toxicity, high volumetric hydrogen density and strong ionicity. [20][21][22] It has been shown that the interaction between metal and hydrogen atoms under pressure induces favorable charge transfer from the hydrogen atom, which then further promotes a good superconducting performance. [23][24][25][26][27][28] Hence, the well-known barium hydride, BaH 6 (with a P4/mmm structure), can achieve a superconducting transition temperature (T c ) of 30-38 K at 100 GPa.…”

Section: Introductionmentioning

confidence: 99%

Composition and structural characteristics of compressed alkaline earth metal hydrides

Tao,

Zeng,

Gao

et al. 2023

Phys. Chem. Chem. Phys.

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“…Recently, the T c values of H 3 S 6 and LaH 10 7 reach 203 K and 250 K under high pressure, respectively, bringing the dream of room‐temperature superconductivity within reach, and re‐stimulating the upsurge of H‐containing traditional superconductors. Indeed, Ashcroft has proposed metallic hydrogen and pressure‐induced superhydrides to be potential high‐temperature superconductors, 8,9 playing a guiding role in the development of H‐containing traditional superconductors 10–15 …”

Section: Introductionmentioning

confidence: 99%

“…Indeed, Ashcroft has proposed metallic hydrogen and pressure-induced superhydrides to be potential hightemperature superconductors, 8,9 playing a guiding role in the development of H-containing traditional superconductors. [10][11][12][13][14][15] Until now, the binary hydrides of almost all of elements in periodic table have been explored theoretically and experimentally. [16][17][18] Among them, as expected by Ashcroft, a plethora of H-rich compounds have been predicted to exhibit high-T c superconductivity above 200 K such as H 3 S, 6 CaH 6 , 11 MgH 6 , 19 YH 6 , 20 YH 9 , 21 LaH 10 , 7 YH 10 , 12,22 SrH 10 , 23 ThH 10 , 24 AcH 10 , 25 AcH 16 , 25 and HfH 10 10 et al Significantly, the high-T c superconductivity of H 3 S, LaH 10 , and YH 9 has been confirmed in experiment.…”

Section: Introductionmentioning

confidence: 99%

Superconducting ternary hydrides under high pressure

Zhang

Zhao

Yang

2021

WIREs Comput Mol Sci

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Achieving room-temperature superconductivity is an important goal in chemistry and physics. Excitingly, pressure-induced superconducting hydrides, a typical representative of LaH 10 with a critical temperature (T c ) of 250-260 K around 180-200 GPa, bring this goal within reach, igniting an irresistible wave of discovering new H-containing superconductors. Moreover, this breakthrough finding was achieved under the guidance of theoretical prediction.Thus far, the superconductivity of binary hydrides has been extensively explored. However, the high-temperature superconductor, facilitating practical application, is still rare. Ternary hydrides can provide more abundant structures resulting from diverse chemical compositions and synergistic charge transfer, combine the merits of different elements, and induce strong electronphonon coupling, which make them an appealing contender for superconductors. Recently, much research progress has been made in pressure-induced superconducting ternary hydrides. In this regard, we summarize the recent development of superconducting ternary hydrides, highlighting the chemical composition, structure, pressure, and T c value as well as the study of doping/ substitution on the known superconducting binary hydrides. The recent stateof-the-art of theoretical approaches for predicting superconductors and fundamental characters of ternary hydrides with high T c are outlined. On the other hand, the problems, challenges, and opportunities are presented, providing an outlook for future research.

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Superconductivity of light‐metal hydrides

Cited by 8 publications

References 95 publications

Phase diagrams and electronic properties of B-S and H-B-S systems under high pressure

Phase diagrams and electronic properties of B-S and H-B-S systems under high pressure

Composition and structural characteristics of compressed alkaline earth metal hydrides

Superconducting ternary hydrides under high pressure

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