Peak in the critical current density in 
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Liu, Xinyou; Zhang, Wei; Lai, Kwing To; Moriyama, K.; Tallon, J. L.; Yoshimura, Kazuyoshi; Goh, Swee K.

doi:10.1103/physrevb.105.214524

Cited by 7 publications

(3 citation statements)

References 49 publications

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“…The field of experimental and theoretical studies of materials with strongly correlated charge carriers [46][47][48][49]57,[59][60][61]74,[98][99][100][101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116], including diborides [44,[46][47][48][49]107,108], is experiencing a boom. In this work, we deduced the primary superconducting parameters of highly compressed diborides: the P6/mmm phases of MoB 2 and WB 2 and ambient pressure superconductors Nd 0.75 Mo 0.25 B 2 .…”

Section: Discussionmentioning

confidence: 99%

D-Wave Superconducting Gap Symmetry as a Model for Nb1−xMoxB2 (x = 0.25; 1.0) and WB2 Diborides

Talantsev

2023

Symmetry

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Recently, Pei et al. (National Science Review2023, nwad034, 10.1093/nsr/nwad034) reported that ambient pressure β-MoB2 (space group: R3¯m) exhibits a phase transition to α-MoB2 (space group: P6/mmm) at pressure P~70 GPa, which is a high-temperature superconductor exhibiting Tc=32 K at P~110 GPa. Although α-MoB2 has the same crystalline structure as ambient-pressure MgB2 and the superconducting critical temperatures of α-MoB2 and MgB2 are very close, the first-principles calculations show that in α-MoB2, the states near the Fermi level, εF, are dominated by the d-electrons of Mo atoms, while in MgB2, the p-orbitals of boron atomic sheets dominantly contribute to the states near the εF. Recently, Hire et al. (Phys. Rev. B2022, 106, 174515) reported that the P6/mmm-phase can be stabilized at ambient pressure in Nb1−xMoxB2 solid solutions, and that these ternary alloys exhibit Tc~8 K. Additionally, Pei et al. (Sci. China-Phys. Mech. Astron. 2022, 65, 287412) showed that compressed WB2 exhibited Tc~15 K at P~121 GPa. Here, we aimed to reveal primary differences/similarities in superconducting state in MgB2 and in its recently discovered diboride counterparts, Nb1−xMoxB2 and highly-compressed WB2. By analyzing experimental data reported for P6/mmm-phases of Nb1−xMoxB2 (x = 0.25; 1.0) and highly compressed WB2, we showed that these three phases exhibit d-wave superconductivity. We deduced 2Δm(0)kBTc=4.1±0.2 for α-MoB2, 2Δm(0)kBTc=5.3±0.1 for Nb0.75Mo0.25B2, and 2Δm(0)kBTc=4.9±0.2 for WB2. We also found that Nb0.75Mo0.25B2 exhibited high strength of nonadiabaticity, which was quantified by the ratio of TθTF=3.5, whereas MgB2, α-MoB2, and WB2 exhibited TθTF~0.3, which is similar to the TθTF in pnictides, A15 alloys, Heusler alloys, Laves phase compounds, cuprates, and highly compressed hydrides.

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Section: Discussionmentioning

confidence: 99%

D-Wave Superconducting Gap Symmetry as a Model for Nb1−xMoxB2 (x = 0.25; 1.0) and WB2 Diborides

Talantsev

2023

Symmetry

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“…CDW order is suppressed in Ca 3 Rh 4 Sn 13 , and the superconducting T c reaches 8.3 K [19]. Structural QCP was confirmed by x-ray diffraction (XRD) in the superconducting state, as well as by measurements of the critical current [20][21][22]. Simultaneously, a non-Fermi-liquid behavior of the electrical resistivity was found, consistent with the presence of QCP.…”

Section: Introductionmentioning

confidence: 76%

Robust superconductivity and the suppression of charge-density wave in the quasi-skutterudites Ca 3 (
Krenkel,
Tanatar,
Ghimire
et al. 2024
J. Phys.: Condens. Matter
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The coexistence and competition between the charge density wave (CDW) and superconductivity was studied by varying the Rh/Ir ratio. The superconducting transition temperature, $T_c$, varies from 7 K in pure Ir ($x=0$)to 8.3 K in pure Rh ($x=1$). Temperature-dependent electrical resistivity reveals monotonic suppression of the CDW transition temperature, $T_{\text{CDW}}(x)$. The CDW starts in pure Ir, $x=0$, at $T_{\text{CDW}}\approx40$~K and extrapolates roughly linearly to zero at $x_c \approx 0.53-0.58$ under the superconducting dome. Magnetization and transport measurements show a significant influence of CDW on superconducting and normal states. Meissner expulsion is substantially reduced in the CDW region, indicating competition between the CDW and superconductivity. The low-temperature resistivity is higher in the CDW part of the phase diagram, consistent with the reduced density of states due to CDW gapping. Its temperature dependence just above $T_c$ shows signs of non-Fermi liquid behavior in a cone-like composition pattern. We conclude that the $\text{Ca}_3(\text{Ir}_{1-x}\text{Rh}_x)_4\text{Sn}_{13}$ alloy is a good candidate for a composition-driven quantum critical point (QCP) at ambient pressure.Temperature-dependent electrical resistivity reveals monotonic suppression of the CDW transition temperature, $T_{\text{CDW}}(x)$. The CDW starts in pure Ir, $x=0$, at $T_{\text{CDW}}\approx40$~K and extrapolates roughly linearly to zero at $x_c \approx 0.53-0.58$ under the superconducting dome. Magnetization and transport measurements show a significant influence of CDW on superconducting and normal states. Meissner expulsion is substantially reduced in the CDW region, indicating the competition between the CDW and superconductivity. The low-temperature resistivity is higher in the CDW part of the phase diagram, consistent with the reduced density of states due to CDW gapping. Its temperature dependence just above $T_c$ shows clear signs of non-Fermi-liquid behavior in a cone-like composition pattern. We conclude that the $\text{Ca}_3(\text{Ir}_{1-x}\text{Rh}_x)_4\text{Sn}_{13}$ alloy is a good candidate for a composition-driven quantum critical point (QCP) at ambient pressure.

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“…Structural lower-symmetry models, hettotypes, have been reported, and their relationship to the Yb 3 Rh 4 Sn 13 structure type, aristotype, can be explained on the basis of group–subgroup schemes. , A summary of the lower-symmetry derivatives of the Yb 3 Rh 4 Sn 13 structure type was provided by Oswald et al The Yb 3 Rh 4 Sn 13 structure type and its hettotypes are of interest due to the wide spectrum of physical properties, such as the coexistence of superconductivity and charge density waves in a 3D structure, − the presence of a quantum critical point through pressure and/or chemical substitution, , and Weyl–Kondo semimetal in a chiral phase, to mention a few.…”

Section: Remeika Phases: a Platform For Intermetallic Pseudoperovskitesmentioning

confidence: 99%

Development of a Geometric Descriptor for the Strategic Synthesis of Remeika Phases

et al. 2023

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Remeika phases, also described as pseudoperovskites, are cage-like structures with emergent properties. In this Perspective, we first cover heuristic methods used to overcome the challenges to rationalize the stability of extended solids. We highlight the important role Goldschmidt's tolerance factor has played in enhancing research related to perovskites and their derivatives. We discuss the development of a tolerance factor for predicting the stability of intermetallic pseudoperovskites, the Remeika phases, and rationalize oxidation states in correlation with valence fluctuation. To evaluate the feasibility of the Remeika phase tolerance factor, we synthesized the new predicted compound Yb 5 Ru 6 Sn 18 with a magnetic moment (μ eff ) of 3.2 μ B /Yb. We then highlight the importance of determining the factors dictating the stability of the Remeika intermetallics.

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Peak in the critical current density in (CaxSr1−x)3Rh4

Cited by 7 publications

References 49 publications

D-Wave Superconducting Gap Symmetry as a Model for Nb1−xMoxB2 (x = 0.25; 1.0) and WB2 Diborides

D-Wave Superconducting Gap Symmetry as a Model for Nb1−xMoxB2 (x = 0.25; 1.0) and WB2 Diborides

Robust superconductivity and the suppression of charge-density wave in the quasi-skutterudites Ca 3 (
Krenkel,
Tanatar,
Ghimire
et al. 2024
J. Phys.: Condens. Matter
1
0
0
0
View full text Add to dashboard Cite

Development of a Geometric Descriptor for the Strategic Synthesis of Remeika Phases

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Peak in the critical current density in (CaxSr1−x)3Rh4

Cited by 7 publications

References 49 publications

D-Wave Superconducting Gap Symmetry as a Model for Nb1−xMoxB2 (x = 0.25; 1.0) and WB2 Diborides

D-Wave Superconducting Gap Symmetry as a Model for Nb1−xMoxB2 (x = 0.25; 1.0) and WB2 Diborides

Robust superconductivity and the suppression of charge-density wave in the quasi-skutterudites Ca 3 ( Krenkel, Tanatar, Ghimire et al. 2024J. Phys.: Condens. Matter1000View full textAdd to dashboardCite

Development of a Geometric Descriptor for the Strategic Synthesis of Remeika Phases

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Product

Resources

About

Robust superconductivity and the suppression of charge-density wave in the quasi-skutterudites Ca 3 (
Krenkel,
Tanatar,
Ghimire
et al. 2024
J. Phys.: Condens. Matter
1
0
0
0
View full text Add to dashboard Cite