Superconductivity in 122-type antimonide<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi mathvariant="normal">BaPt</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">Sb</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>

Imai, Motoharu; Ibuka, Soshi; Kikugawa, Naoki; Terashima, Taichi; Uji, S.; Yajima, Takeshi; Kageyama, Hiroshi; Hase, Izumi

doi:10.1103/physrevb.91.014513

Cited by 20 publications

(21 citation statements)

References 49 publications

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“…The main contributors to the DOS at the Fermi energy are the d states of Pt ions in the As-Pt-As layer of SrPt 2 As 2 [37,38,26]. Similar trends have been reported for BaPd 2 Sb 2 [39] and BaPt 2 Sb 2 [29]. Therefore, this may be a general trend for the CaBe 2 Ge 2 -type materials [40].…”

Section: Discussionsupporting

confidence: 77%

“…The systematic absence of reflections suggests that the candidate space groups are Cm, C2 or C2/m. Assuming that the sample has the BaPt 2 Sb 2 -type structure [29], of which the space group is C2/m, then the calculated pattern reproduces the observed XRD pattern with R factors [30] of R exp = 5.8%, R p = 12.5% and R wp = 16.3%. This indicates that the HT phase of Figure 1(b) shows the XRD pattern for the low-temperature (LT) phase measured at T = 93 K, in addition to the calculated pattern.…”

Section: Resultsmentioning

confidence: 73%

“…However, the other compounds show similar T c between 1.3 and 2.1 K, regardless of the CDW order, which indicates that there is no close correlation between superconductivity and the CDW. In addition, SrPt 2 As 2 and other CaBe 2 Ge 2 -type materials have similar electronic structures, as determined from band calculations [37,38,39,29,26]. The main contributors to the DOS at the Fermi energy are the d states of Pt ions in the As-Pt-As layer of SrPt 2 As 2 [37,38,26].…”

Section: Discussionmentioning

confidence: 74%

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Possibility of charge density wave transition in a SrPt₂Sb₂superconductor

Ibuka¹,

Imai²

2016

J. Phys.: Condens. Matter

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Abstract. The first-order transition at T 0 = 270 K for the platinum-based SrPt 2 Sb 2 superconductor was investigated using X-ray diffraction and magnetic susceptibility measurements. When polycrystalline SrPt 2 Sb 2 was cooled down through T 0 , the structure was transformed from monoclinic to a modulated orthorhombic structure, and no magnetic order was formed, which illustrates the possibility of a charge density wave (CDW) transition at T 0 . SrPt 2 Sb 2 can thus be a new example to examine the interplay of CDW and superconductivity in addition to SrPt 2 As 2 , BaPt 2 As 2 , and LaPt 2 Si 2 . It is unique that the average structure of the low-temperature phase has higher symmetry than that of the high-temperature phase.

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Section: Discussionsupporting

confidence: 77%

Section: Resultsmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 74%

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Possibility of charge density wave transition in a SrPt₂Sb₂superconductor

Ibuka¹,

Imai²

2016

J. Phys.: Condens. Matter

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“…The Ba-derivative of the aforementioned compound, BaPt 2 Sb 2 had not been reported, and was prepared first in the FIRST Project by the arc melting method for a Ba, Pt and Sb mixtures [42]. The x-ray pattern of the BaPt 2 Sb 2 sample was consistent with a monoclinic lattice having parameters of a = 6.702 Å, b = 6.752 Å, c = 10.47 Å and β = 91.23°.…”

Section: New Superconductorsmentioning

confidence: 99%

Section: New Superconductorsmentioning

confidence: 99%

Exploration of new superconductors and functional materials, and fabrication of superconducting tapes and wires of iron pnictides

Hosono

Tanabe

Takayama‐Muromachi

et al. 2015

Science and Technology of Advanced Materials

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199

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This review shows the highlights of a 4-year-long research project supported by the Japanese Government to explore new superconducting materials and relevant functional materials. The project found several tens of new superconductors by examining ∼1000 materials, each of which was chosen by Japanese experts with a background in solid state chemistry. This review summarizes the major achievements of the project in newly found superconducting materials, and the fabrication wires and tapes of iron-based superconductors; it incorporates a list of ∼700 unsuccessful materials examined for superconductivity in the project. In addition, described are new functional materials and functionalities discovered during the project.

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