Superconductivity, electronic phase diagram, and pressure effect in Sr1−xPrxFBiS2

You, Wei; Li, Lin; Yang, HaiYang; Wang, JiaLu; Mao, Hongying; Zhang, Li; Xi, Chuanying; Cheng, Jie; Luo, Yongkang; Dai, Jianhui; Li, Yuke

doi:10.1007/s11433-018-9326-4

Cited by 6 publications

(6 citation statements)

References 29 publications

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“…2, we observed that the lattice constant a decreased with decreasing RE ionic radius; however, the lattice constant c increased under these conditions. The obtained values were in agreement with previous reports 12,30,31 . The chemical composition ratios of the samples were determined using energy dispersive X-ray spectroscopy (EDX).…”

Section: Resultssupporting

confidence: 93%

“…Thus far, various types of BiS2based compounds have been synthesized by replacing different blocking layers [3][4][5][6][7][8][9][10][11][12][13][14] , such as the Bi4O4(SO4)1-x or (REO) (RE: La, Ce, Pr, Nd, and Sm) layers. By manipulating the layered structures, the replacement of (REO) blocking layers with the SrF blocking layers enabled the development of a new class of BiS2-based Sr1-xRExFBiS2 (RE: La, Ce, Pr, Nd, and Sm) compounds 12,[15][16][17][18][19][20][21] . The parent compound is SrFBiS2, which is a semiconductor with a band gap.…”

Section: Introductionmentioning

confidence: 99%

“…The parent compound is SrFBiS2, which is a semiconductor with a band gap. The substitution of Sr 2+ with RE 3+ induces electron carriers in the BiS2 layer, and filamentary superconductivity appears at approximately 2.8 K in La-, Pr-, and Ce-doped compounds 12 , [17][18][19] .…”

Section: Introductionmentioning

confidence: 99%

“…By applying in-plane chemical pressure, the local structural disorder in the tetragonal structure is removed, and bulk superconductivity is induced 20,21 . To induce bulk superconductivity, external pressure effects are also effective [22][23][24][25][26][27][28][29][30][31][32] . For REO 0.5 F 0.5 BiS 2 and EuFBiS 2 , the T c at ambient condition (~ 2.5 K and ~ 0.5 K) dramatically increase to ~ 10 K under high pressure [23][24][25][26] , and the origin of the increase in T c was explained by a structural transition from tetragonal (P4/nmm) to monoclinic (P2 1 /m) at around 1 GPa for LaO 0.5 F 0.5 BiS 2 and EuFBiS 2 23,24 .…”

mentioning

confidence: 99%

“…The substitution of Sr 2+ with RE 3+ induces electron carriers in the BiS 2 layer, and filamentary superconductivity appears at approximately 2.8 K in La-, Ce-, and Pr-doped compounds [12][13][14][15][29][30][31][32] . Based on electrical resistivity measurements conducted under high pressures, a considerable increase in T c was observed in previous pressure experiments 22,[29][30][31][32] . The highest T c in Sr 0.5 RE 0.5 FBiS 2 is approximately 10 K, and the pressure dependences of T c exhibits a sharp increase at the critical pressure (~ 1 GPa).…”

mentioning

confidence: 99%

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Evolution of two bulk-superconducting phases in Sr0.5RE0.5FBiS2 (RE: La, Ce, Pr, Nd, Sm) by external hydrostatic pressure effect

Yamashita

Jha

Goto

et al. 2020

Sci Rep

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polycrystalline samples of Sr 0.5 RE 0.5 fBiS 2 (RE: La, ce, pr, nd, and Sm) were synthesized via the solidstate reaction and characterized using synchrotron X-ray diffraction. Although all the Sr 0.5 RE 0.5 fBiS 2 samples exhibited superconductivity at transition temperatures (T c) within the range of 2.1-2.7 K under ambient pressure, the estimated superconducting volume fraction was small, which indicates non-bulk nature of superconductivity in those samples under ambient pressure. A dramatic increase in shielding fraction, which indicates the emergence of the bulk superconductivity was achieved by applying external hydrostatic pressures. We found that two phases, low-P phases with T c = 2.5-2.8 K and high-P phases with T c = 10.0-10.8 K, were induced by the pressure effect for samples with RE = La, Ce, Pr, and Nd. Pressure-T c phase diagrams indicated that the critical pressure for the emergence of the high-P phase tends to increase with decreasing ionic radius of the doped RE ions, which was explained by the correlation between external and chemical pressure effects. According to the high-pressure X-ray diffraction measurements of Sr 0.5 La 0.5 fBiS 2 , a structural phase transition from tetragonal to monoclinic also occurred at approximately 1.1 GPa. Bulk superconducting phases in Sr 0.5 RE 0.5 fBiS 2 induced by the external hydrostatic pressure effect are expected to be useful for understanding the effects of both external and chemical pressures to the emergence of bulk superconductivity and pairing mechanisms in BiCh 2-based superconductors. The discovery of superconductivity in BiS 2-based compounds 1,2 such as Bi 4 O 4 S 3 and REO 1-x F x BiS 2 has triggered numerous studies focusing on identifying new superconductors featuring a higher transition temperatures (T c) and elucidating the mechanisms of superconductivity in BiS 2-based compounds. Due to the similarity of the crystal structure among the BiS 2-based, cuprates and iron-based compounds 3,4 , BiS 2-based compounds have been considered as a new example of layered superconductor family. Thus far, various types of BiS 2-based compounds have been synthesized by replacing different blocking layers 1,2,5-17 , such as the Bi 4 O 4 (SO 4) 1−x layer, the REO layer (RE: La, Ce, Pr, Nd, and Sm), or the AEF layer (AE: Sr or Eu). Notably, some BiS 2-based compounds do not exhibit bulk superconductivity even after electron doping. To induce bulk superconductivity in BiS 2-based compounds, various chemical substitutions have been attempted (see review articles) 14,18. Among these, the isovalent substitutions, such as Nd 3+ substitutions for La 3+ or Se 2− substitutions for S 2− , were found to be effective for inducing bulk superconductivity. Based on systematic structural analyses, we have revealed that the in-plane chemical pressure is one of the essential parameters that facilitate the emergence of bulk superconductivity in

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Evolution of two bulk-superconducting phases in Sr0.5RE0.5FBiS2 (RE: La, Ce, Pr, Nd, Sm) by external hydrostatic pressure effect

Yamashita

Jha

Goto

et al. 2020

Sci Rep

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Improvement of superconducting properties by chemical pressure effect in Eu-doped La2-Eu O2Bi3Ag0.6Sn0.4S6

Jha

Goto

Higashinaka

et al. 2020

Physica C: Superconductivity and its Applications

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Large Barocaloric Effect with High Pressure-Driving Efficiency in a Hexagonal MnNi_0.77Fe_0.23Ge Alloy

Zeng¹,

Liu²,

Xi³

et al. 2020

Chinese Phys. Lett.

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The hydrostatic pressure is expected to be an effective knob to tune the magnetostructural phase transitions of hexagonal MM'X alloy. In this study, magnetization measurements under hydrostatic pressure were performed on a MM'X martensitic MnNi0.77Fe0.23Ge alloy. The magnetostructural transition temperature can be efficiently tuned to lower temperatures by applying moderate pressures, with a giant shift rate of -151 K GPa -1 . A temperature span of 30 K is obtained under the pressure, within which a large magnetic entropy change of -23 J kg -1 K -1 in a field change of 5 T is induced by the mechanical energy gain due to the large volume change. Meanwhile, a decoupling of structural and magnetic transitions is observed at low temperatures when the martensitic transition temperature is lower than the Curie temperature. These results show a multi-parameter tunable caloric effect that benefits the solid-state cooling.

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Superconductivity, electronic phase diagram, and pressure effect in Sr1−xPrxFBiS2

Cited by 6 publications

References 29 publications

Evolution of two bulk-superconducting phases in Sr0.5RE0.5FBiS2 (RE: La, Ce, Pr, Nd, Sm) by external hydrostatic pressure effect

Evolution of two bulk-superconducting phases in Sr0.5RE0.5FBiS2 (RE: La, Ce, Pr, Nd, Sm) by external hydrostatic pressure effect

Improvement of superconducting properties by chemical pressure effect in Eu-doped La2-Eu O2Bi3Ag0.6Sn0.4S6

Large Barocaloric Effect with High Pressure-Driving Efficiency in a Hexagonal MnNi_0.77Fe_0.23Ge Alloy

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Superconductivity, electronic phase diagram, and pressure effect in Sr1−xPrxFBiS2

Cited by 6 publications

References 29 publications

Evolution of two bulk-superconducting phases in Sr0.5RE0.5FBiS2 (RE: La, Ce, Pr, Nd, Sm) by external hydrostatic pressure effect

Evolution of two bulk-superconducting phases in Sr0.5RE0.5FBiS2 (RE: La, Ce, Pr, Nd, Sm) by external hydrostatic pressure effect

Improvement of superconducting properties by chemical pressure effect in Eu-doped La2-Eu O2Bi3Ag0.6Sn0.4S6

Large Barocaloric Effect with High Pressure-Driving Efficiency in a Hexagonal MnNi0.77Fe0.23Ge Alloy

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Large Barocaloric Effect with High Pressure-Driving Efficiency in a Hexagonal MnNi_0.77Fe_0.23Ge Alloy