Superconductivity in the Heusler family of intermetallics

Klimczuk, Tomasz; Wang, Cuihuan; Gofryk, K.; Ronning, F.; Winterlik, Jiirgen; Fecher, Gerhard H.; Griveau, Jean‐Christophe; Colineau, E.; Felser, Claudia; Thompson, J. D.; Safarik, D. J.; Cava, R. J.

doi:10.1103/physrevb.85.174505

Cited by 158 publications

(144 citation statements)

References 31 publications

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“…In general, our results are in qualitative agreement with available experimental results. 9,10,12,13,15 In particular, the calculated value of N(E F ) is slightly lower than its experimental value of 2.23 (Ref. 15) while the calculated value of k is higher than its experimental value of 0.70.…”

Section: B Electron-phonon Interaction and Superconductivitymentioning

confidence: 74%

“…9,10,12,13,15 In particular, the calculated value of N(E F ) is slightly lower than its experimental value of 2.23 (Ref. 15) while the calculated value of k is higher than its experimental value of 0.70. 15 When making this comparison, it should be noted that the computed value of N(E F ) comes directly from our band structure results, while the experimentally quoted value is estimated from the measured Sommerfeld coefficient of the specific heat and the estimate of k. Also, our calculated value of k ¼ 0.96 is higher than the experimental value of 0.70.…”

Section: B Electron-phonon Interaction and Superconductivitymentioning

confidence: 74%

“…This peak is mainly due to Pd 4d states with smaller contributions coming from other electronic states. The density of states at the Fermi level (N(E F )) amounts to be 2.06 States/eV which can be compared with its experimental value of 2.23 State/eV in the work of Klimczuk et al 15 The orbital analysis of the DOS shows that mainly the Pd 4d (34%), Y 4d (25%), and Sn 5p (20%) states are contributing to the total value of DOS at the Fermi level. Finally, the unoccupied DOS are mainly dominated by the 4d electrons of Y atom.…”

Section: A Structural and Electronic Propertiesmentioning

confidence: 98%

“…Finally, the calculated superconducting parameters are favourably compared with their corresponding values in the recent experimental work of Klimczuk and co-workers. 15 …”

mentioning

confidence: 99%

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Phonon anomalies and superconductivity in the Heusler compound YPd2Sn

Tütüncü

Srivastava

2014

Journal of Applied Physics

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We have studied the structural and electronic properties of YPd2Sn in the Heusler structure using a generalized gradient approximation of the density functional theory and the ab initio pseudopotential method. The electronic results indicate that the density of states at the Fermi level is primarily derived from Pd d states, which hybridize with Y d and Sn p states. Using our structural and electronic results, phonons and electron-phonon interactions have been studied by employing a linear response approach based on the density functional theory. Phonon anomalies have been observed for transverse acoustic branches along the [110] direction. This anomalous dispersion is merely a consequence of the strong coupling. By integrating the Eliashberg spectral function, the average electron-phonon coupling parameter is found to be λ = 0.99. Using this value, the superconducting critical temperature is calculated to be 4.12 K, in good accordance with the recent experimental value of 4.7 K.

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Section: B Electron-phonon Interaction and Superconductivitymentioning

confidence: 74%

Section: B Electron-phonon Interaction and Superconductivitymentioning

confidence: 74%

Section: A Structural and Electronic Propertiesmentioning

confidence: 98%

“…Finally, the calculated superconducting parameters are favourably compared with their corresponding values in the recent experimental work of Klimczuk and co-workers. 15 …”

mentioning

confidence: 99%

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Phonon anomalies and superconductivity in the Heusler compound YPd2Sn

Tütüncü

Srivastava

2014

Journal of Applied Physics

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“…ZrNi 2 Ga is one of these alloys that show superconductivity with a superconducting (SC) transition temperature of T C ≈ 2.9 K. 9 Including ZrNi 2 Ga there are nearly 19 Heusler superconductors that have 27 valence electrons per formula unit with an average of 6.75 electrons per atom. 11 In common, superconductivity in these materials are explained considering the van Hove singularities, which refers to a saddle point in the energy dispersion curves of the electronic structure of the respective material. 12 Among these 19 superconductors, several are rare-earth metal based, like YbPd 2 Sn and ErPd 2 Sn, where superconductivity and antiferromagnetic interactions co-exist.…”

Section: Introductionmentioning

confidence: 99%

Superconducting properties of Zr1+xNi2-xGa and Zr1-xNi2+xGa Heusler compounds

Alzahrani

Khan

2017

AIP Advances

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The superconducting properties of a series of Zr1+xNi2-xGa and Zr1-xNi2+xGa compounds have been investigated by x-ray diffraction, electrical resistivity, dc magnetization, and ac susceptibility measurements. While the parent compound, ZrNi2Ga, exhibited the cubic L21 Heusler structure, multiple non-cubic structures formed in the Zr and Ni rich doped materials. For x ≤ 0.3, all Zr1-xNi2+xGa compounds demonstrated superconducting behavior, but no superconductivity was observed in the Zr1+xNi2-xGa alloys for x > 0.2. The magnetization data revealed that all materials in both Zr1+xNi2-xGa and Zr1-xNi2+xGa series exhibited type-II superconductivity. With increasing doping concentration x, the paramagnetic ordering were enhanced in both systems while the superconducting properties were found to weaken. The observations are discussed considering the structural disorders in the systems.

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Discovery of a Superconductor Bi₅O₄S₃Cl Containing the Unique BiS₃ Layer

Yang,

Fan,

Liu

et al. 2023

Advanced Science

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The BiS2‐based layered superconductors with structures similar to those of cuprates and iron‐based superconductors have stimulated much research interest. Here, a new quaternary compound is reported, Bi5O4S3Cl, which crystalizes in a tetragonal structure with P4/mmm (No. 123) space group having alternately stacking unique BiS3 layers and Bi2O2 layers along the c‐axis with a Cl atom located at the center of the unit cell. A superconducting transition above 3 K is observed for both electrical transport and magnetic measurements. Hall resistivity measurements show its multiband character with a conduction dominated by electron‐like charge carriers. The first‐principles calculations exhibit that the semiconducting parent phase Bi5O4S3Cl becomes metallic when sulfur vacancies are introduced, which hints the origin of superconductivity in Bi5O4S3Cl. The findings will inspire the exploration of new BiS‐based superconductors.

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Superconductivity in the Heusler family of intermetallics

Cited by 158 publications

References 31 publications

Phonon anomalies and superconductivity in the Heusler compound YPd2Sn

Phonon anomalies and superconductivity in the Heusler compound YPd2Sn

Superconducting properties of Zr1+xNi2-xGa and Zr1-xNi2+xGa Heusler compounds

Discovery of a Superconductor Bi₅O₄S₃Cl Containing the Unique BiS₃ Layer

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Superconductivity in the Heusler family of intermetallics

Cited by 158 publications

References 31 publications

Phonon anomalies and superconductivity in the Heusler compound YPd2Sn

Phonon anomalies and superconductivity in the Heusler compound YPd2Sn

Superconducting properties of Zr1+xNi2-xGa and Zr1-xNi2+xGa Heusler compounds

Discovery of a Superconductor Bi5O4S3Cl Containing the Unique BiS3 Layer

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Discovery of a Superconductor Bi₅O₄S₃Cl Containing the Unique BiS₃ Layer