Topological superconductivity in Rashba spin-orbital coupling suppressed monolayer β-Bi2Pd

Tu, Xin-Hai; Liu, Peng-Fei; Yin, Wen; Zhang, Junrong; Zhang, Ping; Wang, Bao-Tian

doi:10.1016/j.mtphys.2022.100674

Cited by 6 publications

(5 citation statements)

References 59 publications

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“…TSMs with bulk superconducting properties are emerged as the materials of interest as these are regarded as the possible candidates to realize topological superconductivity [9][10][11][12][13][14][15][16][17][18][19]. Topological superconductors are considered as the key materials to host Majorana fermions [20,21], while some of the p wave superconductors also show the existence of Majorana bound states inside their vortices [22,23].…”

Section: Introductionmentioning

confidence: 99%

“…BiPd, β-Bi 2 Pd and Sb 2 Pd are also reported to have topological states with bulk superconductivity [15][16][17]. Theoretical calculations made on thin films of β-Bi 2 Pd suggest the same to show topological superconductivity along with Majorana zero modes [18,19], while this feature lacks experimental confirmation. Pb 2 Pd is another similar compound, and its superconducting nature has been known since 1962 [24].…”

Section: Introductionmentioning

confidence: 99%

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Bulk superconductivity and non-trivial band topology analysis of Pb₂Pd

Sharma¹,

Karn²,

Rani³

et al. 2022

Supercond. Sci. Technol.

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In this article, we report single crystal growth of superconducting binary compound Pb2Pd. The crystal is well characterized through X-Ray Diffraction (XRD), Selected Area electron diffraction (SAED), Transmission Electron Microscopy (TEM), Field emission Scanning electron Microscopy (FESEM) and X-Ray Photoelectron spectroscopy (XPS). The bulk superconducting nature of the synthesized crystal is determined through AC susceptibility and magneto-heat capacity measurements. The specific heat jump at superconducting transition suggests Pb2Pd to be a moderately coupled s-wave superconductor. The topological non-trivial character of Pb2Pd is evidenced through bulk electronic band structure and Z2 invariants, which are calculated under the protocols of Density Functional Theory (DFT). Surface states spectrum of Pb2Pd is also studied, which further claims Pb2Pd to have topological non-trivial band structure.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bulk superconductivity and non-trivial band topology analysis of Pb₂Pd

Sharma¹,

Karn²,

Rani³

et al. 2022

Supercond. Sci. Technol.

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“…shows evidence of existence of p wave superconductivity, and also the possible signatures of Majorana zero modes [30,31]. The other members of this family viz.…”

Section: Introductionmentioning

confidence: 90%

“…β-Bi 2 Pd is extensively studied for its topological and superconducting properties [19][20][21]. Monolayer of β-Bi 2 Pd shows evidence of existence of p wave superconductivity, and also the possible signatures of Majorana zero modes [30,31]. The other members of this family viz.…”

Section: Introductionmentioning

confidence: 99%

Sn₂Pd: a possible superconducting material with topological surface states

Sharma¹,

Awana²

2022

J. Phys. D: Appl. Phys.

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In this article, we report the detailed magneto transport measurements of topological semimetal candidate, Sn2Pd. Single crystal of Sn2Pd is synthesized through self-flux method. Phase purity and crystalline morphology are confirmed through powder x-ray diffraction pattern and field emission scanning electron microscopy image. Signatures of superconducting transition are seen in both transport and magneto transport measurements, which are further supported by the AC magnetization studies. Sn2Pd is found to show superconductivity onset at below 2.8 K, but not the zero resistivity down to 2 K. Although, isothermal magneto resistivity measurements below superconducting onset (2.8 K) clearly exhibited superconductor like behavior, but is not observed in heat capacity measurements, indicating the same to be of weak nature. Magneto transport measurements performed in normal state of Sn2Pd show the presence of weak antilocalization effect, which is confirmed by modelling of low field magneto-conductivity through Hikami Larkin Nagaoka formalism. Here, it is worth mentioning that the present article is the first report on magneto transport measurements of Sn2Pd, which show the same to be a topological material with weak superconducting phase below around 2.8 K.

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“…In condensed matter physics, quantum states of superconductivity 7 and charge density waves (CDW) 8 in 2D materials are fascinating subjects. In recent years, due to the development of the low-dimensional nanostructure technology, such as chemical vapor deposition (CVD) 9 and molecular beam epitaxy, 10 superconductivity has been observed in ultrathin films of Mo 2 C 9,11,12 and Nb 2 C MXenes.…”

Section: Introductionmentioning

confidence: 99%