Superconductors with noncentrosymmetric crystal structures

Naskar, Moumita; Mishra, Prabuddha Kant; Ash, Soumen; Ganguli, Ashok K.

doi:10.1007/s12034-021-02587-z

Cited by 8 publications

(2 citation statements)

References 167 publications

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“…Recently, noncentrosymmetric superconductors (NCSs) have received great attention for which NCSs can hold a mixed pairing state of spin-singlet and spin-triplet due to the asymmetric spin–orbit coupling (ASOC) effect during inversion symmetry break. ,− Fortunately, Nb 2 B 5 is predicted to be a new NCS that have a relatively high T C in the NCSs family, for example, the T C of some well-known NCSs like PbTaSe 2 , CePt 3 Si, LaNiC 2 , and Li 2 Pt 3 B are 3.8, 0.7, 2.8, and 2.7 K, respectively, while Nb 3 B 7 is a centrosymmetric superconductor. We then use vasp2trace and Check Topological Mat. , to roughly judge the topological catalog of Nb-B binaries, and the results are listed in Table S3.…”

Section: Resultsmentioning

confidence: 99%

Scanning Intrinsic Superconductivity and the Spin Hall Effect in Niobium Borides

Song

Qin

Chen

et al. 2023

Crystal Growth & Design

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Although niobium borides have been extensively studied on their mechanical properties, a systematic investigation on their potential metastable phases, superconducting excitations, and spin Hall effects (SHE) is still lacking. Herein, we carry out a global structure search in the Nb-B system based on the evolutionary algorithm and density functional theory. Thermodynamical, dynamical, mechanical, and quasiharmonic approximation investigations unveil four new phases, Nb 3 B 5 , Nb 2 B 5 , Nb 3 B 7 , and Nb 5 B 4 , which are promising candidates for experimental preparations. Moreover, the superconducting transitions of all Nb-B compounds are performed from electron−phonon calculations. In addition, all Nb-B compounds are predicted to be topologically nontrivial. More intriguingly, Nb 2 B 5 is unveiled as a promising noncentrosymmetric superconductor to explore topological superconducting excitation. Furthermore, nonzero spin Hall conductivity (SHC) tensor elements of all Nb-B compounds are predicted, and NbB is predicted to own a maximal SHC value of 320 (ℏ/e) (S/cm) among all Nb-B compounds. Our theoretical results fill in the gap on superconducting and SHC parameters of Nb-B binaries, demonstrating that Nb-B binaries are a potential choice to explore superconducting excitations and topological states and to investigate the SHE.

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Section: Resultsmentioning

confidence: 99%

Scanning Intrinsic Superconductivity and the Spin Hall Effect in Niobium Borides

Song

Qin

Chen

et al. 2023

Crystal Growth & Design

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“…In recent years, there has been a growing interest in noncentrosymmetric superconductors (NCSs), which can be defined as a type of superconductor that lacks an inversion center in the crystal structure. − One significant effect in NCSs is the antisymmetric spin–orbit coupling (ASOC), which allows for the mixed paring of spin-singlet and spin-triplet states under superconducting transition temperatures ( T c ), i.e., the (s + p)-wave paring. ,, These unconventional excitations make the existence of the Majorana zero modes or Majorana corner modes possible, which are treated as promising cornerstone that can be manipulated to realize the fault-tolerant topological quantum computations. − In addition, the presence of these mixed pairing can go beyond the conventional Bardeen–Cooper–Schrieffer (BCS) frame, displaying distinctive characteristics, which can lead to some fascinating properties such as nodal superconducting gaps , and anisotropic upper critical fields that surpass the Pauli limit …”

Section: Introductionmentioning

confidence: 99%

High-Throughput Computational Screening and Design of CaPtAs-like Equiatomic Ternary Noncentrosymmetric Superconductors

Song,

Qin,

Shi

et al. 2023

J. Phys. Chem. C

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Noncentrosymmetric superconductors (NCSs) are promising candidates for investigating spontaneous time-reversal symmetry breaking and topological superconductivity. This study aims to present a computational materials discovery and design process for developing CaPtAs-like NCSs. Through a comprehensive screening based on first-principles calculations, the range of CaPtAs-like materials is expanded to 13 compounds with superior stabilities, thereby indicating a high likelihood of synthesis. Based on the symmetry indicators diagnosis, SrPtAs, NaPtSi, and SrPtP were screened out as good candidates for investigating nodal superconductivity. Moreover, KPtP, CaRhAs, and CaPtSi were proposed as possible topological superconductor candidates. This investigation serves to aid in the design and expansion of the viable phase space for CaPtAs-like NCSs, and this screening framework may be extended to other NCS systems.

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Effect of Pd on the superconductivity in non-centrosymmetric $$\hbox {Mo}_{3}\hbox {Al}_{2-{x}}\hbox {Pd}_{x}\hbox {C}$$ alloys, with x = 0.00, 0.05 and 0.10

Olicón

Castro²,

Morales³

2022

Appl. Phys. A

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Superconductors with noncentrosymmetric crystal structures

Cited by 8 publications

References 167 publications

Scanning Intrinsic Superconductivity and the Spin Hall Effect in Niobium Borides

Scanning Intrinsic Superconductivity and the Spin Hall Effect in Niobium Borides

High-Throughput Computational Screening and Design of CaPtAs-like Equiatomic Ternary Noncentrosymmetric Superconductors

Effect of Pd on the superconductivity in non-centrosymmetric $$\hbox {Mo}_{3}\hbox {Al}_{2-{x}}\hbox {Pd}_{x}\hbox {C}$$ alloys, with x = 0.00, 0.05 and 0.10

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