Unconventional superconductivity in the topological semimetal MoP: Evidence from first-principles calculated electron–phonon coupling

Chen, Jianyong

doi:10.1016/j.commatsci.2019.109466

Cited by 6 publications

(6 citation statements)

References 45 publications

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“…S5). According to the calculation, the E mode is Raman active due to the absence of inversion symmetry in MoP crystal [28]. Raman spectrum of MoP single crystals is similar to that in the reported study [29].…”

Section: Resultssupporting

confidence: 81%

Growth of 2D MoP single crystals on liquid metals by chemical vapor deposition

et al. 2020

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Section: Resultssupporting

confidence: 81%

Growth of 2D MoP single crystals on liquid metals by chemical vapor deposition

et al. 2020

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“…[ 30 ] We can understand this distinction by looking at their spatial charge at the Fermi level. The partial charges near Fermi level in MoP locate closely around Mo atoms (see Figure 2c in the study by Chen [ 30 ] ), resulting in a vanishing deformation potential. As mentioned earlier, the electronic states at the Fermi level of WN mainly comes from W d orbitals and the phonons dominating EPC also originate from W atoms.…”

Section: Resultsmentioning

confidence: 99%

“…[ 15 ] However, our previous calculation demonstrates that its total λ is only 0.28. [ 30 ] We can understand this distinction by looking at their spatial charge at the Fermi level. The partial charges near Fermi level in MoP locate closely around Mo atoms (see Figure 2c in the study by Chen [ 30 ] ), resulting in a vanishing deformation potential.…”

Section: Resultsmentioning

confidence: 99%

“…The N(E F ) (5.56 states/spin/Ry/cell) of bulk MoP is comparable with that (6.24 states/spin/Ry/cell) of bulk WN and its Fermi surface also displays strong nesting along Γ-K and Γ-M. [15] However, our previous calculation demonstrates that its total λ is only 0.28. [30] We can understand this distinction by looking at their spatial charge at the Fermi level. The partial charges near Fermi level in MoP locate closely around Mo atoms (see Figure 2c in the study by Chen [30] ), resulting in a vanishing deformation potential.…”

Section: Resultsmentioning

confidence: 99%

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Strong Electron–Phonon Coupling in 3D WN and Coexistence of Intrinsic Superconductivity and Topological Nodal Line in Its 2D Limit

Chen

Gao

2021

Physica Rapid Research Ltrs

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The electron–phonon coupling (EPC) and superconductivity in three‐component‐fermion materials WN, WC, and TaN are systematically investigated using first‐principles calculations. The EPC strength in pristine or pressurized WC and TaN are found to be negligibly weak (<0.2), but can be enhanced significantly by electron doping, and the predicted transition temperatures (Tc) reach the values observed in experiments (≈4 K), demonstrating the vital role of charge doping in the formation of superconductivity. Surprisingly, pristine WN has strong EPC due to a synergistic effect of strong Fermi nesting and large deformation potential and behaves as a good superconductor with Tc of 31 K. Going down from 3D to 2D, WN thin film (i.e., monolayer W3N4) is also predicted to be an intrinsic superconductor with Tc of 11 K. Most importantly, monolayer W3N4 hosts nodal lines that are robust against spin–orbit coupling (SOC), close to the Fermi level and apart from other trivial bands, which are scarce in real materials. The coexistence of high‐transition‐temperature superconductivity and topological states in 3D and 2D WN render them promising platforms for realizing topological superconductivity.

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“…where τ is the relaxation time. Hence, substituting equation ( 19) into equation ( 18) in the absence of magnetic field gives [19,20]…”

Section: Heat Current Density (J Q )mentioning

confidence: 99%

Thermal and Electronic Conductivity in Normal and Superconducting Erbium Nickel Borocarbide (ErNi2B2C)

Tesfaye

2022

Advances in Materials Science and Engineering

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In this work, the total electronic energy, the electronic thermal conductivity, and the heat capacity of erbium nickel borocarbide, ErNi2B2C, in the normal and superconducting states are calculated using Boltzmann transport equations (BTEs) and energy dispersion relation function. Results from the electronic thermal conductivity versus temperature (T) are presented. From the result, electrical and thermal conductivity at low temperature obey the Wiedemann–Franz law. Moreover, at the normal state, the electronic thermal conductivity of ErNi2B2C is directly proportional to the temperature (T) and reaches its maximum (kink) at the transition temperature, Tc. After the superconducting transition temperature, the electronic thermal conductivity begin to decrease. The drop in electronic thermal conductivity beyond its peak (kink) value is due to the formation of energy gap and the absence of Cooper pairs.

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Unconventional superconductivity in the topological semimetal MoP: Evidence from first-principles calculated electron–phonon coupling

Cited by 6 publications

References 45 publications

Growth of 2D MoP single crystals on liquid metals by chemical vapor deposition

Growth of 2D MoP single crystals on liquid metals by chemical vapor deposition

Strong Electron–Phonon Coupling in 3D WN and Coexistence of Intrinsic Superconductivity and Topological Nodal Line in Its 2D Limit

Thermal and Electronic Conductivity in Normal and Superconducting Erbium Nickel Borocarbide (ErNi2B2C)

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