NMR characteristics in noncentrosymmetric Mo<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>Al<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>C

Kuo, C. N.; Liu, H. F.; Lue, Chin‐Shan

doi:10.1103/physrevb.85.052501

Cited by 15 publications

(19 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…. etc, [5][6][7][8][9][10][11][12][13][14] have been reported to possess noncentrosymmetric characteristics. Among these rare-earth and transition metal based noncentrosymmetric superconductors, the d-electron systems are more suitable for exploring the issue of inversion symmetry breaking because the strong electron correlations in f-electron containing materials usually complicate the superconducting properties.…”

Section: Introductionmentioning

confidence: 99%

Investigation of normal and superconducting states in noncentrosymmetric Re₂₄Ti₅

Lue¹,

Liu²,

Kuo³

et al. 2013

Supercond. Sci. Technol.

View full text Add to dashboard Cite

We report a detailed characterization of the noncentrosymmetric superconductor Re 24 Ti 5 using powder x-ray diffraction (XRD), magnetic susceptibility, electrical resistivity, thermal conductivity, Seebeck coefficient, and specific heat measurements. Rietveld refinement of powder XRD data confirms that Re 24 Ti 5 crystallizes in the α-Mn structure. All measured quantities demonstrate a bulk superconducting transition at T c = 5.8 K. Our low-temperature specific heat data measured down to 0.5 K yield a Sommerfeld coefficient γ = 111.8 mJ mol −1 K −2 , which implies a high density of states at the Fermi level. Moreover, the electronic specific heat in the superconducting state was found to obey a typical s-wave expression, revealing a single gap /k B = 10.6 K. This value gives a ratio of 2 /k B T c = 3.68, higher than the value of 3.5 predicted from BCS theory. On this basis, we conclude that the noncentrosymmetric Re 24 Ti 5 compound can be characterized as a moderately coupled BCS-type superconductor. Furthermore, the obtained parameters from the present study of Re 24 Ti 5 were compared to those of the isostructural compound Re 23.8 Nb 5.2 , indicating the similarity between both systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigation of normal and superconducting states in noncentrosymmetric Re₂₄Ti₅

Lue¹,

Liu²,

Kuo³

et al. 2013

Supercond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…[6][7][8][9][10] The difference was explained by the peculiar crystal structure distortion as to increase the extent of inversionsymmetry breaking in Li 2 Pt 3 B.…”

Section: 5mentioning

confidence: 99%

Spin-singlet superconductivity with a full gap in locally noncentrosymmetric SrPtAs

et al. 2014

View full text Add to dashboard Cite

We report 195 Pt-NMR and 75 As-NQR measurements for the locally non-centrosymmetric superconductor SrPtAs where the As-Pt layer breaks inversion symmetry while globally the compound is centrosymmetric. The nuclear spin lattice relaxation rate 1/T 1 shows a well-defined coherence peak below T c and decreases exponentially at low temperatures. The spin susceptibility measured by the Knight shift also decreases below T c down to T < T c /6. These data together with the penetration depth obtained from the NMR spectra can be consistently explained by assuming a spin-singlet superconducting state with a full gap. Our results suggest that the spin-orbit coupling due to the local inversion-breaking is not large enough to bring about an exotic superconducting state, or the inter-layer hopping interaction is larger than the spin-orbit coupling.

show abstract

“…Our arguments could also be a possible explanation to reconcile the conflict on whether there is a CDW in the Mo 3 Al 2 C [26,27]. It has been argued that the sudden change in the electronic density of states is due to the Fermi surface nesting along the CDW nesting vector along with the (1, 1, 1) direction [26].…”

Section: Application To Real Materialsmentioning

confidence: 68%

“…It has been argued that the sudden change in the electronic density of states is due to the Fermi surface nesting along the CDW nesting vector along with the (1, 1, 1) direction [26]. However, it is also reported that there is no sign of the semimetal to insulator transition in the Mo 3 Al 2 C [27]. Here, we examine the band structure of the Mo 3 Al 2 C without including SOC.…”

Section: Application To Real Materialsmentioning

confidence: 95%

Relativistic horizon of interacting Weyl fermions in condensed matter systems

Chiu¹,

Chang²,

Macam³

et al. 2022

Preprint

View full text Add to dashboard Cite

The intersections of topology, geometry and strong correlations offer many opportunities for exotic quantum phases to emerge in condensed matter systems. Weyl fermions, in particular, provide an ideal platform for exploring the dynamical instabilities of single-particle physics under interactions. Despite its fundamental role in relativistic field theory, the concept of causality and the associated spacetime light cone and event horizon has not been considered in connection with interacting Weyl fermionic excitations in quantum matter. Here, by using charge-density wave (CDW) as an example, we unveil the behavior of interacting Weyl fermions and show that a Weyl fermion in a system can open a band gap by interacting only with other Weyl fermions that lie within its energy-momentum dispersion cone. In this sense, causal connections or interactions are only possible within overlapping dispersion cones and each dispersion cone thus constitutes a solid-state analogue of the more conventional 'event horizon' of high-energy physics. Our study provides a universal framework for considering interacting relativistic quasiparticles in condensed matter by separating them into energy-like and momentum-like relationships in analogy with the time-like and space-like events in high-energy physics. Finally, we consider two different candidate materials for hosting the Weyl CDW phase: (TaSe 4 ) 2 I and Mo 3 Al 2 C. Our study greatly enriches the phenomenology and unveils new connections between condensed matter and high-energy physics.

show abstract

NMR characteristics in noncentrosymmetric Mo3Al2C

Cited by 15 publications

References 26 publications

Investigation of normal and superconducting states in noncentrosymmetric Re₂₄Ti₅

Investigation of normal and superconducting states in noncentrosymmetric Re₂₄Ti₅

Spin-singlet superconductivity with a full gap in locally noncentrosymmetric SrPtAs

Relativistic horizon of interacting Weyl fermions in condensed matter systems

Contact Info

Product

Resources

About

NMR characteristics in noncentrosymmetric Mo3Al2C

Cited by 15 publications

References 26 publications

Investigation of normal and superconducting states in noncentrosymmetric Re24Ti5

Investigation of normal and superconducting states in noncentrosymmetric Re24Ti5

Spin-singlet superconductivity with a full gap in locally noncentrosymmetric SrPtAs

Relativistic horizon of interacting Weyl fermions in condensed matter systems

Contact Info

Product

Resources

About

Investigation of normal and superconducting states in noncentrosymmetric Re₂₄Ti₅

Investigation of normal and superconducting states in noncentrosymmetric Re₂₄Ti₅