Phonon anomaly and anisotropic superconducting gap in non-centrosymmetric Li2(Pd1-xPtx)3B

Abstract

We report the systematic investigation of the specific heat of the noncentrosymmetric supercon- ductor Li2(Pd1-xPtx)3B as a function of x. There is a large deviation of the phononic specific heat from the conventional Debye specific heat for Pt-rich samples. In contrast with the fully-gapped con- ventional behavior for small x, a power-law temperature dependence of the electronic specific heat is observed even at x = 0.5. This results manifest a strongly-anisotropic or nodal superconducting gap even at x = 0.5 and a nodal superconducting gap for x >~ 0.9.

4 pages, 4 figures

References in corpus (7)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Non-Abelian Topological Order in S-Wave Superfluids of Ultracold Fermionic Atoms
• Non-Abelian Topological Orders and Majorana Fermions in Spin-Singlet Superconductors
• Spin Triplet Superconducting State due to Broken Inversion Symmetry in Li_2Pt_3B
• Crystal Symmetry, Electron-Phonon Coupling, and Superconducting Tendencies in Li${}_2$Pd${}_3$B and Li${}_2$Pt${}_3$B
• Abrupt enhancement of non-centrosymmetry and appearance of the spin-triplet superconducting state in Li_2(Pd_{1-x}Pt_{x})_3B beyond x=0.8
• Electronic Structure of Noncentrosymmetric Superconductor Li${}_2$(Pd${}_x$Pt${}_{1-x}$3)B Studied by Photoemission Spectroscopy

Cited by in corpus (13)

• Superconductivity and spin-orbit coupling in non-centrosymmetric materials: a review
• Topological surface states in nodal superconductors
• Stability of flat-band edge states in topological superconductors without inversion center
• Superconductivity induced by fluctuations of momentum-based multipoles
• Superconducting properties of the non-centrosymmetric Superconductors TaXSi (X= Re, Ru)
• The Pairing of Spin-orbit Coupled Fermi Gas in Optical Lattice
• Majorana vortex-bound states in three-dimensional nodal noncentrosymmetric superconductors
• Topological Superconductivity in Multifold Fermion Metals
• Surface instability in nodal noncentrosymmetric superconductors
• Strong antisymmetric spin-orbit coupling and superconducting properties: The case of noncentrosymmetric LaPtSi
• ${}^{181}$Ta Nuclear quadrupole resonance study of non-centrosymmetric superconductor PbTaSe${}_2$
• Weakly Anisotropic Noncentrosymmetric Superconductors with Radial Line Nodes and Thermodynamical Anomalies
• Anisotropic Physical Properties of the Kondo Semimetal CeCu${}_{1.11}$As${}_2$