Superconducting and normal-state properties of the noncentrosymmetric superconductor Re6Zr

Abstract

We systematically investigate the normal and superconducting properties of non-centrosymmetric Re${}_6$Zr using magnetization, heat capacity, and electrical resistivity measurements. Resistivity measurements indicate Re${}_6$Zr has poor metallic behavior and is dominated by disorder. Re${}_6$Zr undergoes a superconducting transition at $T_{\mathrm{c}}=\left(6.75\pm 0.05\right)$ K. Magnetization measurements give a lower critical field, ${\mu }_0{H}_{c1}=\left(10.3\pm 0.1\right)$ mT. The Werthamer-Helfand-Hohenberg model is used to approximate the upper critical field ${\mu }_0{H}_{c2}=\left(11.2\pm 0.2\right)$ T which is close to the Pauli limiting field of 12.35 T and which could indicate singlet-triplet mixing. However, low-temperature specific-heat data suggest that Re${}_6$Zr is an isotropic, fully gapped s-wave superconductor with enhanced electron-phonon coupling. Unusual flux pinning resulting in a peak effect is observed in the magnetization data, indicating an unconventional vortex state.

arXiv comment11 pages, 7 figures, 2 tables

References in corpus (31)

• Heavy fermion superconductivity and magnetic order in non-centrosymmetric $CeP{t}_{3}Si$
• Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4
• Superconducting 2D system with lifted spin degeneracy: Mixed singlet-triplet state
• Enhancement of the upper critical field by nonmagnetic impurities in dirty two-gap superconductors
• High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State
• S-wave/spin-triplet order in superconductors without inversion symmetry: Li${}_2$Pd${}_3$B and Li${}_2$Pt${}_3$B
• Evidence for time-reversal symmetry breaking in the non-centrosymmetric superconductor LaNiC${}_2$
• Time-Reversal Symmetry-Breaking Superconductivity in Heavy Fermion PrOs4Sb12 detected by Muon Spin Relaxation
• Spin Triplet Superconducting State due to Broken Inversion Symmetry in Li_2Pt_3B
• Superconducting Topological Surface States in Non-centrosymmetric Bulk Superconductor PbTaSe2
• Observation of Time-Reversal Symmetry Breaking in the Non-Centrosymmetric Superconductor Re6Zr
• Non-unitary triplet pairing in the centrosymmetric superconductor LaNiGa${}_2$
• Structure and physical properties of the noncentrosymmetric superconductor Mo3Al2C
• Evidence for time-reversal symmetry breaking in superconducting PrPt4Ge12
• Dirac Surface States and Nature of Superconductivity in Noncentrosymmetric BiPd
• Physical properties of the noncentrosymmetric superconductor Mg_10Ir_19B_16
• Specific heat and $\mu$SR study on the noncentrosymmetric superconductor LaRhSi3
• Absence of zero field muon spin relaxation induced by superconductivity in the B phase of UPt${}_3$
• Physical properties of the non-centrosymmetric superconductor Nb0.18Re0.82
• Relativistic analysis of the pairing symmetry of the noncentrosymmetric superconductor LaNiC${}_2$
• Broken time-reversal symmetry probed by muon spin relaxation in the caged type superconductor Lu${}_5$Rh${}_6$Sn${}_{18}$
• Evidence of nodal gap structure in the non-centrosymmetric superconductor Y2C3
• Crystallographic and superconducting properties of the fully-gapped noncentrosymmetric 5d-electron superconductors CaMSi3 (M=Ir, Pt)
• Superconducting Properties of the Non-Centrosymmetric Superconductor Re6Hf
• 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
• Structure and superconductivity of two different phases of Re3W
• BCS-like superconductivity in the noncentrosymmetric compounds Nb${}_x$Re${}_{1-x}$
• Complex superconductivity in the noncentrosymmetric compound Re${}_6$Zr
• Suppression of time reversal symmetry breaking superconductivity in Pr(Os,Ru)_4Sb_12 and (Pr,La)Os_4Sb_12
• Full-gap superconductivity in non-centrosymmetric Re${}_6$Zr, Re${}_{27}$Zr${}_5$ and Re${}_{24}$Zr${}_5$
• Anomalous thermodynamic power laws near topological transitions in nodal superconductors

Cited by in corpus (25)

• Time-reversal symmetry breaking in Re-based superconductors
• Nodeless superconductivity and time-reversal symmetry breaking in the noncentrosymmetric superconductor Re24Ti5
• Time Reversal Symmetry Breaking in noncentrosymmetric superconductor Re6Ti
• Study of the superconducting ground state of topological superconducting candidates Ti${}_3$X (X = Ir, Sb)
• Structure and superconductivity in the binary Re${}_{1-x}$Mo${}_x$ alloys
• Boron based new high entropy alloy superconductor Mo0.11W0.11V0.11Re0.34B0.33
• Fully-gapped superconductivity in single crystals of noncentrosymmetric Re${}_6$Zr with broken time-reversal symmetry
• Unconventional superconducting properties of noncentrosymmetric Re5.5Ta
• Investigations of the superconducting ground state of Zr${}_3$Ir: Introducing a new noncentrosymmetric superconductor
• Quantifying nonadiabaticity in major families of superconductors
• Time-reversal symmetry breaking in Re-based superconductors: Recent developments
• Superconducting properties of the non-centrosymmetric Superconductors TaXSi (X= Re, Ru)
• Probing the superconducting ground state of noncentrosymmetric high entropy alloys using muon-spin rotation and relaxation
• Superconducting properties of the noncentrosymmetric superconductor TaOs
• Evidence for the coexistence of time-reversal symmetry breaking and Bardeen-Cooper-Schrieffer-like superconductivity in La${}_7$Pd${}_3$
• Superconducting ground state of nonsymmorphic superconducting compound Zr${}_2$Ir
• Quantum muon diffusion and the preservation of time-reversal symmetry in the superconducting state of type-I rhenium
• Superconducting ground state study of valence skip compound AgSnSe${}_2$
• Superconducting and structural properties of non-centrosymmetric Re6Hf superconductor under high pressure
• Superconductivity with high upper critical field in Ta-Hf Alloys
• Superconductivity in Bi based Bi2PdPt
• Pressure-induced volumetric negative thermal expansion in CoZr2 superconductor
• Anisotropic superconductivity and unusually robust electronic critical field in single crystal La${}_7$Ir${}_3$
• Superconducting properties of van der Waals metal-rich subsulfide Nb${}_{1.7}$Ta${}_{3.3}$S${}_2$
• NbReSi: A Noncentrosymetric Superconductor with Large Upper Critical Field