Emergence of superconductivity on the border of antiferromagnetic order in RbMn6Bi5 under high pressure: A new family of Mn-based superconductors

Abstract

The advances in the field of unconventional superconductivity are largely driven by the discovery of novel superconducting systems. Here we report on the discovery of superconductivity on the border of antiferromagnetic order in a quasi-one-dimensional RbMn6Bi5 via measurements of resistivity and magnetic susceptibility under high pressures. With increasing pressure, its antiferromagnetic transition with TN = 83 K at ambient pressure is first enhanced moderately and then suppressed completely at a critical pressure of Pc = 13 GPa, around which bulk superconductivity emerges and exhibits a dome-like Tc(P) with a maximal Tc_onset = 9.5 K at about 15 GPa. Its temperature-pressure phase diagram resembles those of many magnetism-mediated superconducting systems. In addition, the superconducting state around Pc is characterized by a large upper critical field μ0Hc2(0) exceeding the Pauli limit, elaborating a possible unconventional paring mechanism. The present study, together with our recent work on KMn6Bi5 (Tcmax = 9.3 K), makes AMn6Bi5 (A= Alkali metal) a new family of Mn-based superconductors with relatively high Tc.

References in corpus (10)

• Quantum Criticality in Heavy Fermion Metals
• Very High Field Two-Band Superconductivity in LaFeAsO_0.89F_0.11
• Double superconducting dome and triple enhancement of Tc in the kagome superconductor CsV3Sb5 under high pressure
• Superconductivity in quasi-one-dimensional K${}_2$Cr${}_3$As${}_3$ with significant electron correlations
• Pressure induced superconductivity on the border of magnetic order in MnP
• Spin-Triplet Superconductivity in K2Cr3As3
• Pressure-induced superconductivity up to 9 K in the quasi-one-dimensional KMn6Bi5
• Pressure induced superconductivity in MnSe
• A new quasi-one-dimensional superconductor parent compound NaMn${}_6$Bi${}_5$ with lower antiferromagnetic transition temperatures
• Tuning interchain ferromagnetic instability in A2Cr3As3 ternary arsenides by chemical pressure and uniaxial strain

Cited by in corpus (8)

• Flipping of antiferromagnetic to superconducting states in pressurized quasi-one-dimensional manganese-based compounds
• Superconductivity up to 14.2 K in MnB${}_4$ under pressure
• Spin and charge density waves in the quasi-one-dimensional KMn6Bi5
• Pressure induced antiferromagnetic-tetragonal to nonmagnetic-collapse-tetragonal insulator-metal transition in ThMnAsN
• Record high superconducting transition temperature in Ti${}_{1-x}$Mn${}_x$ alloy with rich magnetic element Mn
• Spin fluctuations in the 112-type iron-based superconductor Ca${}_{0.82}$La${}_{0.18}$Fe${}_{0.96}$Ni${}_{0.04}$As${}_2$
• Unusual antiferromagnetic order and fluctuations in RbMn${}_6$Bi${}_5$
• Crystal growth and characterization of a hole-doped iron-based superconductor Ba(Fe${}_{0.875}$Ti${}_{0.125}$)${}_2$As${}_2$