skip to main content

Effect of Zn doping on the antiferromagnetism in kagome Cu$_{4-x}$Zn$_x$(OH)$_6$FBr

Feng, Zili ; Wei, Yuan ; Liu, Ran ; Yan, Dayu ; Wang, Yan-Cheng ; Luo, Jianlin ; Senyshyn, Anatoliy ; Cruz, Clarina Dela ; Yi, Wei ; Mei, Jia-Wei ; Meng, Zi Yang ; Shi, Youguo ; Li, Shiliang

Phys. Rev. B 98, 155127 (2018) [Periódico revisado por pares]

Texto completo disponível

Citações Citado por
  • Título:
    Effect of Zn doping on the antiferromagnetism in kagome Cu$_{4-x}$Zn$_x$(OH)$_6$FBr
  • Autor: Feng, Zili ; Wei, Yuan ; Liu, Ran ; Yan, Dayu ; Wang, Yan-Cheng ; Luo, Jianlin ; Senyshyn, Anatoliy ; Cruz, Clarina Dela ; Yi, Wei ; Mei, Jia-Wei ; Meng, Zi Yang ; Shi, Youguo ; Li, Shiliang
  • Assuntos: Condensed Matter - Strongly Correlated Electrons
  • É parte de: Phys. Rev. B 98, 155127 (2018)
  • Descrição: Barlowite Cu$_4$(OH)$_6$FBr shows three-dimensional (3D) long-range antiferromagnetism, which is fully suppressed in Cu$_3$Zn(OH)$_6$FBr with a kagome quantum spin liquid ground state. Here we report systematic studies on the evolution of magnetism in the Cu$_{4-x}$Zn$_x$(OH)$_{6}$FBr system as a function of $x$ to bridge the two limits of Cu$_4$(OH)$_6$FBr ($x$=0) and Cu$_3$Zn(OH)$_6$FBr ($x$=1). Neutron-diffraction measurements reveal a hexagonal-to-orthorhombic structural change with decreasing temperature in the $x$ = 0 sample. While confirming the 3D antiferromagnetic nature of low-temperature magnetism, the magnetic moments on some Cu$^{2+}$ sites on the kagome planes are found to be vanishingly small, suggesting strong frustration already exists in barlowite. Substitution of interlayer Cu$^{2+}$ with Zn$^{2+}$ with gradually increasing $x$ completely suppresses the bulk magnetic order at around $x$ = 0.4, but leaves a local secondary magnetic order up to $x\sim 0.8$ with a slight decrease in its transition temperature. The high-temperature magnetic susceptibility and specific heat measurements further suggest that the intrinsic magnetic properties of kagome spin liquid planes may already appear from $x>0.3$ samples. Our results reveal that the Cu$_{4-x}$Zn$_x$(OH)$_6$FBr may be the long-thought experimental playground for the systematic investigations of the quantum phase transition from a long-range antiferromagnet to a topologically ordered quantum spin liquid. Comment: 9 pages, 6 figures

Buscando em bases de dados remotas. Favor aguardar.