Berezinskii-Kosterlitz-Thouless Type Scenario in Molecular Spin Liquid $A$Cr${}_2$O${}_4$

Abstract

The spin relaxation in chromium spinel oxides $A$Cr${}_2$O${}_4$ ($A=$ Mg, Zn, Cd) is investigated in the paramagnetic regime by electron spin resonance (ESR). The temperature dependence of the ESR linewidth indicates an unconventional spin-relaxation behavior, similar to spin-spin relaxation in the two-dimensional (2D) chromium-oxide triangular lattice antiferromagnets. The data can be described in terms of a generalized Berezinskii-Kosterlitz-Thouless (BKT) type scenario for 2D systems with additional internal symmetries. Based on the characteristic exponents obtained from the evaluation of the ESR linewidth, short-range order with a hidden internal symmetry is suggested.

arXiv comment7 pages, 4 figures

References in corpus (17)

• Emergent excitations in a geometrically frustrated magnet
• Local spin resonance and spin-Peierls-like phase transition in a geometrically frustrated antiferromagnet
• Order by distortion and string modes in pyrochlore antiferromagnet
• Statics and dynamics of an incommensurate spin order in a geometrically frustrated antiferromagnet CdCr${}_2$O${}_4$
• Electronic band structure and exchange coupling constants in ACr2X4 spinels
• Unconventional Dynamics in Triangular Heisenberg Antiferromagnet NaCrO2
• Two Dimensional Kagome Correlations and Field Induced Order in the Ferromagnetic XY Pyrochlore Yb2Ti2O7
• Anisotropic Exchange in LiCuVO${}_4$ probed by ESR
• Molecular spin resonance in the geometrically frustrated MgCr2O4 magnet by inelastic neutron scattering
• Emergence of highly degenerate excited states in frustrated magnet MgCr${}_2$O${}_4$
• Molecular spin-orbit excitations in the J_eff = 1/2 frustrated spinel GeCo${}_2$O${}_4$
• Elastic Instabilities within Antiferromagnetically Ordered Phase in the Orbitally-Frustrated Spinel GeCo${}_2$O${}_4$
• Observation of elastic anomalies driven by coexisting dynamical spin Jahn-Teller effect and dynamical molecular spin state in paramagnetic phase of the frustrated MgCr${}_2$O${}_4$$
• Molecular spin-liquid state in spin-3/2 frustrated spinel HgCr${}_2$O${}_4$
• Spin Singlet State in Heptamers Emerging in Spinel Oxide AlV${}_2$O${}_4$
• Neutron scattering study on spin correlations and fluctuations in the transition-metal-based magnetic quasicrystal Zn-Fe-Sc
• Topological phase transitions in two-dimensional systems with internal symmetries

Cited by in corpus (4)

• Quantum critical Bose gas in the two-dimensional limit in the honeycomb antiferromagnet YbCl${}_3$ under magnetic fields
• 2D correlations in the van der Waals ferromagnet CrBr${}_3$ using high frequency electron spin resonance spectroscopy
• Unexpected Effectiveness of Berezinskii-Kosterlitz-Thouless Description of Electron Paramagnetic Resonance Linewidth Behaviour in the 3-Dimensional Manganite Bi${}_{0.5}$Sr${}_{0.5}$Mn${}_{0.9}$Cr${}_{0.1}$O${}_3$
• On the complexity of spinels: Magnetic, electronic, and polar ground states