Experimental Verification of the Gapless Point in the $S$=1 Antiferromagnetic Bond Alternating Chain

Abstract

Susceptibility and high field magnetization measurements have been performed on powder samples of an $S$=1 bond alternating chain compound [\{Ni(333-tet)($\mu$-N${}_3$)\}${}_n$](ClO${}_4$)${}_n$ (333-tet=tetraamine N,N'-bis(3-aminopropyl)-1,3-propanediamine). As the temperature is decreased, the susceptibility exhibits a round maximum at around 120 K and decreases gradually down to 10 K, and then falls down rapidly with a logarithmic curvature which is behavior of the susceptibility of a gapless or a nearly gapless antiferromagnetic chain. Magnetization up to 50 T at 1.4 K shows no or a very small gap in this compound. We have carried out numerical calculations for the $S$=1 antiferromagnetic bond alternating chain with various alternating ratios $\alpha$ and obtained a very good agreement between experiments and calculations for $\alpha$=0.6. We verify experimentally that the gapless point exists around $\alpha$=0.6.

12 pages, 4 Postscript figures, uses REVTEX

References in corpus (10)

• Surprises on the Way from 1D to 2D Quantum Magnets: the Novel Ladder Materials
• Magnetization plateaus in spin chains: ``Haldane gap'' for half-integer spins
• Susceptibility of the Spin 1/2 Heisenberg Antiferromagnetic Chain
• Cluster Algorithm for Vertex Models
• Numerical Study of the $S=1$ Antiferrromagnetic Spin Chain with Bond Alternation
• Phase Diagram of $S=1$ Bond-Alternating XXZ chains
• Magnetization Process of One-Dimensional Quantum Antiferromagnet: The Product Wavefunction Renormalization Group Approach
• Dual Monte Carlo and Cluster Algorithms
• Thermodynamic Density Matrix renormalization Group Study of the Magnetic Susceptibility of Half-integer Quantum Spin Chains
• Low-temperature properties of the spin-1 antiferromagnetic Heisenberg chain with bond-alternation

Cited by in corpus (25)

• The Loop Algorithm
• Ground-State Phase Diagram of Quantum Heisenberg Antiferromagnets on the Anisotropic Dimerized Square Lattice
• Magnetic Phase Diagram of the Breathing Pyrochlore Antiferromagnet LiGa1-xInxCr4O8
• Specific heat of an S=1/2 Heisenberg ladder compound Cu${}_2$(C${}_5$H${}_{12}$N${}_2$)${}_2$Cl${}_4$ under magnetic fields
• Evidence for the singlet-dimer ground state in an S = 1 antiferromag netic bond alternating chain
• Anisotropic Antiferromagnetic Spin Chains in a Transverse Field: Reentrant Behavior of the Staggered Magnetization
• Critical exponent in the magnetization curve of quantum spin chains
• Non-Linear Sigma Model for Inhomogeneous Spin Chains
• Breakdown of the magnetization plateau of the S=1/2 ferromagnetic-ferromagnetic-antiferromagnetic trimerized spin chain with anisotropy
• Phase Diagrams of Mixed Spin Chains with Period 4 by the Nonlinear $\sigma$ Model
• Exotic criticality in the dimerized spin-1 $XXZ$ chain with single-ion anisotropy
• Product Wave Function Renormalization Group: construction from the matrix product point of view
• Magnetization process for a quasi-one-dimensional S=1 antiferromagnet
• A Classical Background for the Wave Function Prediction in the Infinite System DMRG Method
• Two-Site shift Product Wave Function Renormalization Group Method Applied to Quantum Systems
• Dynamical properties of S=1 bond-alternating Heisenberg chains in transverse magnetic fields
• Dynamical structure factors of S=1 bond-alternating Heisenberg chains
• Effects of Randomness on the Field-Induced Phase Transition in the S=1 Bond-Alternating Spin Chain NTENP
• Quantum criticality in dimerised anisotropic spin-1 chains
• Re-Entrant Quantum Phase Transitions in Antiferromagnetic Spin-1 Ladders
• Field theory analysis of S=1 antiferromagnetic bond-alternating chains in the dimer phase
• Mass ratio of elementary excitations in frustrated antiferromagnetic chains with dimerization
• Two topological phases in exchange alternating spin-1 nanographene chains
• Detecting underlying symmetry-protected topological phases via strange correlators and edge engineering
• Monte Carlo determination of the low-energy constants for a two-dimensional spin-1 Heisenberg model with spatial anisotropy