Related Experiment Video
Updated: Aug 5, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Gapless quantum spin liquid behavior in spin-1/2 triangular-lattice antiferromagnet Ba3CuNb2O9with in-plane
Shobha Gondh1, Manju M Patidar2, Debashish Das3
1School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India.
None:
Quantum spin liquids (QSL) are prototypical examples of ground states with massive many-body entanglement. While an unambiguous realization of this long-sought-after state remains elusive, a growing number of materials candidates keep emerging with varieties of novel and exotic properties. Here, we report a combined experimental and theoretical study of a new antiferromagnet BaCuNbOwhich has an in-plane anisotropic exchange interaction arising from distorted triangular arrangements of magnetic Cu(spin-1/2) ions. We show an unconventional gapless QSL like ground state in this material which does not exhibit any signature of magnetic ordering down to 0.3 K, while a finite Curie-Weiss temperature41 K is evident. The gapless QSL state is supported by a high spin fluctuation, a power-law dependence of magnetic specific heatand a unique scaling of magnetic susceptibility and specific heat with temperature and magnetic field respectively. Ourab-initiosimulation also confirms the anisotropic exchange interaction which can only be explained via superexchange mechanism. While the combined results strongly suggest a random singlet state driven QSL behavior in present material, we strongly believe that the anisotropic exchange interaction has a possible role for this exotic ground state behavior.
More Related Videos
09:00Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
06:53Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
Related Concept Videos
Valence Bond Theory
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
The Pauli Exclusion Principle
Spin–Spin Coupling: One-Bond Coupling
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...
Atomic Nuclei: Nuclear Spin State Overview