Electro-nuclear quantum phase transition in TmVO4
Mark P Zic1,2, Chao Huan3,4, Nicolas Silva3,4
1Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305.
Summary
Hyperfine interactions in TmVO4 crystals influence electronic ferroquadrupole order. Nuclear moments lower the critical field, causing phase boundary back-bending, a phenomenon explained by a mean-field model.
Area of Science:
- Condensed Matter Physics
- Quantum Materials
- Magnetism
Background:
- Hyperfine interactions couple nuclear and electronic spins.
- Understanding these interactions is key to controlling quantum states in materials.
Purpose of the Study:
- Investigate the impact of hyperfine coupling on the electronic ferroquadrupole order in TmVO4 single crystals.
- Explore the field-tuned quantum phase transition influenced by these interactions.
Main Methods:
- Experimental measurements on TmVO4 single crystals.
- Application of a single-ion semiclassical mean-field model.
- Analysis of the effective Hamiltonian.
Main Results:
- Observed a dramatic back-bending of the phase boundary for ferroquadrupole order as temperature decreased.
- The mean-field model accurately described the behavior down to 50 mK.
- Predicted spontaneous nuclear magnetic order mediated by 4f electrons.
Conclusions:
- Hyperfine coupling significantly modifies the electronic ferroquadrupole phase transition in TmVO4.
- The findings suggest a potential electro-nuclear tetracritical point.
- This work provides insights into coupled nuclear-electronic quantum phenomena.
Keywords:
electro-nuclear orderhyperfine interactionnematicityquadrupole orderquantum phase transitionMore Related Videos
11:46Investigation of the Electrophysiological and Thermographic Safety Parameters of Surgical Energy Devices During Thyroid and Parathyroid Surgery in a Porcine Model
Published on: October 13, 2022
09:36Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia
Published on: December 22, 2023
Related Concept Videos
02:31Phase Transitions
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to occupy...
01:21Phase Transitions
A phase transition is the process in which a substance changes from one state of matter to another, like from a solid to a liquid, liquid to gas, or vice versa, at a specific temperature and under given pressure conditions. This change is spontaneous and is affected by alterations in temperature and pressure. These parameters impact the strength of the forces between molecules (intermolecular forces) in the substance.During a phase transition, both the initial and final phases of the substance...
01:24Resting Membrane Potential
The relative difference in electrical charge, or voltage, between the inside and the outside of a cell membrane, is called the membrane potential. It is generated by differences in permeability of the membrane to various ions and the concentrations of these ions across the membrane.
The Inside of a Neuron is More Negative
The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular fluid. The...
The Inside of a Neuron is More Negative
The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular fluid. The...
01:05Atomic Nuclei: Magnetic Resonance
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
01:19Thomson's e/m Experiment
In a beam of charged particles created by a heated cathode, the particles move at different speeds. However, many applications need a beam with uniform particle speeds. An arrangement known as a velocity selector uses electric and magnetic fields to pick particles with a particular speed from the beam.
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...