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.
- TmVO4 exhibits an electronic ferroquadrupole ordered ground state.
- Quantum phase transitions are sensitive to competing interactions.
Purpose of the Study:
- Investigate the impact of hyperfine coupling on the electronic ferroquadrupole order in TmVO4.
- Characterize the field-tuned quantum phase transition in TmVO4.
- Explore the interplay between nuclear and electronic degrees of freedom.
Main Methods:
- Experimental measurements on TmVO4 single crystals.
- Application of a single-ion semiclassical mean-field model.
- Analysis of the effective Hamiltonian.
Main Results:
- Nuclear moments significantly reduce the critical field for ferroquadrupole order.
- Observed a dramatic back-bending of the phase boundary.
- The mean-field model accurately describes the behavior down to 50 mK.
- Predicted spontaneous nuclear magnetic order mediated by 4f electrons.
Conclusions:
- Hyperfine coupling plays a crucial role in tuning the quantum phase transition in TmVO4.
- The findings suggest a novel electro-nuclear tetracritical point.
- This work provides insights into the complex coupling between nuclear and electronic systems in magnetic materials.
Keywords:
electro-nuclear orderhyperfine interactionnematicityquadrupole orderquantum phase transitionMore Related Videos
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