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
- Nuclear Magnetic Resonance
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 the presence of hyperfine interactions.
- Explore the emergence of novel ordered states.
Main Methods:
- Single-ion semiclassical mean-field model.
- Analysis of the effective Hamiltonian.
- Experimental measurements on TmVO4 single crystals (implied).
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 behavior down to 50 mK.
Conclusions:
- Hyperfine coupling plays a crucial role in tuning the quantum phase transition.
- Predicted spontaneous nuclear magnetic order mediated by 4f electrons.
- Proposed an electro-nuclear tetracritical point under specific strain conditions.
Keywords:
electro-nuclear orderhyperfine interactionnematicityquadrupole orderquantum phase transitionMore Related Videos
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