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Transverse fields to tune an Ising-nematic quantum phase transition.
Akash V Maharaj1,2, Elliott W Rosenberg3, Alexander T Hristov4,2
1Department of Physics, Stanford University, Stanford, CA 94305.
Summary
Quantum phase transitions in materials can be tuned using strain or magnetic fields. These fields act like a transverse field in the Ising model, controlling quantum fluctuations and symmetry breaking in electronic nematic systems.
Area of Science:
- Condensed Matter Physics
- Quantum Materials
- Phase Transitions
Background:
- Continuous quantum phase transitions differ from classical ones due to dynamics.
- The transverse field Ising model is a key example, where quantum fluctuations drive symmetry restoration.
- Ising pseudospins model systems with broken symmetry, including electronic nematic order.
Purpose of the Study:
- To demonstrate how strain or magnetic fields can act as a transverse field analogue.
- To provide a practical method for tuning materials to a quantum critical point.
- To explore the interplay between different order parameters in quantum systems.
Main Methods:
- Investigating orbital-nematic ordering in a non-Kramers doublet system.
- Applying orthogonal strain and perpendicular magnetic fields as tuning parameters.
- Analyzing the commutation relations and effective field theory, including Berry-phase terms.
Main Results:
- Orthogonal strain and perpendicular magnetic fields effectively mimic the role of a transverse field.
- These fields can drive the system towards a quantum critical point.
- Nontrivial commutation relations reveal an intrinsic link between transverse fields and the nematic order parameter.
Conclusions:
- Strain and magnetic fields offer a tunable route to quantum criticality in electronic nematic systems.
- The findings highlight the importance of dynamics in quantum phase transitions.
- Understanding the interplay of order parameters is crucial for designing quantum materials.
Keywords:
condensed matter physicselectronic nematicityquantum phase transitionsstrongly correlated electronsMore Related Videos
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