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Hybridization wave as the "hidden order" in URu2Si2.
Yonatan Dubi1, Alexander V Balatsky
1Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Physical Review Letters
|March 17, 2011
Summary
A new model explains the hidden order transition in Uranium Ruthenium Silicide (URu2Si2) by identifying it as a momentum-carrying electron band hybridization. This model aligns with experimental data and predicts observable phenomena in heavy-Fermion materials.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- URu2Si2 is a heavy-Fermion material exhibiting a mysterious "hidden order" phase below 17.5 K.
- Understanding the microscopic origin of this hidden order is a long-standing challenge in condensed matter physics.
Purpose of the Study:
- To introduce a phenomenological model for the hidden order transition in URu2Si2.
- To identify the order parameter associated with the hidden order phase.
- To explore the implications of this model for URu2Si2 and similar materials.
Main Methods:
- Development of a phenomenological model based on hybridization between electronic bands.
- Qualitative comparison of model predictions with experimental results.
- Analysis of band structure and density of states.
Main Results:
- The hidden order is proposed to be an incommensurate, momentum-carrying hybridization between light hole and heavy electron bands.
- This modulated hybridization follows a Fano hybridization occurring at higher temperatures.
- The model predicts a gap-like feature in the density of states and specific features at an incommensurate vector Q*.
- The hybridization wave is identified as the order parameter.
Conclusions:
- The proposed model provides a consistent explanation for the hidden order in URu2Si2.
- The model is supported by experimental evidence from neutron scattering and scanning tunneling microscopy.
- The model offers testable predictions for future experiments on URu2Si2 and related heavy-Fermion systems.
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