Are Multiphase Competition and Order by Disorder the Keys to Understanding Yb(2)Ti(2)O(7)?

Area of Science:

• Condensed Matter Physics
• Quantum Magnetism

Background:

• Magnetic frustration often disrupts long-range magnetic order, as seen in spin liquids.
• Understanding mechanisms that overcome frustration is key to discovering novel collective behaviors.

Purpose of the Study:

• Investigate a minimal model capturing mechanisms relevant to the quantum spin ice candidate Yb(2)Ti(2)O(7).
• Explain the expansion of a U(1) manifold stability against a splayed ferromagnetic state.

Main Methods:

• Utilized a realistic minimal model.
• Employed a range of numerical techniques.
• Analyzed thermal and quantum fluctuations with order-by-disorder selection.

Main Results:

• Demonstrated how fluctuations expand the U(1) manifold stability.
• Observed multiple phase transitions, mirroring experimental findings in Yb(2)Ti(2)O(7).
• Provided evidence linking multiphase competition to sample-to-sample variability.

Conclusions:

• Multiphase competition is a key factor in the variability of Yb(2)Ti(2)O(7).
• This study illuminates the role of chemical pressure in rare-earth pyrochlores.
• The findings offer a path to understanding the intrinsic properties of Yb(2)Ti(2)O(7).