Weak antilocalization and localization in Eu_2Ir_2O_7 (111) thin films by reactive solid phase epitaxy
arxiv(2024)
摘要
Thin films of the pyrochlore iridates along the [111] direction have drawn
significant attention to investigate exotic correlated topological phenomena.
Here, we report the fabrication of Eu_2Ir_2O_7 thin films via reactive
solid phase epitaxy using the pulsed laser deposition technique. We mainly
focus on the transport properties of the films below the magnetic phase
transition at 105 K. Analyses on the temperature and the field dependences of
resistivity unveil the presence of weak antilocalization, a characteristic
signature of the Weyl semimetallic state that has been "buried" by magnetism.
Moreover, it is noteworthy that the contribution from many-body interactions in
Eu2Ir2O7 thin films is enhanced at lower temperatures and competes with the
weak antilocalization effect, and eventually drives the crossover to weak
localization at 2 K.
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