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Area of Science:

  • Condensed matter physics
  • Topological materials

Background:

  • Nodal line semimetals exhibit unique electronic properties dictated by band crossings along nodal lines.
  • Disorder effects are crucial for understanding the stability and transport properties of topological materials.

Purpose of the Study:

  • Investigate the impact of short-range disorder on nodal line semimetals.
  • Characterize the novel electronic phases and transitions induced by disorder.

Main Methods:

  • Numerically exact simulations were employed to study the system.
  • Analysis focused on the ground-state wave function's momentum-space amplitude and multifractal properties.

Main Results:

  • A novel multifractal semimetallic phase emerges at small disorder strengths, with wave function amplitude localized around the nodal line.
  • A critical disorder strength drives a transition to a compressible metal, accompanied by a change in fractality.
  • At higher disorder, an Anderson metal-insulator transition is observed.

Conclusions:

  • Disorder fundamentally alters the nature of nodal line semimetals, creating phases distinct from the clean limit.
  • The observed transitions are characterized by critical exponents and changes in multifractality.