Thermodynamic signatures of diagonal nematicity in RbFe₂As₂ superconductor.

ABSTRACT: Electronic nematic states, characterized by broken rotational symmetry, are prevalent in correlated materials. In most iron-based superconductors, the nematic anisotropy aligns with the Fe-Fe direction of the iron square lattice. However, recent investigations propose a unique form of nematicity oriented along the diagonal Fe-As direction in heavily hole-doped AFe2As2 ( A=Rb or Cs). Yet, the transport studies focusing on the fluctuations of such nematicity yield conflicting outcomes regarding the presence and orientation of the nematic fluctuations. Here, we report high-resolution heat capacity measurements conducted under in-plane field rotation in RbFe2As2 . While no discernible anomaly associated with the nematic transition is found in the temperature dependence of specific heat, the fi

SUBMITTER: Mizukami Y 

PROVIDER: S-EPMC11969064 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature