Uniform electronic states and -wave superconductivity in a strongly disordered high-entropy compound (RuRhPdIr)0.6Pt0.4Sb

@article{S.Kitagawa_PRB_2025c,

title = {Uniform electronic states and 𝑠-wave superconductivity in a strongly disordered high-entropy compound 𝑋0.6⁢Pt0.4⁢Sb (𝑋 = Ru, Rh, Pd, Ir)},

author = {Y Yamada and S Kitagawa and T Ihara and K Ishida and N Uematsu and D Hirai and K Takenaka},

url = {https://arxiv.org/abs/2508.00342},

doi = {10.1103/b4nw-c4zy},

year  = {2025},

date = {2025-07-31},

urldate = {2025-07-31},

journal = {Physical Review B},

volume = {112},

pages = {L020508},

abstract = {High-entropy compounds, where multiple elements occupy a single crystallographic site in a highly disordered manner, challenge conventional understandings of electronic structures based on periodicity and well-defined band dispersion. Here, we report a detailed nuclear magnetic resonance study of the high-entropy superconductor 𝑋0.6⁢Pt0.4⁢Sb (𝑋 = Ru, Rh, Pd, Ir), revealing a spatially homogeneous electronic environment in the normal state, in stark contrast to its crystallographically disordered lattice. The superconducting state exhibits a small but solid Hebel-Slichter coherence peak followed by a significant decrease in the nuclear spin-lattice relaxation rate, providing compelling evidence for fully gapped 𝑠-wave pairing. Our findings not only deepen the understanding of superconductivity in highly disordered quantum materials but also open an alternative pathway for exploring superconducting states in entropy-stabilized systems.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}