Abstract
Abstract The newly discovered family of titanium-based kagome metals, ATi₃Bi₅ (where A can be Rb or Cs), has been found to exhibit non-trivial band topology and fascinating electronic instabilities, including electronic nematicity and potential bulk superconductivity. Distinct from their vanadium-based counterparts (AV₃Sb₅), which display a charge density wave (CDW) phase that already breaks rotational symmetry, ATi₃Bi₅ shows no evidence of CDW, providing a unique platform to study nematicity in its pure form and its interplay with other correlated quantum phenomena, such as superconductivity. In this review, we highlight recent progress in both experimental and theoretical research on ATi₃Bi₅ and discuss the unresolved questions and challenges in this burgeoning field.
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