Correlated oxide Dirac semimetal in the extreme quantum limit.

ABSTRACT: Quantum materials (QMs) with strong correlation and nontrivial topology are indispensable to next-generation information and computing technologies. Exploitation of topological band structure is an ideal starting point to realize correlated topological QMs. Here, we report that strain-induced symmetry modification in correlated oxide SrNbO₃ thin films creates an emerging topological band structure. Dirac electrons in strained SrNbO₃ films reveal ultrahigh mobility (μ_max ≈ 100,000 cm²/Vs), exceptionally small effective mass (m* ~ 0.04m_e), and nonzero Berry phase. Strained SrNbO₃ films reach the extreme quantum limit, exhibiting a sign of fractional occupation of Landau levels and giant mass enhancement. Our resu

SUBMITTER: Ok JM 

PROVIDER: S-EPMC8443170 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature