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  1. Free, publicly-accessible full text available August 9, 2024
  2. Revealing anisotropic nature of 2D superconductivity in the context of electronic structure, orbital character, and spin texture. 
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  3. null (Ed.)
  4. The relationship between the sheet carrier concentration, $n_s$, of LaCrO$_3$(LCO)/SrTiO$_3$(STO) heterostructures and their structural properties has been investigated. Under low oxygen partial pressure, the STO substrate is reduced during growth as evidenced by a high $n_s$ of 10$^{16}$ cm$^{-2}$. By controlling the post-growth annealing conditions, heterostructures with $n_s$ of 10$^{13}$-10$^{16}$ cm$^{-2}$ are achieved. The atomic-scale structure of the samples are obtained using high-resolution synchrotron X-ray diffraction measurements. For heterostructures with $n_s$ at or below 3$\times 10^{13}$ cm$^{-2}$, polar distortions are present within the LCO layers and increase in magnitude with decreasing sheet carrier concentration. These distortions are absent for samples with $n_s$ on the order of 10$^{15}$-10$^{16}$ cm$^{-2}$ where interfacial carriers play a role in alleviating the polar discontinuity at the LCO/STO interface. These results suggest that interfacial charge carriers and polar distortions can act as complementary mechanisms to alleviate the polar discontinuity at polar/non-polar complex oxide interfaces. 
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