Figure 2: Anisotropy of the 2D superconductivity at the (001) and (110) interfaces. | Nature Communications

Figure 2: Anisotropy of the 2D superconductivity at the (001) and (110) interfaces.

From: Engineering two-dimensional superconductivity and Rashba spin–orbit coupling in LaAlO3/SrTiO3 quantum wells by selective orbital occupancy

Figure 2

Sheet resistance of (a) the (110)-interface with t=14 MLs and (b) the (001)-interface with t=10 MLs, under magnetic fields applied parallel to the interface. The field values are indicated in the panels. Panel (c) shows the temperature dependence of out-of-plane μ0Hc2,⊥ and in-plane μ0Hc2,‖ critical fields of (001)—red circles—and (110)—blue triangles—interfaces, corroborating the 2D character of the superconductivity for both orientations. (d) The upper critical fields are displayed as a function of the temperature for both the orientations (field in-plane). The dotted and dashed straight lines indicate the Pauli-limited critical fields . The observation of higher critical fields for the (001) interface is consistent with the larger anisotropy of the 2DEG superconductivity and stronger spatial confinement for (001).

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