Superconductivity in epitaxial Bi2Sr2CuO6/Bi2Sr2CaCu2O8 superlattices: The superconducting behavior of ultrathin cuprate slabs

High-Tc superconductivity in ultrathin Bi2Sr2CaCu2O8+x down to half-unit-cell thickness by protection with graphene

“…T wo-dimensional (2D) superconductors provide insights into the mechanisms of superconductivity and their possible device applications [1][2][3][4][5][6][7][8][9][10][11] . Bi2212 is a quasi-2D cuprate in which thin superconducting sheets (CuO 2 ) alternate with insulating layers (SrO, BiO).…”

Artificial superlattices grown by MBE: Could we design novel superconductors?

“…Indeed, it has been well established that the new high-T c cuprates are native superlattices, where metallic CuO 2 layers are stacked in alternation with nonmetallic oxide layers, for instance (La, Sr) 2 O 2 layers in La 2Àx Sr x CuO 4 (LSCO), Bi 2 Sr 2 O 4 layers in Bi 2 Sr 2 CuO 6 (Bi-2201), and Y and BaO layers in YBa 2 Cu 3 O 7 (YBCO). Experimental evidence in support of this picture includes the demonstration that T c stays constant even in individual high-T c (Bi-2212) layers [2,3], observation of intrinsic Josephson effects in BSCCO [4], LSCO [5], and YBCO [6], etc.…”

“…, 10. In-plane transport measurements showed that the superconducting transitions in such superlattices are essentially identical to those in thick single-phase Bi-2212 films [2]. Specifically, there was no significant decrease of T c as the number of the spacer Bi-2201 layers inserted between single-slab Bi-2212 layers was increased, see Fig.…”

Magnetic field dependence of high-Tcinterface superconductivity inLa1.55Sr0.45Gasparov1, Drigo2, Audouard3 et al. 2016Phys. Rev. B3000View full textAdd to dashboardCite

“…Much further evidence has been reported of quasi-two-dimensional nature of superconductivity in La 2-x Sr x CuO 4 as well as various other cuprates [50][51][52] , including observation of free vortices 53,54 at temperatures well above T c . One should mention analogous observations in various other layered superconducting materials and ultrathin films, both inorganic and organic [55][56][57][58][59][60] , a detailed review of which is beyond the scope of the present paper.…”