Universal relation between doping content and normal-state resistance in gate voltage tuned ultrathin Bi2Sr2CaCu2O8+x flakes

Extremely fast vortices dynamics in Bi2Sr2Ca2Cu3O10+δ crystalline nanostrip

“…Although the oxygen atoms of ultra-thin Bibased high T c superconductor are prone to degrade even under ambient conditions when reduce the thickness down to 0.5 U.C., [39] and cryogenic cleavage is necessitated for ultra-thin Bi-based high T c superconductor in constructing twisted cuprate superconductors. [40] However, recent experiments [36,41] showed that thin flakes of Bi-based high T c superconductor exfoliated at room temperature still maintain relatively high T c for films with thickness more than 2 U.C. if the exposure time to ambient environment is limited within 20 min.…”

Enhancement of superconductivity by organic flexible substrates in NbSe2 thin flakes

“…Mechanical exfoliation is an important approach to fabricate low-dimensional materials in the field of basic research [21,41,42]. The most significant advantage of this method is that two-dimensional materials can be easily prepared on different substrates, including inorganic rigid substrates and organic flexible substrates.…”

“…Two-dimensional (2D) or quasi-2D superconductivity has drawn great interests due to the emergence of new quantum phenomena [1][2][3]. For example, Ising superconductivity [4][5][6][7], quantum metallic state [8][9][10][11], Berezinskii-Kosterlitz-Thouless (BKT) transition [12,13], superconductor-insulator transition tuned by the electrostatic technique [14][15][16][17][18][19][20][21], 5 These authors contributed equally. * Authors to whom any correspondence should be addressed.…”

“…quantum Griffiths singularity [22][23][24][25][26][27][28][29], and even the significant enhancement of T c [30][31][32] have been investigated intensively. Generally speaking, superconductivity can be tuned by chemical doping [33], gate voltage [21], pressure [34,35], and so on. The importance of the interaction between the superconducting (SC) materials and the substrates was noticed in Nb films [36], MgB 2 films [37], and monolayered FeSe system [30].…”