Thin film growth of (Cu, C)Ba2Ca(n−1)CunOy (n=1–4) superconductor by molecular beam epitaxy

In situ characterization of transport properties of superconducting (Cu,C)-system thin films

“…6. Relationship between T c(q=0) and temperature coefficient of resistivity (TCR) 1/q [290 K] (dq/dT) of the PLD films in this study and those of between T c(q=0) and TCR of exposed sputter-synthesis by Adachi et al [4] and MBE-grown film by Shibata et al [6]. Fig.…”

“…T c(q=0) and r [290 K] of sputter-synthesis [4,6] and MBE-grown film [8]. On the other hand, the correlation between T c(q=0) and TCR could be lost by air exposure for (Cu, C)-1201 films (see Figs Relationship between T c(q=0) and in situ normal conductivity at 290 K (r [290 K] ) of the PLD films in this study and those of between T c(q=0) and conductivity of air exposed sputter-synthesis by Adachi et al [4] and Shipra et al [8], and MBEgrown film by Shibata et al [6].…”

“…(Cu, C)Ba 2 Ca nÀ1 Cu n O x [(Cu, C)-12(n À 1)n] and CuBa 2 Ca nÀ1 Cu n O x [Cu-12(n À 1)n] are one of promising high temperature superconducting cuprate (HTS), because of the non-toxic elements and their low growth temperature, their potential for high critical temperature T c and low anisotropy [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. The multi-layered Cu-and (Cu, C)-system HTS, the presence of a widely controllable conductivity of the reservoirs, lead to novel properties that a maintenance high T c even in a heavily over-doped region [2], a controllability of the interband coupling as well as their c-axis transport, a possibility of multi-component superconductivity in multi-layered HTS with a proper interband coupling [17].…”

Photoresponse of a La1.85Sr0.15CuO4nanostrip

“…Ultrathin films of La 1.85 Sr 0.15 CuO 4 were synthesized in a custom-designed ultrahigh-vacuum chamber (base pressure <10 -7 Pa) from metal sources by means of reactive co-evaporation [16,17,19].…”

Preparation and superconducting properties of the (Cu,C)Ba2Ca3Cu4O11+y films with zero-resistance transition temperature of 96 K

“…With a strain effect from an appropriate substrate, film deposition methods are a possible way to fabricate this kind of metastable material. Actually, there were a few reports about the (Cu,C)-1234 films fabricated by pulsed laser deposition (PLD) method [10][11][12][13][14], sputtering method [15] and molecular beam epitaxy (MBE) method [16,17]. However, all these previous films exhibited relatively low zero-resistance critical temperature (T c0 ) or even no superconductivity, and the maximum T c0 was only 78 K reported previously [12] and has never been improved any more.…”