Hydrostatic pressure effect on T_c of new BiS₂‐based Bi₄O₄S₃ and NdO_0.5F_0.5BiS₂ layered superconductors

Abstract

We investigate the external hydrostatic pressure effect on the superconducting transition temperature (Tc) of new layered superconductors Bi4O4S3 and NdO0.5F0.5BiS2. Though the Tc is found to have a moderate decrease from 4.8 K to 4.3 K (dTconset/dP = –0.28 K/GPa) for Bi4O4S3 superconductor, the same increases from 4.6 K to 5 K (dTconset/dP = 0.44 K/GPa) up to 1.31 GPa followed by a sudden decrease from 5 K to 4.7 K up to 1.75 GPa for NdO0.5F0.5BiS2 superconductor. The variation of Tc in these systems may be correlated to an increase or decrease of the charge carriers in the density of states under externally applied pressure. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Superconducting and magneto-transport properties of BiS2 based superconductor PrO1-xFxBiS2 (x = 0 to 0.9)

“…3,8,17 The superconducting transition temperature is the highest at the optimal doping point of around x ¼ 0. 17,[20][21][22] and the results indicated the enhancement of superconductivity, accompanied by the suppression of semiconducting behavior with increase in pressure. Multiband behavior with dominant electron carriers in these materials has been observed by both experimental and theoretical studies, and electron carriers are being known to be originated from the Bi 6p orbital.…”

“…A chance to explore superconductivity and increase T c in these new compounds has already resulted in a lot of work that appeared shortly after their discovery. [1][2][3][4][5][6][7][8][9][10][11][18][19][20][21][22] Hall effect measurements revealed multiband features and suggested that superconducting pairing occurs in one dimensional chains. 16 These compounds do also possess reasonably good thermoelectric properties.…”

Role of the Ce valence in the coexistence of superconductivity and ferromagnetism ofCeO1−xFxBiS2revealed by CeLSugimoto1, Joseph2, Paris3 et al. 2014Phys. Rev. B7211570View full textAdd to dashboardCite

“…In addition, high pressure studies on optimally doped LaO 0.5 F 0.5 BiS 2 (synthesized at ambient pressure) have revealed that T c increases up to the maximum value of 10.1 K at 1-2 GPa followed by a gradual decrease with increasing pressure. [18][19][20] These experiments indicate that the superconductivity in BiS 2 -based superconductors is highly sensitive to the local atomic displacements.…”

Influence of pressure on the transport, magnetic, and structural properties of superconducting Cr0.0009NbSe2 single crystal

“…The interaction of superconductivity and density wave orders is an essential part of various superconductors such as high-T c cuprates, Fe-based, BiS 2 -based, topological and twodimensional (2D) layered superconductors. [1][2][3][4][5][6][7][8] 2D transition metal dichalcogenide (TMDC) materials have attracted remarkable attention because of their exclusive properties that exhibit many features similar to those seen in high-T c cuprates, 1,2 MgB 2 , 9 Fe-based 3,10 and BiS 2 -based 4,5,11 and 2D layered 7,8,[12][13][14][15] superconductors. The interplay of the static modulation of the electronic density of states close to the Fermi level and superconducting properties at lower temperatures in the layered TMDC has been of interest for a few decades.…”