Uniaxial c-axis pressure effects on the underdoped superconductor BaFe2(As0.72P0.28)(2)

Article

关键词: QUANTUM CRITICAL-POINT;    IRON;    DYNAMICS;   

DOI  :  10.1103/PhysRevB.101.020507

来源: SCIE

【 摘 要 】

The optimal superconductivity (T-c approximate to 30 K) in BaFe2( As1-xPx)(2) can be reached when the coupled antiferromagnetic (AF) order (T-N) and orthorhombic lattice distortion (T-s) are suppressed to zero temperature with increasing of P concentration or hydrostatic pressure. Here we use transport and neutron scattering to study the c-axis pressure effects on electronic phases in underdoped BaFe2(As0.72P0.28)(2), which has T-N = T-s approximate to 40 K and T-c approximate to 28 K at zero pressure. With increasing c-axis pressure, T-N and T-s are slightly enhanced around P-c similar to 20 MPa. Upon further increasing pressure, AF order is gradually suppressed to zero, while T-c is enhanced to 30 K. Our results reveal the importance of magnetoelastic couplings in BaFe2(As1-xPx)(2), suggesting that the c-axis pressure can be used as a tuning parameter to manipulate the electronic phases in iron pnictides.

【 授权许可】

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