TY - JOUR
T1 - Pressure effect on the spin gap opening temperature for Ca-doped and oxygen-deficient YBCO superconductors
AU - Shen, L. J.
AU - Lam, C. C.
AU - Anand, Vyas
AU - Li, S. H.
AU - Jin, X.
PY - 2000
Y1 - 2000
N2 - The spin gap opening temperature in the normal state of bulk Ca-doped and oxygen-deficient YBCO superconductors was investigated under various high hydrostatic pressures. Under the ambient pressure, T* can be expressed in terms of Tc as T* (n) = T *(OP) +α(1 - Tc (n) /Tcmax)1/2. Under various high pressures, this expression is still valid, so, T*(n,P) = T*(OP) +α(P)(1-Tc(n,P)/Tcmax)1/2. Experiments show that the parameter T*(OP)is pressure-independent, while α(P) decreases linearly with increasing pressure. This indicates that the structural change considerably affects the spin gap behavior.
AB - The spin gap opening temperature in the normal state of bulk Ca-doped and oxygen-deficient YBCO superconductors was investigated under various high hydrostatic pressures. Under the ambient pressure, T* can be expressed in terms of Tc as T* (n) = T *(OP) +α(1 - Tc (n) /Tcmax)1/2. Under various high pressures, this expression is still valid, so, T*(n,P) = T*(OP) +α(P)(1-Tc(n,P)/Tcmax)1/2. Experiments show that the parameter T*(OP)is pressure-independent, while α(P) decreases linearly with increasing pressure. This indicates that the structural change considerably affects the spin gap behavior.
UR - http://www.scopus.com/inward/record.url?scp=0343396774&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(00)00740-1
DO - 10.1016/S0921-4534(00)00740-1
M3 - Article
AN - SCOPUS:0343396774
SN - 0921-4534
VL - 341-348
SP - 929
EP - 930
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - PART 3
ER -