scholarly journals The mysterious spin gap in high-temperature superconductors: New NMR/NQR studies

1998 ◽  
Vol 15 (2) ◽  
pp. 197-202 ◽  
Author(s):  
D. Brinkmann
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Spin Gap

THE STUDY ON THE SPIN GAP PHENOMENON IN OXYGEN DEFICIENT YBa2Cu3O6+δ AND Ca-DOPED Y1-xCaxBa2Cu3O6+δ SUPERCONDUCTORS

1999 ◽  
Vol 13 (27) ◽  
pp. 3219-3234 ◽  
Author(s):  
L. J. SHEN ◽  
C. C. LAM ◽  
X. JIN ◽  
H. S. LAM ◽  
S. H. LI
Keyword(s):  
High Temperature ◽  
Normal State ◽  
High Temperature Superconductivity ◽  
Oxygen Deficiency ◽  
High Temperature Superconductors ◽  
Pressure Effects ◽  
Thermal Excitation ◽  
Metallic State ◽  
Specific Function ◽  
Spin Gap

The understanding of the spin gap phenomenon in the normal state of the high temperature superconductors can provide the mechanism of the high temperature superconductivity. A specific function of thermal excitation for quasiparticles was introduced based on the experimental relationship between resistivity and temperature. This specific function describes the deviation in resistivity from the T-linear relationship w.r.t. the normal state of the high temperature superconductors. With this function, the spin gap is naturally introduced. Our experimental results indicate that the spin gap behavior is closely related not only to the oxygen deficiency but also to the structural change in the a–b plane. Furthermore, we found that the crossover from anomalous metallic state to spin gap state takes place within a temperature range T S <T<T*, which depends on the oxygen content and the Ca-doping level. Pressure effects on the spin gap phenomenon in bulk samples of oxygen-deficient YBa 2 Cu 3 O 6+δ and Ca-doped Y 1-x Ca x Ba 2 Cu 3 O 6+δ were also investigated. Under high hydrostatic pressure the spin gap behavior is also severely influenced by the contraction of the a–b plane due to the pressure.

scholarly journals Theory of the spin gap in high-temperature superconductors

1996 ◽  
Vol 53 (1) ◽  
pp. 415-424 ◽  
Author(s):  
B. L. Altshuler ◽  
L. B. Ioffe ◽  
A. J. Millis
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Spin Gap

Interplane charge dynamics in high-temperature superconductors; Charge confinement and spin gap

1994 ◽  
Vol 95 (1-2) ◽  
pp. 109-121 ◽  
Author(s):  
S. Uchida ◽  
K. Tamasaku ◽  
K. Takenaka ◽  
H. Takagi
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Spin Gap ◽  
Charge Dynamics

A study by GC-MS of the decomposition of precursors for the MOCVD of high temperature superconductors

2002 ◽  
Vol 12 (4) ◽  
pp. 85-92
Author(s):  
O. V. Lopaeva ◽  
M. L. Hitchman ◽  
S. H. Shamlian ◽  
D. R. Watson
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors
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