Theory of doping and temperature dependence of the normal-state spin susceptibility of the copper-oxide superconductors

✍ Scribed by Y.R. Wang; M. Franz

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 492 KB
• Volume: 225
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)90334-4

✦ Synopsis

Based on our previously derived z(q, eg) for the t-J model in a spin liquid state, we show that the temperature (T) dependence of the static magnetic susceptibility, Zs (T), of LaE_xSrxCuO4, over the entire experimentally studied doping (x) range, is in good agreement with our theoretical prediction. For very small x, Z~(T) = a + bT is predicted from our theory, where the coefficients a and b are derived in terms of x and J only. For sufficiently large x, Zs (T) =A [ 1 + 2x In ( 1.14ogc/ka T) ], where o9¢ ~ J is a cutoff energy. Thus Zs (T) decreases with decreasing of temperature for small x, but increases logarithmically for large x. Between these two limits, Zs (T) can display a very weak temperature dependence, but the nuclear spin relaxation rate at the Cu site, 1/T~ T, increases as 1 / T at low temperature.