INFLUENCE OF THE SPIN GAP ON THE NORMAL STATE TRANSPORT IN YBA2CU4O8
INFLUENCE OF THE SPIN GAP ON THE NORMAL STATE TRANSPORT IN YBA2CU4O8
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DOI：
10.1103/physrevlett.70.2012
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发表时间：
1993-03-29
影响因子：
8.6
通讯作者：
WACHTER, P
中科院分区：
文献类型：
--
作者：
BUCHER, B;STEINER, P;WACHTER, P
测量了YBa_2Cu_4O_8在0 ~ 900 K温度范围内的各向异性电阻率分量。YBa_2Cu_4O_8是一种低掺杂、真正非孪晶、化学计量比的高温超导体。CuO 2平面电阻率rho（a）表现出与自旋动力学的强相关性，即，具有Knight位移和自旋晶格弛豫时间T1。沿着B轴（平面加链）的电阻率与Bloch-Gruneisen理论一致。霍尔角的余切在自旋能隙以上的温度是二次的，在自旋能隙以下是线性的。
The anisotropic resistivity components of YBa2Cu4O8 have been measured from 0 to 900 K. YBa2Cu4O8 is an underdoped, genuinely untwinned, and stoichiometric high temperature superconductor. The CuO2 plane resistivity rho(a) exhibits a strong correlation with the spin dynamics, i.e., with Knight shift and spin-lattice relaxation time T1. The resistivity along the b axis (plane plus chain) is consistent with Bloch-Gruneisen theory. The cotangent of the Hall angle is quadratic in temperature above the spin gap, and linear below.