SPIN-SPIN CORRELATION IN THE QUANTUM CRITICAL REGIME OF LA2CUO4

被引:97
作者
IMAI, T
SLICHTER, CP
YOSHIMURA, K
KATOH, M
KOSUGE, K
机构
[1] UNIV ILLINOIS,SCI & TECHNOL CTR SUPERCONDUCT,URBANA,IL 61801
[2] KYOTO UNIV,DEPT CHEM,KYOTO 606,JAPAN
关键词
D O I
10.1103/PhysRevLett.71.1254
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report measurements of the Cu-63 nuclear spin echo decay rate (63)1/T2G in the paramagnetic state of a quasi-two-dimensional antiferromagnet La2CuO4 UP to 900 K, and from it deduce the temperature dependence of the spin-spin correlation length xi. Xi shows a crossover from xi is similar to exp(J/k(B)T) in the renormalized classical regime (T less than or similar to 600 K) to xi is similar to J/k(B)T in the quantum critical regime (T greater than or similar to 600 K), where J is the exchange interaction. Our finding that the ratio 63T1T/63T2G is temperature independent, where 63T1 is the Cu-63 nuclear spin-lattice relaxation time, gives clear evidence for quantum critical scaling.
引用
收藏
页码:1254 / 1257
页数:4
相关论文
共 19 条
[1]   CL-35 NMR-STUDY OF SPIN DYNAMICS IN SR2CUO2CL2 [J].
BORSA, F ;
CORTI, M ;
GOTO, T ;
RIGAMONTI, A ;
JOHNSTON, DC ;
CHOU, FC .
PHYSICAL REVIEW B, 1992, 45 (10) :5756-5759
[2]   ELECTRON AND NUCLEAR MAGNETIC-RELAXATION IN LA2CUO4 AND RELATED CUPRATES [J].
CHAKRAVARTY, S ;
ORBACH, R .
PHYSICAL REVIEW LETTERS, 1990, 64 (02) :224-227
[3]   TWO-DIMENSIONAL QUANTUM HEISENBERG-ANTIFERROMAGNET AT LOW-TEMPERATURES [J].
CHAKRAVARTY, S ;
HALPERIN, BI ;
NELSON, DR .
PHYSICAL REVIEW B, 1989, 39 (04) :2344-2371
[4]   THE EXACT CORRELATION LENGTH OF THE ANTIFERROMAGNETIC D=2+1 HEISENBERG-MODEL AT LOW-TEMPERATURES [J].
HASENFRATZ, P ;
NIEDERMAYER, F .
PHYSICS LETTERS B, 1991, 268 (02) :231-235
[5]   LOW-FREQUENCY SPIN DYNAMICS IN UNDOPED AND SR-DOPED LA2CUO4 [J].
IMAI, T ;
SLICHTER, CP ;
YOSHIMURA, K ;
KOSUGE, K .
PHYSICAL REVIEW LETTERS, 1993, 70 (07) :1002-1005
[6]   MAGNETIC EXCITATIONS IN PURE, LIGHTLY DOPED, AND WEAKLY METALLIC LA2CUO4 [J].
KEIMER, B ;
BELK, N ;
BIRGENEAU, RJ ;
CASSANHO, A ;
CHEN, CY ;
GREVEN, M ;
KASTNER, MA ;
AHARONY, A ;
ENDOH, Y ;
ERWIN, RW ;
SHIRANE, G .
PHYSICAL REVIEW B, 1992, 46 (21) :14034-14053
[7]   LOW-TEMPERATURE DYNAMICS OF THE 2D SPIN-1/2 HEISENBERG-ANTIFERROMAGNET - A QUANTUM MONTE-CARLO STUDY [J].
MAKIVIC, M ;
JARRELL, M .
PHYSICAL REVIEW LETTERS, 1992, 68 (11) :1770-1773
[8]   THE SPIN-1/2 HEISENBERG-ANTIFERROMAGNET ON A SQUARE LATTICE AND ITS APPLICATION TO THE CUPROUS OXIDES [J].
MANOUSAKIS, E .
REVIEWS OF MODERN PHYSICS, 1991, 63 (01) :1-62
[9]   ANALYSIS OF MAGNETIC-RESONANCE EXPERIMENTS IN YBA2CU3O7 [J].
MILA, F ;
RICE, TM .
PHYSICA C, 1989, 157 (03) :561-570
[10]   APPLICATION OF THE ANTIFERROMAGNETIC-FERMI-LIQUID THEORY TO NMR EXPERIMENTS ON YBA2CU3O6.63 [J].
MONIEN, H ;
PINES, D ;
TAKIGAWA, M .
PHYSICAL REVIEW B, 1991, 43 (01) :258-274