INELASTIC NEUTRON-SCATTERING FROM THE SPIN LADDER COMPOUND (VO)(2)P2O7

被引：146
|
作者：
ECCLESTON, RS
BARNES, T
BRODY, J
JOHNSON, JW
机构：
[1] OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831
[2] OAK RIDGE NATL LAB,CTR COMPUTAT INTENS PHYS,OAK RIDGE,TN 37831
[3] UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996
[4] EXXON RES & ENGN CO,CORP RES LABS,ANNANDALE,NJ 08801
来源：
PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 19期
关键词：
D O I：
10.1103/PhysRevLett.73.2626
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present results from an inelastic neutron scattering experiment on the candidate Heisenberg spin ladder vanadyl pyrophosphate, (VO)(2)P2O7 We find evidence for a spin-wave excitation gap of E(gap) = 3.7 +/- 0.2 meV at a band minimum near Q = 0.8 Angstrom(-1). This is consistent with expectations for triplet spin waves in (VO)(2)P2O7 in the spin-ladder model and represents the first confirmation in nature of a Heisenberg antiferromagnetic spin ladder.
引用
收藏
页码：2626 / 2629
页数：4
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