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.

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页码：2626 / 2629

页数：4

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