Magnetic bound states in the quarter-filled ladder system α′-NaV2O5

被引：36

作者：

Lemmens, P ^{[1
]}

Fischer, M

Els, G

Guntherodt, G

Mishchenko, AS

Weiden, M

Hauptmann, R

Geibel, C

Steglich, F

机构：

[1] Rhein Westfal TH Aachen, Inst Phys 2, D-52056 Aachen, Germany

[2] RRC Kurchatov Inst, Moscow 123182, Russia

[3] MPI CPFS, D-01187 Dresden, Germany

[4] Tech Univ Darmstadt, FB Tech Phys, D-64289 Darmstadt, Germany

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.58.14159

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Raman scattering in the quarter-filled spin ladder system alpha'-NaV2O5 shows in the dimerized singlet ground state (T less than or equal to T-SP = 35 K) an unexpected sequence of three magnetic bound stares. Our results suggest that the recently proposed mapping onto an effective spin chain for T > T-SP has to be given up in favor of the full topology and exchange paths of a ladder in the dimerized phase for T<T-SP. As the new ground state we propose a dynamic superposition of energetically nearly degenerate dimer configurations on the ladder. [S0163-1829(98)03646-7].

引用

页码：14159 / 14162

页数：4

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