Spin dimers under staggered and random field in Cu$_2$Fe$_2$Ge$_4$O$_{13}

T. Masuda; K. Kakurai; A. Zheludev

paper

Spin dimers under staggered and random field in Cu $_{2}$ Fe $_{2}$ Ge $_{4}$ O$_{13}

arXiv:0909.2402

Abstract

We study $S = 1/2$ dimer excitation in a coupled chain and dimer compound Cu $_{2}$ Fe $_{2}$ Ge $_{4}$ O $_{13} b y in e l a s t i c n e u t r o n sc a tt er in g t ec hni q u e . T h e Z ee man s pl i t o f t h e d im er t r i pl e t b y a s t a g g er e df i e l d i so b ser v e d a tl o w t e m p er a t u r e . W i t h t h e in cr e a seo f t e m p er a t u r e t h ee f f ec t o f r an d o m f i e l d i s d e t ec t e d b y a d r a s t i c b r o a d e nin g o f t h e t r i pl e t e x c i t a t i o n . B a s i c d y nami cso f d im er in t h es t a g g er e d an d r an d o m f i e l d s a r ee x p er im e n t a l l y i d e n t i f i e d in C u$ _2 $F e$ _2 $G e$ _4 $O$ _{13}.

4 pages, 4 figures, to be published in Phys. Rev. B RC

Spin dimers under staggered and random field in Cu2​Fe2​Ge4​O$_{13}

Abstract

Spin dimers under staggered and random field in Cu $_{2}$ Fe $_{2}$ Ge $_{4}$ O$_{13}