Evidence of quantum criticality in the doped Haldane system Y2BaNiO5

Details Evidence of quantum criticality in the doped Haldane system Y2BaNiO5 Evidence of quantum criticality in the doped Haldane system Y2BaNiO5

2000-03-09

arxiv.org/abs/cond-mat/0003147v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.62.2998

Experimental bulk susceptibility X(T) and magnetization M(H,T) of the S=1-Haldane chain system doped with nonmagnetic impurities, Y2BaNi1-xZnxO5 (x=0.04,0.06,0.08), are analyzed. A numerical calculation for the low-energy spectrum of non-interacting open segments describes very well experimental data above 4 K. Below 4 K, we observe power-law behaviors, X(T)=T^-alpha and M(H,T)/T^(1-alpha)=f(alpha,(H/T)), with alpha (<1) depending on the doping concentration x.This observation suggests the appearance of a gapless quantum phase due to a broad distribution of effective couplings between the dilution-induced moments.

Affiliated with

Also associated with

No associations

Rating

Evidence of quantum criticality in the doped Haldane system Y2BaNiO5 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Evidence of quantum criticality in the doped Haldane system Y2BaNiO5, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence of quantum criticality in the doped Haldane system Y2BaNiO5 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-653579