Electron spin resonance study of Na_{1-x}Li_xV_2O_5

Details Electron spin resonance study of Na_{1-x}Li_xV_2O_5 Electron spin resonance study of Na_{1-x}Li_xV_2O_5

1999-08-03

arxiv.org/abs/cond-mat/9908046v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages including 4 ps figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.61.9523

We measured X-band electron-spin resonance of single crystalline sodium vanadate doped with lithium, Na_{1-x}Li_xV_2O_5 for 0 < x < 1.3% . The phase transition into a dimerized phase that is observed at 34 K in the undoped compound, was found to be strongly suppressed upon doping with lithium. The spin susceptibility was analyzed to determine the transition temperature and the energy gap with respect to the lithium content. The transition temperature Tsp is suppressed following a square dependence of the lithium concentration while the energy gap is found to decrease linearly. At high temperatures (T>Tsp) the susceptibility remains nearly independent of doping.

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