Using electronic structure changes to map the H-T phase diagram of alpha'-NaV2O5

Details Using electronic structure changes to map the H-T phase diagram of alpha'-NaV2O5 Using electronic structure changes to map the H-T phase diagram of alpha'-NaV2O5

2001-03-24

arxiv.org/abs/cond-mat/0103503v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures, PRB accepted

Scientific paper

10.1103/PhysRevB.63.220401

We report polarized optical reflectance studies of \alpha'-NaV2O5 as a function of temperature (4-45 K) and magnetic field (0-60 T). Rung directed electronic structure changes, as measured by near-infrared reflectance ratios \Delta R(H)=R(H)/R(H=0 T), are especially sensitive to the phase boundaries. We employ these changes to map out an H-T phase diagram. Topological highlights include the observation of two phase boundaries slightly below T_{SG}, enhanced curvature of the 34 K phase boundary above 35 T, and, surprisingly, strong hysteresis effects of both transitions with applied field.

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