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11 August 2020
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Field-Dependent Hall Effect in Single Crystal Heavy Fermion YbAgGe below 1K
S.L. Bud’ko ; V.Zapf ; E. Morosan ; P.C. Canfield ;
Date 14 Jul 2005
Subject Strongly Correlated Electrons | cond-mat.str-el
AbstractWe report the results of a low temperature (T >= 50 mK) and high field (H <= 180 kOe) study of the Hall resistivity in single crystals of YbAgGe, a heavy fermion compound that demonstrates field-induced non-Fermi-liquid behavior near its field-induced quantum critical point. Distinct features in the anisotropic, field-dependent Hall resistivity sharpen on cooling down and at the base temperature are close to the respective critical fields for the field-induced quantum critical point. The field range of the non-Fermi-liquid region decreases on cooling but remains finite at the base temperature with no indication of its conversion to a point for T -> 0. At the base temperature, the functional form of the field-dependent Hall coefficient is field direction dependent and complex beyond existing simple models thus reflecting the multi-component Fermi surface of the material and its non-trivial modification at the quantum critical point.
Source arXiv, cond-mat/0507338
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