Logarithmic divergence of the electrical resistivity in the metal hydride YH3-delta

As reported earlier, the metal hydride YHx reveals spectacular switchable optical properties. In this Letter we report on another remarkable property of the hydrogen deficient YH3-delta trihydride phase. A logarithmic temperature dependence of the electrical resistivity is observed within a large temperature range (20 less than or equal to T less than or equal to 200 K) for hydrogen deficiencies 0.01 < delta < 0.15. This dependence may be related to two dimensional weak localization or Kondo scattering of the conduction electrons. [S0031-9007(97)04448-7].