Catherine M. S. Alexander

DESTRUCTION OF THE MOTT INSULATING GROUND STATE OF CA2RUO4 BY A STRUCTURALTRANSITION

We report a first-order phase transition at T_M=357 K in single crystal Ca_2RuO_4, an isomorph to the superconductor Sr_2RuO_4. The discontinuous decrease in electrical resistivity signals the near destruction of the Mott insulating phase and is triggered by a structural transition from the low temperature orthorhombic to a high temperature tetragonal phase. The magnetic susceptibility, which is temperature dependent but not Curie-like decreases abruptly at TM and becomes less temperature dependent. Unlike most insulator to metal transitions, the system is not magnetically ordered in either phase, though the Mott insulator phase is antiferromagnetic below T_N=110 K.

Magnetization and magnetotransport of LBaCo2O5.5(L=Gd, Eu) single crystals

The magnetization, resistivity, and magnetoresistance (MR) of single crystals of

Weak ferromagnetism and spin-charge coupling in single-crystalSr2YRuO6

\mathrm{Gd}\mathrm{Ba}{\mathrm{Co}}_{2}{\mathrm{O}}_{5.5}

Ground-state instability of the Mott insulator Ca 2 RuO 4 : Impact of slight La doping on the metal-insulator transition and magnetic ordering

and

Magnetic ordering and enhanced electronic heat capacity in insulating L 2 RuO 5 ( L = Pr , Nd, Sm, Gd, and Tb)

\mathrm{Eu}\mathrm{Ba}{\mathrm{Co}}_{2}{\mathrm{O}}_{5.5}

Angle-resolved de Haas–van Alphen study of Sr Ru O 3

are measured over a wide range of dc magnetic fields (up to

Srn+1RunO3n+1: nature’s engineered multi-layered systems

30\phantom{\rule{0.3em}{0ex}}\mathrm{T}

Magnetic properties of GdBaCo2O5+δ single crystals

) and temperature. In

Transport and thermodynamic properties of Sr3Ru2O7 near the quantum critical point

L\mathrm{Ba}{\mathrm{Co}}_{2}{\mathrm{O}}_{5.5}