  Simultaneous control of structural and physical properties via applied
electrical current poses a key, new research topic and technological
significance. Studying the spin-orbit-coupled antiferromagnet Ca2RuO4, with 3%
Mn doping to weaken the violent first-order transition at 357 K for more robust
measurements, we find that a small applied electrical current couples to the
lattice by significantly reducing its orthorhombicity and octahedral rotations,
concurrently diminishing the 125 K- antiferromagnetic transition and inducing a
new, orbital order below 80 K. Our effort to establish a phase diagram reveals
a critical regime near a current density of 0.15 A/cm2 that separates the
vanishing antiferromagnetic order and the new orbital order. Further increasing
current density (> 1 A/cm2) enhances competitions between relevant interactions
in a metastable manner, leading to a peculiar glassy behavior above 80 K. The
coupling between the lattice and nonequilibrium driven current is interpreted
theoretically in terms of t2g orbital occupancies. The current-controlled
lattice is the driving force of the observed novel phenomena.
