Current driven first order metal-metal martensitic phase transitions in correlated electron systems

As a function of temperature and pressure, a number elemental 3d metals such as Fe or V undego first order martensitic phase transitions between bcc and fcc structures. Similar metal to metal first order phase transitions occur in other transition metals and alloys including most famously shape memory alloys. In analogy with the spin Berry phase, defined is an electro-mechamical such phase defined by the four connection A_μ that couples to the conduction electron charge current. It is implied that, for highly pure wires of such materials, an electronic charge current can drive say the bcc to fcc martensitic phase transition of a suitable metrial well below the strain, temperature and/or pressure that which this usually occurs. This leaves the material in a higher energy state thereby converting electrical to lattice energy in much the same manner as currents can drive a magnetic state to higher energy. The theory also applies to domain walls in conducting ferro and antiferroelectric meterials.