2008 | A. D Caviglia, S. Gariglio, N. Reyren, D. Jaccard, T. Schneider, M. Gabay, S. Thiel, G. Hammerl, J. Mannhart, M. Triscone, et al.
The paper "Electric Field Control of the LaAlO₃/SrTiO₃ Interface Ground State" by A. D. Caviglia et al. explores the phase diagram of the LaAlO₃/SrTiO₃ interface using electric field control. The authors investigate the ground states of this interface, which can be either a magnetic state or a two-dimensional (2D) superconducting condensate. By applying an electric field, they demonstrate the ability to switch between these states and drive a quantum phase transition (QPT) between a 2D superconducting state and an insulating state (2D-QSI). The electric field tuning of carrier density allows for the modulation of superconductivity and the observation of weak localization in the insulating state. The results reveal a complex phase diagram controlled by charge density, with a quantum critical point separating the superconducting and insulating regions. This work opens the door to the development of novel mesoscopic superconducting circuits.The paper "Electric Field Control of the LaAlO₃/SrTiO₃ Interface Ground State" by A. D. Caviglia et al. explores the phase diagram of the LaAlO₃/SrTiO₃ interface using electric field control. The authors investigate the ground states of this interface, which can be either a magnetic state or a two-dimensional (2D) superconducting condensate. By applying an electric field, they demonstrate the ability to switch between these states and drive a quantum phase transition (QPT) between a 2D superconducting state and an insulating state (2D-QSI). The electric field tuning of carrier density allows for the modulation of superconductivity and the observation of weak localization in the insulating state. The results reveal a complex phase diagram controlled by charge density, with a quantum critical point separating the superconducting and insulating regions. This work opens the door to the development of novel mesoscopic superconducting circuits.