Zizhong Li1,Apoorv Jindal2,Alex Strasser3,Yangchen He1,David Graf4,Wenkai Zheng4,Kenji Watanabe5,Takashi Taniguchi6,Luis Balicas4,Xiaofeng Qian3,Abhay Narayan Pasupathy2,Daniel Rhodes1
University of Wisconsin Madison1,Columbia University2,Texas A&M University3,National High Magnetic Field Laboratory4,NIMS5,Kyoto University6
Zizhong Li1,Apoorv Jindal2,Alex Strasser3,Yangchen He1,David Graf4,Wenkai Zheng4,Kenji Watanabe5,Takashi Taniguchi6,Luis Balicas4,Xiaofeng Qian3,Abhay Narayan Pasupathy2,Daniel Rhodes1
University of Wisconsin Madison1,Columbia University2,Texas A&M University3,National High Magnetic Field Laboratory4,NIMS5,Kyoto University6
Non-centrosymmetric 2D superconductors offer an opportunity to explore superconducting behaviors with large values of anisotropy. Among the non-centrosymmetric families, T<sub>d</sub>-MoTe<sub>2</sub> is a representative material because of its rich phases. Notably, T<sub>d</sub>-MoTe<sub>2</sub> is the first 2D materials that demonstrated a coupling between ferroelectricity and superconductivity, and this ferroelctric switching can be simply controlled by electrical gating. Here, we will present on the superconducting behavior in bilayer T<sub>d</sub>-MoTe<sub>2</sub> under the application of an applied magentic field along different directions in-plane and under differing displacement fields and doping densities. Importantly, we find that bilayer T<sub>d</sub>-MoTe<sub>2</sub> has two-fold symmetric superconducting behavior as a function of in-plane magnetic field angle that maximizes along the a-axis, parallel to the mirror plane. The two-fold anisotropy is preserved in the entire superconducting region, even with the interaction of strong Rashba spin-orbit coupling, and we find that the two-fold symmetric superconductivity exists after the ferroelectric switching. Our findings generally agree with previously observed results in multilayer and monolayer T<sub>d</sub>-MoTe<sub>2</sub> and the expected spin-orbit enhanced upper critical fields as found in DFT calculations.