Doping fingerprints of spin and lattice fluctuations in moire superlattice systems

Article

关键词: TRANSITION-TEMPERATURE;    HUBBARD-MODEL;    CONSERVING APPROXIMATIONS;    ELECTRONIC-PROPERTIES;    SUPERCONDUCTIVITY;    INSULATOR;    EQUATION;    DATABASE;    STATES;    MOS2;   

DOI  :  10.1103/PhysRevB.105.L241109

来源: SCIE

【 摘 要 】

Twisted Van der Waals systems offer the unprecedented possibility to tune different states of correlated quantum matter with external noninvasive electrostatic doping. The nature of the superconducting order presents a recurring open question in this context. In this work, we assess quantitatively the case of spinfluctuation-mediated pairing for F-valley twisted transition metal dichalcogenide homobilayers. We calculate self-consistently and dynamically the doping-dependent superconducting transition temperature Tc revealing a superconducting dome with a maximal Tc ??? 0.1???1 K depending on twist angle. We compare our results with conventional phonon-mediated superconductivity, and we identify clear fingerprints in the doping dependence of Tc, which enable experiments to distinguish between different pairing mechanisms.

【 授权许可】

Free