Chiral superconductivity in the alternate stacking compound 4Hb-TaS,

A. Ribak, R. M. Skiff, M. Mograbi, P. K. Rout, M. H. Fischer, J. Ruhman, K. Chashka, Y. Dagan, A. Kanigel

פרסום מחקרי: נייר עבודה / גרסה מוקדמתגרסה מוקדמת

תקציר

Layered van der Waals (vdW) materials are emerging as one of the most versatile directions in the field of quantum condensed matter physics. They allow an unprecedented control of electronic properties via stacking of different types of two-dimensional (2D) materials. A fascinating frontier, largely unexplored, is the stacking of strongly-correlated phases of matter in vdW materials. Here, we study 4Hb-TaS2, which naturally realizes an alternating stacking of a Mott insulator, recently reported as a gapless spin-liquid candidate(1T-TaS2), and a 2D superconductor (1H-TaS2). This raises the question of how these two components affect each other. We find a superconducting ground state with a transition temperature of 2.7K, which is significantly elevated compared to the 2H polytype (Tc=0.7K). Strikingly, the superconducting state exhibits signatures of time-reversal-symmetry breaking abruptly appearing at the superconducting transition, which can be naturally explained by a chiral superconducting state.
שפה מקוריתאנגלית
עמודים1-5
מספר עמודים5
כרך2225
סטטוס פרסוםפורסם - 13 מאי 2019

סדרות פרסומים

שםarXiv preprint arXiv:1905.,

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