TY - JOUR
T1 - The transition-metal-dichalcogenide family as a superconductor tuned by charge density wave strength
AU - Simon, Shahar
AU - Yerzhakov, Hennadii
AU - K. P, Sajilesh
AU - Vakahi, Atzmon
AU - Remennik, Sergei
AU - Ruhman, Jonathan
AU - Khodas, Maxim
AU - Millo, Oded
AU - Steinberg, Hadar
N1 - Publisher Copyright:
© The Author(s) 2024.
PY - 2024/12
Y1 - 2024/12
N2 - In metallic transition metal dichalcogenides (TMDs), which remain superconducting down to single-layer thickness, the critical temperature Tc decreases for Nb-based, and increases for Ta-based materials. This contradicting trend is puzzling, impeding the development of a unified theory. Here we study the thickness-evolution of superconducting tunneling spectra in TaS2heterostructures. The upper critical field Hc2 is strongly enhanced towards the single-layer limit – following Hc2∝Tc2. The same ratio holds for the entire family of intrinsically metallic 2H-TMDs, covering 4 orders of magnitude in Hc2. Using Gor’kov’s theory, we calculate the suppression of Tc by the competing charge density wave (CDW) order, which affects the quasiparticle density of states and the resulting Tc and Hc2. The latter is found to be universally enhanced by two orders of magnitude. Our results substantiate CDW as the key determinant factor limiting Tc across the TMD family.
AB - In metallic transition metal dichalcogenides (TMDs), which remain superconducting down to single-layer thickness, the critical temperature Tc decreases for Nb-based, and increases for Ta-based materials. This contradicting trend is puzzling, impeding the development of a unified theory. Here we study the thickness-evolution of superconducting tunneling spectra in TaS2heterostructures. The upper critical field Hc2 is strongly enhanced towards the single-layer limit – following Hc2∝Tc2. The same ratio holds for the entire family of intrinsically metallic 2H-TMDs, covering 4 orders of magnitude in Hc2. Using Gor’kov’s theory, we calculate the suppression of Tc by the competing charge density wave (CDW) order, which affects the quasiparticle density of states and the resulting Tc and Hc2. The latter is found to be universally enhanced by two orders of magnitude. Our results substantiate CDW as the key determinant factor limiting Tc across the TMD family.
UR - http://www.scopus.com/inward/record.url?scp=85211121751&partnerID=8YFLogxK
U2 - 10.1038/s41467-024-54517-2
DO - 10.1038/s41467-024-54517-2
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C2 - 39616172
AN - SCOPUS:85211121751
SN - 2041-1723
VL - 15
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 10439
ER -