In this paper we detail (i) the crystal growth methodology, (ii) structural analysis via single‑crystal X‑ray diffraction (SCXRD) and neutron diffraction, (iii) comprehensive physical‑property measurements confirming bulk superconductivity, and (iv) DFT‑based theoretical insights into the pairing mechanism.
Figure 1 displays the refined crystal structure of Xhmster‑44. The structure consists of (Xh = 0.5 K + 0.5 La) and TiSe₂ slabs . The Ti atoms form a square planar network coordinated by four Se atoms (Ti–Se = 2.53 Å). The Xh ions reside in the van der Waals gap, providing an average valence of +1.5, which donates electrons to the TiSe₂ layers. xhmster 44
The quest for superconductors with high critical temperatures (T_c) continues to drive research across condensed‑matter physics and materials science. Since the discovery of cuprate high‑T_c superconductors in the 1980s, layered transition‑metal chalcogenides (TMCs) such as FeSe, NbSe₂, and the more recent nickelates have emerged as fertile ground for novel superconductivity due to their quasi‑two‑dimensional electronic structures and tunable carrier densities [1‑3]. In this paper we detail (i) the crystal
As we navigate the vast and ever-changing landscape of the internet, terms like "xhmster 44" remind us of the platform's role not just as a source of information, but as a catalyst for engagement, creativity, and the forging of new communities. The Ti atoms form a square planar network
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The electronic band structure (Fig. 5a) shows multiple Ti‑derived d‑bands crossing the Fermi level, producing a high density of states N(E_F) ≈ 3.1 states eV⁻¹ f.u.⁻¹. Phonon dispersion (Fig. 5b) reveals a soft mode at the Γ point (Ω ≈ 12 meV) strongly coupled to electrons. The calculated electron‑phonon coupling constant and logarithmic average phonon frequency ω_log = 115 K give a McMillan‑Allen‑Dynes T_c ≈ 45 K (μ* = 0.10), in excellent agreement with experiment.