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• W4385949727 abstract "The magnetic element Mn is generally supposed to be harmful to superconductivity. However, the superconducting transition temperature of ${mathrm{Ti}}_{1ensuremath{-}x}{mathrm{Mn}}_{x}$ can be enhanced from 0.4 K (elemental titanium) to about 2.1--2.8 K by doping Mn to the system. Here, we carry out systematic studies on the superconductivity and normal state properties of ${mathrm{Ti}}_{1ensuremath{-}x}{mathrm{Mn}}_{x}$ alloys. With the increase of Mn doping in ${mathrm{Ti}}_{1ensuremath{-}x}{mathrm{Mn}}_{x}$, we find that the system transforms from hexagonal $ensuremath{alpha}$ phase ($P{6}_{3}/mmc$) to cubic $ensuremath{beta}$ phase ($Imoverline{3}m$), and the superconducting property changes from filamentary to bulk superconductivity. Thus we argue that the superconductivity in the $ensuremath{alpha}$ phase with dilute Mn doping is not intrinsic; it may be induced by the residual $ensuremath{beta}$ phase embedded in the $ensuremath{alpha}$ phase. Moreover, in ${mathrm{Ti}}_{0.88}{mathrm{Mn}}_{0.12}$, we find a positive Hall coefficient with a significant reduction of charge-carrier density, which is in contrast to pure Ti where the Hall coefficient is negative. The specific-heat data of ${mathrm{Ti}}_{1ensuremath{-}x}{mathrm{Mn}}_{x}$ with $x=0.12$ can be described by the model of $s$-wave symmetry with a fully opened gap of 0.37 meV. Transport measurements show that it is a type-II superconductor with a relatively large value of Wilson ratio (${R}_{text{W}}=3.1$) in the normal state, which suggests a moderate electron correlation in ${mathrm{Ti}}_{1ensuremath{-}x}{mathrm{Mn}}_{x}$ with the $ensuremath{beta}$ phase. The positive correlation between magnetic susceptibility and temperature, and the sudden drop of effective magnetic moment in ${mathrm{Ti}}_{1ensuremath{-}x}{mathrm{Mn}}_{x}$ with $x=0.12$ may suggest that the material shows a signature of the existence of spin fluctuations." @default.
• W4385949727 created "2023-08-18" @default.
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• W4385949727 date "2023-08-17" @default.
• W4385949727 modified "2023-10-15" @default.
• W4385949727 title "Enhanced superconductivity in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>Ti</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Mn</mml:mi><mml:mi>x</mml:mi></mml:msub></mml:math> alloys through Mn doping" @default.
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• W4385949727 doi "https://doi.org/10.1103/physrevb.108.054516" @default.
• W4385949727 hasPublicationYear "2023" @default.
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