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We consider the Type-II seesaw model extended with another Higgs doublet,which is odd under the $Z_2$ symmetry. We look for the possibility oftriggering the electroweak symmetry breaking via radiative effects. The Higgsmass parameter changes sign from being positive at higher energy scales tonegative at lower energy scales in the presence of the TeV scalar triplet. ThePlanck scale perturbativity is demanded and the electroweak phase transition isstudied using two-loop $\beta$-functions. The maximum allowed values for theinteraction quartic coupling of the second doublet field and the triplet fieldwith the Higgs field are $\lambda_3=0.15$ and $\lambda_{\Phi_{1\Delta}}=0.50$,respectively. Considering these EW values, the first-order phase transition,i.e., $\phi_{+}(T_c)/T_c\sim 0.6$ is satisfied only for vanishing doublet andtriplet bare mass parameters, $m_{\Phi_2}=0.0$ GeV and $m_{\Delta}=0.0$ GeV.The small non-zero induced vacuum expectation value for the scalar triplet alsogenerates the neutrino mass, and the lightest stable neutral particle from theinert doublet satisfies the dark matter constraints for the chosen parameterspace. The impact of the thermal corrections on the stability of theelectroweak vacuum is also studied, and the current experimental values of theHiggs mass and the top mass lie in the stable region both at the zerotemperature and the finite temperature.

Electroweak phase transition with radiative symmetry breaking in Type-II seesaw with inert doublet