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The journey through the nontrivial band topology beyond the conventional bandstructure has resulted in the recent discovery of three-dimensional Diracsemimetal phase in Na$_{3}$Bi and Cd$_{3}$As$_{2}$. The bulk state of which issemi-metallic obeying linear energy dispersion, while the surface state istopology protected Fermi arc. Due to the unique band topology, they showdifferent exotic electronic properties of both fundamental and technologicalinterest. From electrical and thermal transport measurements, we havedemonstrated a remarkable violation of Wiedemann-Franz law (WFL) underapplication of magmatic field in Cd$_{3}$As$_{2}$ and the violation becomesmore and more drastic with increasing magnetic field strength. Whereas thevalidity of WFL is the key feature of Landau Fermi-liquid theory in metal, thenotion of quasiparticles is the building block to this theory. This impliesthat the fundamental concept of Landau quasiparticle no longer holds inCd$_{3}$As$_{2}$ in presence of magnetic field. The continuous break down ofLandau quasiparticle framework with field introduces a concept of field inducedquantum critical point (QCP) as in the case of heavy fermion compoundsYbRh$_{2}$Si$_{2}$, Sr$_{3}$Ru$_{2}$O$_{7}$, etc.

Magnetic field induced drastic violation of Wiedemann-Franz law in Dirac semimetal Cd$_{3}$As$_{2}$