S. Saha

The spin $- 1/2$ chain with ferromagnetic exchange $J_{1} < 0$ between first neighbors and antiferromagnetic $J_{2} > 0$ between second neighbors supports two spin-Peierls (SP) instabili…

cond-mat.str-el2021★ 3 cited

Low temperature thermodynamics of the antiferromagnetic $J_{1} - J_{2}$ model: Entropy, critical points and spin gap

Sudip Kumar Saha, Manodip Routh, Manoranjan Kumar +1

The antiferromagnetic $J_{1} - J_{2}$ model is a spin-1/2 chain with isotropic exchange $J_{1} > 0$ between first neighbors and $J_{2} = α J_{1}$ between second neighbors. The model supports bo…

cond-mat.str-el2021★ 3 cited

Density matrix renormalization group approach to the low temperature thermodynamics of correlated 1D fermionic models

Sudip Kumar Saha, Debasmita Maiti, Manoranjan Kumar +1

The low temperature thermodynamics of correlated 1D fermionic models with spin and charge degrees of freedom is obtained by exact diagonalization (ED) of small systems and followed…

cond-mat.mtrl-sci2020★ 7 cited

Topological transitions to Weyl states in bulk Bi $_{2}$ Se $_{3}$ : Effect of hydrostatic pressure and doping

Sudip Kumar Saha, Hrishit Banerjee, Manoranjan Kumar

Bi $_{2}$ Se $_{3}$ , a layered three dimensional (3D) material, exhibits topological insulating properties due to presence of surface states and a band gap of 0.3 eV in the bulk. We study…

cond-mat.str-el2020★ 1 cited

Bond-bond correlations, gap relations and thermodynamics of spin- $1/2$ chains with spin-Peierls transitions and bond-order-wave phases

Sudip Kumar Saha, Manoranjan Kumar, Zoltán G. Soos

The spin- $1/2$ chain with antiferromagnetic exchange $J_{1}$ and $J_{2} = α J_{1}$ between first and second neighbors, respectively, has both gapless and gapped ( $Δ (α) > 0$ ) quantum phase…

cond-mat.str-el2020★ 15 cited

Modeling the spin-Peierls transition of spin- $1/2$ chains with correlated states: $J_{1} - J_{2}$ model, CuGeO $_{3}$ and TTF-CuS $_{4}$ C $_{4}$ (CF $_{3}$ ) $_{4}$

Sudip Kumar Saha, Monalisa Singh Roy, Manoranjan Kumar +1

The spin-Peierls transition at $T_{S P}$ of spin- $1/2$ chains with isotropic exchange interactions has previously been modeled as correlated for $T > T_{S P}$ and mean field for $T <…

Spin Peierls transition of J1​−J2​ and extended models with ferromagnetic J1​.Sublattice dimerization and thermodynamics of zigzag chains in β-TeVO4​

Low temperature thermodynamics of the antiferromagnetic J1​−J2​ model: Entropy, critical points and spin gap

Density matrix renormalization group approach to the low temperature thermodynamics of correlated 1D fermionic models

Topological transitions to Weyl states in bulk Bi2​Se3​: Effect of hydrostatic pressure and doping

Bond-bond correlations, gap relations and thermodynamics of spin-1/2 chains with spin-Peierls transitions and bond-order-wave phases

Modeling the spin-Peierls transition of spin-1/2 chains with correlated states: J1​−J2​ model, CuGeO3​ and TTF-CuS4​C4​(CF3​)4​

Spin Peierls transition of $J_{1} - J_{2}$ and extended models with ferromagnetic $J_{1}$ .Sublattice dimerization and thermodynamics of zigzag chains in $β$ -TeVO $_{4}$

Low temperature thermodynamics of the antiferromagnetic $J_{1} - J_{2}$ model: Entropy, critical points and spin gap

Topological transitions to Weyl states in bulk Bi $_{2}$ Se $_{3}$ : Effect of hydrostatic pressure and doping

Bond-bond correlations, gap relations and thermodynamics of spin- $1/2$ chains with spin-Peierls transitions and bond-order-wave phases

Modeling the spin-Peierls transition of spin- $1/2$ chains with correlated states: $J_{1} - J_{2}$ model, CuGeO $_{3}$ and TTF-CuS $_{4}$ C $_{4}$ (CF $_{3}$ ) $_{4}$