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A Density Matrix Renormalization Group Method Study of Optical Properties of Porphines and Metalloporphines
Manoranjan Kumar, Y. Anusooya Pati, S. Ramasesha
The symmetrized Density-Matrix-Renormalization-Group (DMRG) method is used to study linear and nonlinear optical properties of Free base porphine and metallo-porphine. Long-range i…
Characterization of the Energy Structure and Adiabatic Magnetization Process of V15
Indranil Rudra, K. Saito, S. Ramasesha +1
The energy structure of the V is studied using exact diagonalization methods, and the adiabatic changes of the magnetization in the system with the sweeping field are invest…
Model Exact Low-Lying States and Spin Dynamics in Ferric Wheels; Fe to Fe
Indranil Rudra, S. Ramasesha, Diptiman Sen
Using an efficient numerical scheme that exploits spatial symmetries and spin-parity, we have obtained the exact low-lying eigenstates of exchange Hamiltonians for ferric wheels up…
Dynamic Oscillations of Magnetization in High Spin Magnetic Clusters
Indranil Rudra, S. Ramasesha
We have studied the time evolution of magnetization of a high spin magnetic cluster in the ground state, in the presence of a sinusoidal axial magnetic field and a static transvers…
Properties of low-lying states in some high-nuclearity Mn, Fe and V clusters: Exact studies of Heisenberg models
C. Raghu, Indranil Rudra, Diptiman Sen +1
Using an efficient numerical scheme that exploits spatial symmetries and spin parity, we have obtained the exact low-lying eigenstates of exchange Hamiltonians for the high nuclear…
Magnetization of Mn_12 Ac in a slowly varying magnetic field: an ab initio study
Indranil Rudra, S. Ramasesha, Diptiman Sen
Beginning with a Heisenberg spin Hamiltonian for the manganese ions in the Mn_12 Ac molecule, we find a number of low-energy states of the system. We use these states to solve the…