Geetanjali Giri

BaFe 2 Se 3 : A quasiunidimensional noncentrosymmetric superconductor

Shiyu Deng, Aye Roll, W. G. Zheng, Geetanjali Giri et autres

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Evidence for an electromagnon in GdMn2O5 : A multiferroic with a large electric polarization

A. Vaunat, V. Balédent, S. Petit, Partha Sarathi Roy et autres

We report in this paper the dynamical properties of ${\mathrm{GdMn}}_{2}{\mathrm{O}}_{5}$ studied by inelastic neutron scattering and infrared spectroscopy assisted by ab initio calculations. Our work sheds light on the electromagnon, a magnetic mode that can be excited by an electric field. Combining …

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Theoretical Studies of Skewed Spin Ladders and Polycyclic Aromatic Hydrocarbons

Geetanjali Giri

A simple scheme for finding magnetic aromatic hydrocarbon molecules

Alexandra Valentim, G. A. Bocan, Javier D. Fuhr, Daniel J. García et autres

We introduce a simple computational procedure to screen large sets of molecules and identify likely candidates to exhibit magnetism. We consider small molecules that combine azulenes and naphthalenes and find two new magnetic molecules.

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A Simple Scheme for FInding Magnetic Aromatic Hydrocarbon Molecules

Alexandra Valentim, G. A. Bocan, Javier D. Fuhr, Daniel J. Garcia et autres

The smallest magnetic aromatic hydrocarbons reported to date consist of at least six fused- azulene. In order to determine the magnetic state of a given molecule computationally- demanding state-of-the-art methods, such as DMRG or DFT, are required. We introduce a simple computational …

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A Simple Scheme for FInding Magnetic Aromatic Hydrocarbon Molecules

Alexandra Valentim, G. A. Bocan, Javier D. Fuhr, Daniel J. Garcia et autres

The smallest magnetic aromatic hydrocarbons reported to date consist of at least six fused- azulene. In order to determine the magnetic state of a given molecule computationally- demanding state-of-the-art methods, such as DMRG or DFT, are required. We introduce a simple computational …

br (code pays fourni par la source)

Correlated Electronic States of a Few Polycyclic Aromatic Hydrocarbons: A Computational Study

Geetanjali Giri, Y. Anusooya Pati, Sheela K. Ramasesha

In recent years, polycyclic aromatic hydrocarbons (PAHs) have been studied for their electronic properties as they are viewed as nanodots of graphene. They have also been of interest as functional molecules for applications such as light-emitting diodes and solar cells. Since the …

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A Model Exact Study of the Properties of Low-Lying Electronic States of Perylene and Substituted Perylenes

Geetanjali Giri, Suryoday Prodhan, Y. Anusooya Pati, Sheela K. Ramasesha

There is a resurgence of interest in the electronic structure of perylene for its applications in molecular devices such as organic photovoltaics and organic light-emitting diodes. In this study, we have obtained the low-lying singlet states of perylene by exactly solving the …

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Quantum phases of frustrated two-leg spin- 12 ladders with skewed rungs

Geetanjali Giri, Dayasindhu Dey, Manoranjan Kumar, Sheela K. Ramasesha et autres

The quantum phases of two-leg spin-$\frac{1}{2}$ ladders with skewed rungs are obtained using exact diagonalization of systems with up to 26 spins and by density-matrix renormalization-group calculations to 500 spins. The ladders have isotropic antiferromagnetic (AF) exchange ${J}_{2}>0$ between first neighbors in …

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