Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Yarlagadda, Sudhakar"'
Publikováno v:
Phys. Rev. B 104, 035132 (2021)
We report a pervasive phenomenon of gradual emergence of negative magnetization in typical $R_{1-x}D_x$MnO$_3$ orthorhombic perovskite manganites in nano form (with $R^{3+}$ being a trivalent high-magnetic-moment ion from the heavier rare-earth eleme
Externí odkaz:
http://arxiv.org/abs/2104.04933
Publikováno v:
Phys. Rev. B 101, 035147 (2020)
We use Quantum Monte Carlo method employing stochastic-series-expansion technique to study the ground state properties of the $t_2-V_1$ model on a square lattice. We find that, away from half-fillings, the minimal combination of nearest-neighbor repu
Externí odkaz:
http://arxiv.org/abs/1902.10091
Autor:
Paul, Sanjukta, Yarlagadda, Sudhakar
Understanding the coexistence of ferromagnetism and insulating behavior in manganites is an unsolved problem. We propose a localized-band model involving effective intermediate-range electron-electron (electron-hole) repulsion (attraction) generated
Externí odkaz:
http://arxiv.org/abs/1805.05172
Autor:
Paul, Sanjukta, Pankaj, Ravindra, Yarlagadda, Sudhakar, Majumdar, Pinaki, Littlewood, Peter B.
Obtaining strong magnetoelectric couplings in bulk materials and heterostructures is an ongoing challenge. We demonstrate that manganite heterostructures of the form ${\rm (Insulator)/(LaMnO_3)_n/(CaMnO_3)_n/(Insulator)}$ show strong multiferroicity
Externí odkaz:
http://arxiv.org/abs/1702.06302
Understanding the basic physics related to archetypal lithium battery material (such as LiCo$_y$Mn$_{2-y}$O$_{4}$) is of considerable interest and is expected to aid designing of cathodes of high capacity. The relation between electrochemical perform
Externí odkaz:
http://arxiv.org/abs/1612.07092
Autor:
Ghosh, Amrita, Yarlagadda, Sudhakar
Publikováno v:
Phys. Rev. B 96, 125108 (2017)
Understanding the microscopic mechanism of coexisting long-range orders (such as lattice supersolidity) in strongly correlated systems is a subject of immense interest. We study the possible manifestations of long-range orders, including lattice-supe
Externí odkaz:
http://arxiv.org/abs/1610.01447
Autor:
Pankaj, Ravindra, Yarlagadda, Sudhakar
We derive an effective Hamiltonian that takes into account the quantum nature of phonons and models cooperative Jahn-Teller effect in the adiabatic regime and at strong electron-phonon coupling in one dimension. Our approach involves mapping a strong
Externí odkaz:
http://arxiv.org/abs/1608.06055
Autor:
Pankaj, Ravindra, Yarlagadda, Sudhakar
Studying the nature and consequences of electron-phonon interaction in manganites is an area of intense ongoing research. Here, in an attempt to model charge and orbital ordering in manganites displaying C-type antiferromaganetism, we study cooperati
Externí odkaz:
http://arxiv.org/abs/1501.06421
Autor:
Kar, Satyaki, Yarlagadda, Sudhakar
Exploring supersolidity in naturally occurring and artificially designed systems has been and will continue to be an area of immense interest. Here, we study how superfluid and charge-density-wave (CDW) states cooperate or compete in a minimal model
Externí odkaz:
http://arxiv.org/abs/1501.04528
Autor:
Dey, Amit, Yarlagadda, Sudhakar
We study two anisotropically interacting spins coupled to optical phonons; we restrict our analysis to the regime of strong coupling to the environment, to the antiadiabatic region, and to the subspace with zero value for $S^z_T$ (the z-component of
Externí odkaz:
http://arxiv.org/abs/1309.5824