R
Rajesh Narayanan
Researcher at Indian Institute of Technology Madras
Publications - 49
Citations - 630
Rajesh Narayanan is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Quantum phase transition & Phase transition. The author has an hindex of 15, co-authored 47 publications receiving 549 citations. Previous affiliations of Rajesh Narayanan include Asia Pacific Center for Theoretical Physics & University of Hong Kong.
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Emerging Criticality in the Disordered Three-Color Ashkin-Teller Model
TL;DR: In this paper, the effects of quenched disorder on the first-order phase transition in the two-dimensional three-color Ashkin-Teller model were studied by means of large-scale Monte Carlo simulations.
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Quantum critical behavior of clean itinerant ferromagnets
TL;DR: In this article, the quantum ferromagnetic transition at zero temperature in clean itinerant electron systems is considered, and it is shown that the Landau-Ginzburg-Wilson order parameter field theory breaks down since the electron-electron interaction leads to singular coupling constants in the LGW functional.
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Breathing chromium spinels: a showcase for a variety of pyrochlore Heisenberg Hamiltonians
Pratyay Ghosh,Yasir Iqbal,Tobias Müller,Ravi T. Ponnaganti,Ronny Thomale,Rajesh Narayanan,Johannes Reuther,Johannes Reuther,Michel J. P. Gingras,Michel J. P. Gingras,Harald Olaf Jeschke +10 more
TL;DR: In this article, the long-standing problem of the microscopic origin of the richly diverse phenomena in the chromium breathing pyrochlore material family was addressed by combining electronic structure and renormalization group techniques.
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Dissipative spin dynamics near a quantum critical point: Numerical Renormalization Group and Majorana diagrammatics
TL;DR: In this paper, the authors provide an extensive study of the sub-ohmic spin-boson model with power law density of states J(omega)=\omega^s (with 0 < s < 1), focusing on the equilibrium dynamics of the three possible spin components, from very weak dissipation to the quantum critical regime.
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Quantum paramagnetism and helimagnetic orders in the Heisenberg model on the body centered cubic lattice
Pratyay Ghosh,Tobias Müller,Francesco Parisen Toldin,Johannes Richter,Johannes Richter,Rajesh Narayanan,Ronny Thomale,Johannes Reuther,Yasir Iqbal +8 more
TL;DR: In this article, the authors investigate whether strong frustration effects can lead to melting of the magnetic orders and have the potential to stabilize quantum spin liquid phases in three dimensions. But their results indicate that strong frustration does not lead to the melting of magnetic orders.