Avinash Singh

Publications (2006-2015)

47. Correlation Effects in a Band Ferromagnet:
Spin-Rotationally Symmetric Study with Self-Energy and Vertex Corrections
Avinash Singh
Phys. Rev. B 74, 224437 (2006)  

48. Clustering Induced Suppression of Ferromagnetism in Diluted Magnets
Avinash Singh
Phys. Rev. B 75, 035206 (2007)

49. Spin Dynamics in the Diluted Ferromagnetic Kondo Lattice Model
Avinash Singh, Subrat Kumar Das, Anand Sharma, and Wolfgang Nolting
J. Phys.: Condens. Matter 19, 236213 (2007)

50. Ferromagnetism in the t-t' Hubbard Model: Interplay of Lattice, Band Dispersion,
and Interaction Effects studied within a Goldstone-Mode Preserving Scheme
Sudhakar Pandey and Avinash Singh
Phys. Rev. B 75, 064412  (2007)

51. Quantum and Thermal Fluctuations in the 2D Correlated Band Ferromagnet ---
Goldstone-Mode Preserving Investigation with Self-Energy and Vertex Corrections
Sudhakar Pandey and Avinash Singh
Phys. Rev. B  76, 104437 (2007)

52. Spin Dynamics of YMnO₃ and its Anisotropic Hubbard Model Analysis
Tapan Chatterji, S Ghosh, Avinash Singh, L P Regnault, M Rheinstadter, G J Mcintyre, and T Lonkai
Phys. Rev. B  76, 144406 (2007)

53. High-Energy Kink in the Dispersion of a Hole in an Antiferromagnet ---
Double-Occupancy Effects on Electronic Excitations
Pooja Srivastava, Saptarshi Ghosh, and Avinash Singh
Phys. Rev. B  76, 184435 (2007)

54. Anisotropic Hubbard Model on a Triangular Lattice --- Spin Dynamics in HoMnO₃
Saptarshi Ghosh and Avinash Singh
Pramana  70, 163 (2008)

55. Spin-Wave Excitations and Low-Temperature Magnetization in GaMnAs
M Sperl, Avinash Singh, U Wurstbauer, S K Das, A Sharma, M Hirmer, W Nolting,
C H Back, W Wegscheider, and G Bayreuther
Phys. Rev. B  77, 125212 (2008)

56. Correlation Effects on Magnetic Frustration in the Triangular-Lattice Hubbard Model
Saptarshi Ghosh and Avinash Singh
Phys. Rev. B 77, 094430 (2008)

57. Fermionic Representation for the Ferromagnetic Kondo Lattice Model ---
Diagrammatic Study of Spin-Charge Coupling Effects on Magnon Excitations
Sudhakar Pandey, Subrat Kumar Das, Bhaskar Kamble, Saptarshi Ghosh,
Dheeraj Kumar Singh, Rajyavardhan Ray, and Avinash Singh
Phys. Rev. B 77, 134447 (2008)

58. Spin-Charge Coupling in a Band Ferromagnet:
Magnon-Energy Renormalization, Anomalous Softening, and Damping 
Sudhakar Pandey and Avinash Singh
Phys. Rev. B 78, 014414 (2008)

59. Orbital Degeneracy, Hund's Coupling, and Band Ferromagnetism ---
Effective Quantum Parameter, Suppression of Quantum Corrections, and Enhanced Stability
Bhaskar Kamble and Avinash Singh
Phys. Rev. B 79, 064410 (2009)

60. Orbital Fluctuations, Spin-Orbital Coupling, and Anomalous Magnon Softening
in an Orbitally Degenerate Ferromagnet
Dheeraj Kumar Singh, Bhaskar Kamble, and Avinash Singh
Phys. Rev. B 81, 064430 (2010) (Featured in Kaleidoscope)

61. Spin-Charge and Spin-Orbital Coupling Effects
on Spin Dynamics in Ferromagnetic Manganites
Dheeraj Kumar Singh, Bhaskar Kamble, and Avinash Singh
J. Phys.: Condens. Matter 22 (2010) 396001

62. Role of Correlated Electron Spin Dynamics on the Finite-Temperature
Magnetization Behavior of an Itinerant Ferromagnet
Sudhakar Pandey and Avinash Singh
Bulletin of the American Physical Society 55 (2010)
Abstract ID: BAPS.2010.MAR.B33.11

63. Spin Waves in the (0, π) and (0, π, π) Ordered SDW States of the t-t' Hubbard Model:
Application to Doped Iron Pnictides
Nimisha Raghuvanshi and Avinash Singh
J. Phys.: Condens. Matter 22 (2010) 422202 (FAST TRACK COMMUNICATION)
Selected for inclusion in IOP Select (http://Select.iop.org)

64. Signature Effects of Spin Clustering and Distribution of Spin Couplings on
Magnetization Behaviour of Ni-Fe-Mo and Ni-Fe-W Alloys
Mitali Banerjee, Avinash Singh, A K Majumdar, and A K Nigam
J. Phys.: Condens. Matter 23 (2011) 306004

65. Role of Hund's Coupling on Stability of the SDW State in Iron Pnictides
Nimisha Raghuvanshi and Avinash Singh
J. Phys.: Condens. Matter 23 (2011) 312201 (FAST TRACK COMMUNICATION)

66. Exact Eigenstates Analysis of Finite Frequency Conductivity in Graphene
Rajyavardhan Ray and Avinash Singh
arXiv: 1105.2354 (2011);   [R Ray, Eur. Phys. J. B (2012) 85: 334]

67. Magnetic Excitations in Iron Pnictides
Nimisha Raghuvanshi, Sayandip Ghosh, Rajyavardhan Ray, Dheeraj Kumar Singh, and Avinash Singh
arXiv: 1106.4421 (2011)

(xi) Quantum Antiferromagnetism in the Hubbard Model on a Honeycomb Lattice:
Roton-like Structure in Magnetic Excitations, Quantum Corrections to Sublattice Magnetization,
and Electron Self Energy Corrections 
Rajyavardhan Ray and  Avinash Singh (2012)

68. Onset and Melting of Local Orbital Order
Avinash Singh and Dheeraj Kumar Singh
J. Phys.: Condens. Matter 24 (2012) 086003

69. An Effective Quantum Parameter for Strongly Correlated Metallic Ferromagnets
Bhaskar Kamble and Avinash Singh
J. Phys.: Condens. Matter 24 (2012) 086004

70. Magnon Self Energy in the Correlated Ferromagnetic Kondo Lattice Model:
Spin-Charge Coupling Effects on Magnon Excitations in Manganites
Dheeraj Kumar Singh and Avinash Singh
Phys. Rev. B 88, 144410 (2013)

71. The Role of Orbital Order in the Stabilization of the (π, 0) Ordered
Magnetic State in a Minimal Two-Band Model for Iron Pnictides
Sayandip Ghosh and Avinash Singh
J. Appl. Physics, 115,  103907 (2014)

72. Electronic Structure, Spin Excitations, and Orbital Ordering
in a Minimal Three Band Model for Iron Pnictides
Sayandip Ghosh and Avinash Singh
New J. Phys. 17, 063009 (2015)

73. Magneto-Orbital Coupling in Iron Pnictides
Sayandip Ghosh, Nimisha Raghuvanshi, and Avinash Singh
Journal of Magnetism and Magnetic Materials, 405, 264 (2016) 

74. Orbital Order, Spin Waves, and Doping Effects in the (π, 0) SDW State ---
Comparative Study of Three Band Models for Iron Pnictides
Nimisha Raghuvanshi and Avinash Singh
arXiv: 1510.02276 (2015) 

75. Multi-Orbital Quantum Antiferromagnetism in Iron Pnictides ---
Effective Spin Couplings and Quantum Corrections to Sublattice Magnetization
Sayandip Ghosh, Nimisha Raghuvanshi, Shubhajyoti Mohapatra,
Ashish Kumar, and Avinash Singh
J. Phys.: Condens. Matter 28, 366002 (2016)

76. Spin Waves in the AF State of the t-t' Hubbard Model on the FCC Lattice:
Competing Interactions, Frustration, and Instabilities
Avinash Singh, Shubhajyoti Mohapatra, Timothy Ziman, and Tapan Chatterji
J. Appl. Phys. 121, 073903 (2017)

77. Stabilization of Magnetic Order in Composite Spin-Charge Ordered States
on Frustrated Lattices: Application to Doped Iron Pnictides, Sodium Cobaltates,
Rare-Earth Pnictides and Actinide Compounds
Sayandip Ghosh and Avinash Singh
(in preparation) 

78. Magnetic Excitations in a Three-Orbital Model for the
Strongly Spin-Orbit Coupled Iridates:
Effect of Mixing between the J=1/2 and 3/2 Sectors
Shubhajyoti Mohapatra, Jeroen van den Brink, and Avinash Singh
Phys. Rev. B 95, 094435 (2017)

79. Electronic Band Structure, Magnetic Excitations, and Magneto-Crystalline Anisotropy
in a Three-Orbital Model for the Strongly Spin-Orbit Coupled Osmate
Avinash Singh, Shubhajyoti Mohapatra, Churna Bhandari, and Sashi Satpathy
(in preparation)