Research

Research Interests

  • Statistical Mechanics

  • Condensed Matter Physics

  • Disordered Systems

  • Soft Matter Physics

  • Physical Chemistry

  • Applied Mathematics

  • Computational Methods

    PhD Students

  • Leila Moueddene: Tricriticality in the Blume-Capel model at high dimensions (in progress, Coventry University & University of Lorraine, as second supervisor)

  • Alexandros Vasilopoulos: Universality and dynamical behaviour in pure and disordered spin-1 models (in progress, Coventry University, as director of studies)

  • Michail Akritidis: Percolation properties of ferromagnetic and frustrated replicated Ising models (completed in 2023, Coventry University, as director of studies)

  • Argyro Mainou: Scaling and universality in the random-field Ising model (completed in 2021, Coventry University, as director of studies)

  • Ravinder Kumar: Computer simulation studies of frustrated spin systems (completed in 2019, Coventry University & Leipzig University, as second supervisor)

  • Eren Metin Elcie: Algorithmic and geometric aspects of the random-cluster model (completed in 2015, Coventry University, as second supervisor)

    Publications

    83) Thermodynamic properties of disordered quantum spin ladders

    E. Vatansever, G.G. Grahovski, and N.G. Fytas

    arXiv:2312.12834

    82) Critical and tricritical singularities from small-scale Monte Carlo simulations: The Blume-Capel model in two dimensions

    L. Moueddene, N.G. Fytas, Y. Holovatch, R. Kenna, and B. Berche

    J. Stat. Mech. (2024) 023206

    81) Finite-size scaling of the random-field Ising model above the upper critical dimension

    N.G. Fytas, V. Martin-Mayor, G. Parisi, M. Picco, and N. Sourlas

    Phys. Rev. E 108, 044146 (2023)

    80) Geometric clusters in the overlap of the Ising model

    M. Akritidis, N.G. Fytas, and M. Weigel

    Phys. Rev. E 108, 044145 (2023)

    79) Critical dynamical behavior of the Ising model

    Z. Liu, E. Vatansever, G.T. Barkema, and N.G. Fytas

    Phys. Rev. E 108, 034118 (2023)

    78) Two-dimensional dilute Baxter-Wu model: Transition order and universality

    A.R.S. Macedo, A. Vasilopoulos, M. Akritidis, J.A. Plascak, N.G. Fytas, and M. Weigel

    Phys. Rev. E 108, 024140 (2023)

    77) Disorder effects on the metastability of classical Heisenberg ferromagnets

    M. Naskar, M. Acharyya, E. Vatansever, and N.G. Fytas

    Phys. Rev. E 108, 014121 (2023)

    76) Transient behavior of damage spreading in the two-dimensional Blume-Capel ferromagnet

    A. Bhowal Acharyya, M. Acharyya, E. Vatansever, and N.G. Fytas

    J. Stat. Phys. 190, 1 (2023)

    75) Universality in the two-dimensional dilute Baxter-Wu model

    A. Vasilopoulos, N.G. Fytas, E. Vatansever, A. Malakis, and M. Weigel

    Phys. Rev. E 105, 054143 (2022)

    74) Determination of the recombination coefficient in electrolytic solutions from impedance spectroscopy measurements

    G. Barbero, N.G. Fytas, I. Lelidis, J.V. da Silva Andrade, F.C.M. Freire, and A.J. Santana

    J. Electroanal. Chem. 907, 116070 (2022)

    73) Efficient algorithms for computing the ground states of the 2D random-field Ising model

    A. Mainou, N.G. Fytas, and M. Weigel

    J. Phys.: Conf. Ser. 2207, 012009 (2022)

    72) Corrections to scaling in geometrical clusters of the 2D Ising model

    M. Akritidis, N.G. Fytas, and M. Weigel

    J. Phys.: Conf. Ser. 2207, 012004 (2022)

    71) Multicanonical simulations of the spin-1 Baxter-Wu model in a crystal field

    N.G. Fytas, A. Vasilopoulos, E. Vatansever, A. Malakis, and M. Weigel

    J. Phys.: Conf. Ser. 2207, 012008 (2022)

    70) (Editorial) XXXII IUPAP Conference on Computational Physics

    D. Foster, N.G. Fytas, C. del Genio, R. Holtzman, A. Kumar, S. Horn, A. Potherat, M. Weigel, and T. Yavorskyi

    J. Phys.: Conf. Ser. 2207, 011001 (2022)

    69) Monte Carlo study of the two-dimensional kinetic Blume-Capel model in a quenched random crystal field

    A. Vasilopoulos, Z. Demir Vatansever, E. Vatansever, and N.G. Fytas

    Phys. Rev. E 104, 024108 (2021)

    68) Metastable behavior of the spin-s Ising and Blume-Capel ferromagnets: A Monte Carlo study

    M. Naskar, M. Acharyya, E. Vatansever, and N.G. Fytas

    Phys. Rev. E 104, 014107 (2021)

    67) Ising universality in the two-dimensional Blume-Capel model with quenched random crystal field

    E. Vatansever, Z. Demir Vatansever, P.E. Theodorakis, and N.G. Fytas

    Phys. Rev. E 102, 062138 (2020)

    66) Mixing-demixing transition in polymer-grafted spherical nanoparticles

    P. Yatsyshin, N.G. Fytas, and P.E. Theodorakis

    Soft Matter 16, 703 (2020)

    65) On the critical exponent α of the 5D random-field Ising model

    N.G. Fytas, V. Martin-Mayor, G. Parisi, M. Picco, and N. Sourlas

    J. Stat. Mech. (2019) 093203

    64) Evidence for supersymmetry in the random-field Ising model at D = 5

    N.G. Fytas, V. Martin-Mayor, G. Parisi, M. Picco, and N. Sourlas

    Phys. Rev. Lett. 122, 240603 (2019)

    63) Monte Carlo study of the interfacial adsorption of the Blume-Capel model

    N.G. Fytas, A. Mainou, P.E. Theodorakis, and A. Malakis

    Phys. Rev. E 99, 012111 (2019)

    62) Review of recent developments in the random-field Ising model

    N.G. Fytas, V. Martin-Mayor, M. Picco, and N. Sourlas

    J. Stat. Phys. 172, 665 (2018)

    61) Dynamic phase transitions in the presence of quenched randomness

    E. Vatansever and N.G. Fytas

    Phys. Rev. E 97, 062146 (2018)

    60) Universality from disorder in the random-bond blume-Capel model

    N.G. Fytas, J. Zierenberg, P.E. Theodorakis, M. Weigel, W. Janke, and A. Malakis

    Phys. Rev. E 97, 040102(R) (2018)

    59) Dynamic phase transition of the Blume-Capel model in an oscillating magnetic field

    E. Vatansever and N.G. Fytas

    Phys. Rev. E 97, 012122 (2018)

    58) Restoration of dimensional reduction in the random-field Ising model at five dimensions

    N.G. Fytas, V. Martin-Mayor, M. Picco, and N. Sourlas

    Phys. Rev. E 95, 042117 (2017)

    57) Scaling and universality in the phase diagram of the 2D Blume-Capel model

    J. Zierenberg, N.G. Fytas, M. Weigel, W. Janke, and A. Malakis

    Eur. Phys. J. Special Topics 226, 789 (2017)

    56) (Editorial) Recent advances in phase transitions and critical phenomena

    M. Bachmann, E. Bittner, N.G. Fytas, R. Kenna, M. Weigel, and J. Zierenberg

    Eur. Phys. J. Special Topics 226, 533 (2017)

    55) Specific-heat exponent and modified hyperscaling in the 4D random-field Ising model

    N.G. Fytas, V. Martin-Mayor, M. Picco, and N. Sourlas

    J. Stat. Mech. (2017) 033302

    54) Interfacial adsorption in 2D pure and random-bond Potts models

    N.G. Fytas, P.E. Theodorakis, and A. Malakis

    Phys. Rev. E 95, 032126 (2017)

    53) Revisiting the scaling of the specific heat of the three-dimensional random-field Ising model

    N.G. Fytas, P.E. Theodorakis, and A.K. Hartmann

    Eur. Phys. J. B 89, 200 (2016)

    52) Efficient numerical methods for the random-field Ising model: Finite-size scaling, reweighting extrapolation, and computation of response functions

    N.G. Fytas and V. Martin-Mayor

    Phys. Rev. E 93, 063308 (2016)

    51) Geometry effects in the magnetoconductance of normal and Andreev Sinai billiards

    N.G. Fytas

    Eur. Phys. J. B 89, 148 (2016)

    50) Phase transitions in disordered systems: the example of the random-field Ising model in four dimensions

    N.G. Fytas, V. Martin-Mayor, M. Picco, and N. Sourlas

    Phys. Rev. Lett. 116, 227201 (2016)

    49) Connectivity properties of the random-cluster model

    M. Weigel, E.M. Elcie, and N.G. Fytas

    J. Phys.: Conf. Ser. 681, 01201 (2016)

    48) Bridges in the random-cluster model

    E.M. Elcie, M. Weigel, and N.G. Fytas

    Nucl. Phys. B 903, 19 (2016)

    47) Universality in four-dimensional random-field magnets

    N.G. Fytas and P.E. Theodorakis

    Eur. Phys. J. B 88, 205 (2015)

    46) Interfacial adsorption in Potts model on the square lattice

    N.G. Fytas, A. Malakis, W. Selke, and L.N. Shchur

    Eur. Phys. J. B 88, 204 (2015)

    45) Self-assembly of DNA-functionalized colloids

    P.E. Theodorakis, N.G. Fytas, G, Kahl, and C. Dellago

    Condensed Matter Physics 18, 22801 (2015)

    44) Critical aspects of three-dimensional anisotropic spin-glass models

    T. Papakonstantinou, N.G. Fytas, A. Malakis, and I. Lelidis

    Eur. Phys. J. B 88, 94 (2015)

    43) Parallel multicanonical study of the three-dimensional Blume-Capel model

    J. Zierenberg, N.G. Fytas, and W. Janke

    Phys. Rev. E 91, 032126 (2015)

    42) Fragmentation of fractal random structures

    E.M. Elcie, M. Weigel, and N.G. Fytas

    Phys. Rev. Lett. 114, 115701 (2015)

    41) Random-field Ising model: Insight from zero-temperature simulations

    P.E. Theodorakis and N.G. Fytas

    Condensed Matter Physics 17, 43003 (2014)

    40) Critical Binder cumulant and universality: Fortuin-Kasteleyn clusters and order-parameter fluctuations

    A. Malakis, N.G. Fytas, and G. Gulpinar

    Phys. Rev. E 89, 042103 (2014)

    39) Phase behavior of two-component bottle-brush polymers with flexible backbones under poor solvent conditions

    N.G. Fytas and P.E. Theodorakis

    Materials Research Express 1, 015301 (2014)

    38) Wetting and interfacial adsorption in the Blume-Capel model on the square lattice

    N.G. Fytas and W. Selke

    Eur. Phys. J. B 86, 365 (2013)

    37) Universality in the three-dimensional random-field Ising model

    N.G. Fytas and V. Martin-Mayor

    Phys. Rev. Lett. 110, 227201 (2013)

    36) Molecular dynamics simulations of single-component bottle-brush polymers with flexible backbones under poor solvent conditions

    N.G. Fytas and P.E. Theodorakis

    J. Phys.: Condens. Matter 25, 285105 (2013)

    35) Critical aspects of the random-field Ising model

    N.G. Fytas, P.E. Theodorakis, I. Georgiou, and I. Lelidis

    Eur. Phys. J. B 86, 268 (2013)

    34) Fluctuations and criticality in the random-field Ising model

    P.E. Theodorakis, I. Georgiou, and N.G. Fytas

    Phys. Rev. E 87, 032119 (2013)

    33) Universality aspects of the 2d random-bond Ising and 3d Blume-Capel models

    N.G. Fytas and P.E. Theodorakis

    Eur. Phys. J. B 86, 30 (2013)

    32) Light scattering by a metallic nanoparticle coated with a nematic liquid crystal

    V. Yannopapas, N. Fytas, V. Kyrimi, E. Kallos, A.G. Vanakaras, and D.J. Photinos

    Phys. Stat. Sol. A 210, 335 (2013)

    31) Universality aspects of the trimodal random-field Ising model

    N.G. Fytas, P.E. Theodorakis, and I. Georgiou

    Eur. Phys. J. B 85, 349 (2012)

    30) Quantum Monte Carlo simulations revisited: The case of anisotropic Heisenberg chains

    P. Androvitsaneas, N.G. Fytas, E. Paspalakis, and A.F. Terzis

    Philosophical Magazine 92, 4649 (2012)

    29) Monte Carlo study of the triangular Blume-Capel model under bond randomness

    P.E. Theodorakis and N.G. Fytas

    Phys. Rev. E 86, 011140 (2012)

    28) Universality aspects of the d=3 random-bond Blume-Capel model

    A. Malakis, A.N. Berker, N.G. Fytas, and T. Papakonstantinou

    Phys. Rev. E 85, 061106 (2012)

    27) A study of the static properties of symmetric linear multiblock copolymers under poor solvent conditions

    P.E. Theodorakis and N.G. Fytas

    J. Chem. Phys. 136, 094902 (2012)

    26) Wang-Landau study of the 3D Ising model with bond disorder

    P.E. Theodorakis and N.G. Fytas

    Eur. Phys. J. B 81, 245 (2011)

    25) Analysis of the static properties of cluster formations in symmetric linear multiblock copolymers

    N.G. Fytas and P.E. Theodorakis

    J. Phys.: Condens. Matter 23, 235106 (2011)

    24) Phase behavior of symmetric linear multiblock copolymers

    P.E. Theodorakis and N.G. Fytas

    Europhys. Lett. 93, 43001 (2011)

    23) Wang-Landau study of the triangular Blume-Capel ferromagnet

    N.G. Fytas

    Eur. Phys. J. B 79, 21 (2011)

    22) Scaling and self-averaging in the three-dimensional random-field Ising model

    N.G. Fytas and A. Malakis

    Eur. Phys. J. B 79, 13 (2011)

    21) Microphase separation in linear multiblock copolymers under poor solvent conditions

    P.E. Theodorakis and N.G. Fytas

    Soft Matter 7, 1038 (2011)

    20) Universality in disordered systems: The case of the three-dimensional random-bond Ising model

    N.G. Fytas and P.E. Theodorakis

    Phys. Rev. E 82, 06201 (2010)

    19) Uncovering the secrets of the 2D random-bond Blume-Capel model

    A. Malakis, A.N. Berker, I.A. Hadjiagapiou, N.G. Fytas, and T. Papakonstantinou

    Physica A 389, 2930 (2010)

    18) Wang-Landau study of the 2d random-bond Blume-Capel model

    A. Malakis, A.N. Berker, I.A. Hadjiagapiou, and N.G. Fytas

    Physics Procedia 3, 1443 (2010)

    17) Multicritical points and crossover mediating the strong violation of universality: Wang-Landau determinations in the random-bond d=2 Blume-Capel model

    A. Malakis, A.N. Berker, I.A. Hadjiagapiou, N.G. Fytas, and T. Papakonstantinou

    Phys. Rev. E 81, 041113 (2010)

    16) Critical behavior of the pure and random-bond two-dimensional triangular Ising ferromagnet

    N.G. Fytas and A. Malakis

    Phys. Rev. E 81, 041109 (2010)

    15) Criticality in the randomness-induced second-order phase transition of the triangular Ising antiferromagnet with nearest- and next-nearest-neighbor interactions

    N.G. Fytas and A. Malakis

    Physica A 388, 4950 (2009)

    14) Strong violation of critical phenomena universality: Wang-Landau study of the two-dimensional Blume-Capel model under bond randomness

    A. Malakis, A.N Berker, I.A. Hadjiagapiou, and N.G. Fytas

    Phys. Rev. E 79, 011125 (2009)

    13) Quenched bond randomness in marginal and non-marginal 2D Ising spin models

    N.G. Fytas, A. Malakis, and I.A. Hadjiagapiou

    J. Stat. Mech.: Theory Exp. (2008) P11009

    12) Wang-Landau study of the random bond square Ising model with nearest- and next-nearest neighbor interactions

    N.G. Fytas, A. Malakis, and I. Georgiou

    J. Stat. Mech.: Theory Exp. (2008) L07001

    11) First-order transition features of the 3D bimodal random-field Ising model

    N.G. Fytas, A. Malakis, and K. Eftaxias

    J. Stat. Mech.: Theory Exp. (2008) P03015

    10) Phase diagram of the 3D bimodal random-field Ising model

    N.G. Fytas and A. Malakis

    Eur. Phys. J. B 61, 111 (2008)

    9) First-order transition features of the triangular Ising model with nearest- and next-nearest-neighbor antiferromagnetic interactions

    A. Malakis, N.G. Fytas, and P. Kalozoumis

    Physica A 383, 351 (2007)

    8) Thermal critical behavior and universality aspects of the three-dimensional random-field Ising model

    A. Malakis and N.G. Fytas

    Eur. Phys. J. B 51, 257 (2006)

    7) Universal features and tail analysis of the order-parameter distribution of the two-dimensional Ising model: An entropic sampling Monte Carlo study

    A. Malakis and N.G. Fytas

    Phys. Rev. E 73, 056114 (2006)

    6) A new comprehensive study of the 3D random-field Ising model via sampling the density of states in dominant energy subspaces

    N.G. Fytas and A. Malakis

    Eur. Phys. J. B 50, 39 (2006)

    5) The CrMES scheme as an alternative to importance sampling: The tail regime of the order-parameter distribution

    A. Malakis and N.G. Fytas

    Physica A 365, 197 (2006)

    4) Lack of self-averaging of the specific heat in the three-dimensional random-field Ising model

    A. Malakis and N.G. Fytas

    Phys. Rev. Ε 73, 016109 (2006)

    3) Entropic sampling via Wang-Landau random walks in dominant energy subspaces

    A. Malakis, S.S. Martinos, I.A. Hadjiagapiou, N.G. Fytas, and P. Kalozoumis

    Phys. Rev. E 72, 066120 (2005)

    2) Magnetic-field dependence of transport in normal and Andreev billiards: A classical interpretation of the averaged quantum behavior

    N.G. Fytas, F.K. Diakonos, P. Schmelcher, M. Scheid, A. Lassl, K. Richter, and G. Fagas

    Phys. Rev. B 72, 085336 (2005)

    1) Estimation of critical behavior from the density of states in classical statistical models

    A. Malakis, A. Peratzakis, and N.G. Fytas

    Phys. Rev. E 70, 066128 (2004)