研究成果

 

プレプリント

  1. 1.Maximilian Trescher, Emil J. Bergholtz, Masafumi Udagawa and Johannes Knolle, “Charge density wave instabilities of type-II Weyl semimetals in a strong magnetic field”, arXiv: 1706.02306


  1. 2.Tomonari Mizoguchi, Ludovic D. C. Jaubert and Masafumi Udagawa, “Clustering of Topological Charges in Kagome Classical Spin Liquid”, arXiv: 1702.03794


査読付論文


  1. 3.Tomohiro Yoshida and Masafumi Udagawa, “Generic Weyl phase in the vortex state of quasi-two-dimensional chiral superconductors", Physical Review B 94, 060507(R) (2016).


  1. 4.M. Udagawa and E.J. Bergholtz, “Field-Selective Anomaly and Chiral Mode Reversal in Type-II Weyl Materials", Physical Review Letters 117, 086401 (2016).


  1. 5.Masafumi Udagawa, Ludovic D. C. Jaubert, Claudio Castelnovo, Roderich Moessner, “When opposites repel: from metastability to extended chiral spin textures in spin ice with short-range topological-defect interactions", Physical Review B 94, 104416 (2016).


  1. 6.Y. Tokiwa, T. Yamashita, M. Udagawa, S. Kittaka, T. Sakakibara, D. Terazawa, Y. Shimoyama, T. Terashima, Y. Yasui, T. Shibauchi, Y. Matsuda, “Thermal conductivity of quantum magnetic monopoles in the frustrated pyrochlore Yb2Ti2O7", Nature Communications 7, 10807 (2016).


  1. 7.Joji Nasu, Masafumi Udagawa, Yukitoshi Motome, “Thermal fractionalization of quantum spins in a Kitaev model: T-linear specic heat and coherent transport of Majorana fermions", Physical Review B 92, 115122 (2015).


  1. 8.E.J. Bergholtz, Zhao Liu, M. Trescher, R. Moessner, M. Udagawa, “Topology and Interactions in a Frustrated Slab:

Tuning from Weyl Semimetals to C > 1 Fractional Chern Insulators", Physical Review Letters 114, 016806 (2015).


  1. 9.R. Ozawa, M. Udagawa, Y. Akagi and Y. Motome, “Reconstruction of Chiral Edge States in a Magnetic Chern Insulator”, Journal of the Physical Society of Japan, 83, 073706 (2014).


  1. 10.Joji Nasu, Masafumi Udagawa, Yukitoshi Motome, “Vaporization of quantum spin liquids", Physical Review Letters 113, 197205 (2014).


  1. 11.J. Nasu, T. Kaji, K. Matsuura, M. Udagawa and Y. Motome, “Finite-Temperature Phase Transition to a Quantum Spin Liquid in a Three-Dimensional Kitaev Model on a Hyperhoneycomb Lattice”, Physical Review B 89, 115125 (2014).


  1. 12.Y. Akagi, M. Udagawa and Y. Motome ``Effect of Quantum Spin Fluctuation on Scalar Chiral Ordering in the Kondo Lattice Model on a Triangular Lattice", Journal of the Physical Society of Japan, 82, 123709 (2013).


  1. 13. H. Ishizuka, M. Udagawa and Y. Motome, ``Polynomial Expansion Monte Carlo Study of Frustrated Itinerant Electron Systems: Application to a Spin-ice type Kondo Lattice Model on a Pyrochlore Lattice", Computer Physics Communications, 184, 2684 (2013).


  1. 14.M. Udagawa and R. Moessner, ``Anomalous Hall effect from frustration-tuned scalar chirality distribution in Pr2Ir2O7", Physical Review Letters, 111, 036602 (2013).


  1. 15.H. Ishizuka, M. Udagawa and Y. Motome, ``Magnetic Order and Charge Disproportionation in a Spin-Ice Type Kondo Lattice Model: Large Scale Monte Carlo Study", Journal of the Physical Society of Japan, 81, 113706/1-4 (2012).


  1. 16.R. Ozawa, M. Udagawa, Y. Akagi and Y. Motome, “Reconstruction of Chiral Edge States in a Magnetic Chern Insulator”, Journal of the Physical Society of Japan, 83, 073706 (2014).


  1. 17.S. Hayami, M. Udagawa and Y. Motome, ``Partial Disorder and Metal-Insulator Transition in the Periodic Anderson Model on a Triangular Lattice", Journal of the Physical Society of Japan, 81, 103707/1-4 (2012).


  1. 18.Y. Akagi, M. Udagawa and Y. Motome, “Hidden Multiple-spin Interactions as an Origin of Spin Scalar Chiral Order in Frustrated Kondo Lattice Models”, Physical Review Letters, 108, 096401/1-4 (2012).


  1. 19.M. Udagawa, H. Ishizuka and Y. Motome, “Non-Kondo mechanism for resistivity minimum in spin ice conduction systems”, Physical Review Letters, 108, 066406/1-4 (2012).


  1. 20.S. Hayami, M. Udagawa and Y. Motome, “Partial disorder in the periodic Anderson model on a triangular lattice”, Journal of the Physical Society of Japan, 80, 073704/1-4 (2011).


  1. 21.H. Uchigaito, M. Udagawa and Y. Motome, “Mean-field study of charge, spin, and orbital orderings in triangular-lattice compounds ANiO2 (A=Na, Li, Ag)”, Journal of the Physical Society of Japan, 80, 044705/1-10 (2011).


  1. 22.H. Ishizuka, M. Udagawa and Y. Motome, “Metal-insulator transition caused by the coupling to localized charge-frustrated systems under ice-rule local constraint”, Physical Review B, 83, 125101/1-15 (2011).


  1. 23.M. Udagawa and Y. Yanase, “Interplay of spin-orbit interaction and electron correlation on the Van Vleck susceptibility in transition metal compounds”, Journal of the Physical Society of Japan, 79, 123601/1-4 (2010).


  1. 24.Y. Motome, K. Nakamikawa, Y. Yamaji and M. Udagawa,“Partial Kondo screening in frustrated Kondo lattice systems ”, Physical Review Letters, 105, 036403-6 (2010).


  1. 25.M. Udagawa, H. Ishizuka and Y. Motome, “Quantum melting of charge ice and non- Fermi-liquid behavior: An exact solution for the extended Falicov-Kimball model in the ice-rule limit ”, Physical Review Letters, 104, 226405-8 (2010).


  1. 26.M. Udagawa and Y. Motome, “Chirality-driven mass enhancement in the kagome Hubbard model ”, Physical Review Letters, 104, 106409-12 (2010).


  1. 27. T. Ogitsu, F. Gygi, J. Reed, M. Udagawa, Y. Motome, E. Schwegler, G. Galli,“Geometrical frustration in an elemental solid: An Ising model to explain the defect structure of beta- rhombohedral boron ”, Physical Review B, 81, 020102-5 (2010).


  1. 28. T. Koretsune, M. Udagawa and M. Ogata, “Thermodynamic properties of the Heisenberg model on a triangular lattice with two exchange couplings: Application to two-dimensional solid 3He adsorbed on graphite ”, Physical Review B, 80, 075408-12 (2009).


  1. 29. D. Matsubayashi, M. Udagawa and M. Ogata, “Numerical study of current-induced domain-wall dynamics: Crossover from spin transfer to momentum transfer ”, Jounral of the Physical Society of Japan, 78, 033703-6 (2009).


  1. 30. M. Udagawa and Y. Motome, “Charge ordering and coexistence of charge fluctuations in quasi-two-dimensional organic conductors theta-(BEDT-TTF)2X”, Physical Review Letters, 98, 206405-8 (2007).


  1. 31. M. Udagawa, Y. Yanase and M. Ogata, “Formation of non-unitary state near the upper- critical field of Sr2RuO4”, Jounral of the Physical Society of Japan, 74, 2905-8 (2005).


  1. 32. M. Udagawa, Y. Yanase and M. Ogata, “Effects of Fermi surface and superconducting gap structure in field-rotational experiments: A possible explanation for the cusplike singularity in YNi2B2C ”, Physical Review B, 71, 024511/1-11 (2005).


  1. 33. M. Udagawa, Y. Yanase and M. Ogata “Quasiparticle density of states in layered super- conductors under a magnetic field parallel to the ab-plane: Determination of gap structure of Sr2RuO4”, Physical Review B, 70, 184515/1-8 (2004).


  1. 34. M. Udagawa, M. Ogata and Z. Hiroi, “Exact result of ground-state entropy for Ising pyrochlore magnets under a magnetic field along [111] axis”, Jounral of the Physical Society of Japan, 71, 2365-2368 (2002).



プロシーディングス

  1. 35. M. Udagawa and Y. Motome, “Entanglement Spectrum in Cluster Dynamical Mean Field Theory", J. Stat. Mech. (2015) P01016.


  1. 36. M. Udagawa and E. J. Bergholtz, “Correlations and Entanglement in Flat Band Models with Variable Chern Numbers", J. Stat. Mech. (2014) P10012.


  1. 37. Y. Akagi, M. Udagawa and Y. Motome, ÄLinear Spin Wave Analysis for General Magnetic Orders in the Kondo Lattice Model", Journal of the Physical Society of Japan, Conference Proceedings, 3, 014017 (2014).


  1. 38. H. Ishizuka, M. Udagawa and Y. Motome, “Monte Carlo Study of an Effective Ising Model for the Spin-ice type Kondo Lattice Model", Journal of the Physical Society of Japan, Conference Proceedings, 3, 014013 (2014).


  1. 39. M. Udagawa, H. Ishizuka and Y. Motome, “Invariant Energy Levels and Flat Band Engineering in a Kondo Lattice Model on Geometrically Frustrated Lattices" in the Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013).


  1. 40. H. Ishizuka, M. Udagawa and Y. Motome, “Application of polynomial-expansion Monte Carlo method to a spin-ice Kondo lattice model", Journal of Physics: Conference series, Institute of Physics, 400, 032027 (2012).


  1. 41. S. Hayami, M. Udagawa and Y. Motome, “Carrier doping to a partially disordered state in the periodic Anderson model on a triangular lattice", Journal of Physics: Conference series, Institute of Physics, 400, 032018 (2012).


  1. 42. Y. Motome, K. Nakamikawa, Y. Yamaji and M. Udagawa, “Variational Monte Carlo study of the Kondo necklace model with geometrical frustration", Journal of the Physical Society of Japan, 80, Suppl. A, 2011, SA133/1-3.


  1. 43. M. Udagawa and Y. Yanase, “Correlation effect on the Van Vleck susceptibility in Sr2RuO4", Physica C, ScienceDirect, 470-471, S697-S698 (2010).


  1. 44. M. Udagawa and Y. Motome, “Chirality-spin separation in the Hubbard model on the kagome lattice", Journal of Physics: Conference series, Institute of Physics, 200, 012214-17 (2010).


  1. 45. Y. Motome, Y. Yamaji and M. Udagawa, “Instability to partial Kondo-singlet state in the Kondo necklace model on frustrated lattices", Journal of Physics: Conference series, nstitute of Physics, 145, 012068-71 (2010).


  1. 46. M. Udagawa and Y. Motome, “Cluster dynamical mean field study of the Hubbard model on a 3D frustrated hyperkagome lattice", Journal of Physics: Conference series, Institute of Physics, 145, 012013-16 (2009).


  1. 47. M. Udagawa, Y. Yanase and M. Ogata, “Theory of extracting superconducting gap structure from eld-angle rotational experiments", Physica B, ScienceDirect, 359-361, 536-537 (2005).