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Position |
Associate Professor |
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Research Field |
Natural Science / Magnetism, superconductivity and strongly correlated systems |
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Homepage URL |
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External Link |
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Graduating School 【 display / non-display 】
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The University of Tokyo Faculty of Science Graduated
2003.4 - 2007.3
Graduate School 【 display / non-display 】
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The University of Tokyo Graduate School, Division of Science Doctor's Course Completed
2009.4 - 2012.3
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The University of Tokyo Graduate School, Division of Science Master's Course Completed
2007.4 - 2009.3
Studying abroad experiences 【 display / non-display 】
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2018.9-2020.3
Max Planck Institute for the Physics of Complex Systems
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2015.9-2018.9
University of Geneva
Campus Career 【 display / non-display 】
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KONAN UNIVERSITY Faculty of Science and Engineering Faculty of Science and Engineering Department of Physics Associate Professor
2020.4
External Career 【 display / non-display 】
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Max Planck Institute for the Physics of Complex Systems
2018.9 - 2020.3
Country：Germany
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University of Geneva Department of Quantum Matter Physics
2015.9 - 2018.9
Country：Switzerland
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The University of Tokyo School of Science, Department of Physics
2015.5 - 2015.8
Country：Japan
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National Institute for Materials Science
2013.4 - 2015.4
Country：Japan
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The University of Tokyo School of Engineering, Department of Applied Physics
2012.8 - 2013.3
Country：Japan
Papers 【 display / non-display 】
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Spin, Charge, and η-Spin Separation in One-Dimensional Photodoped Mott Insulators Reviewed
Yuta Murakami, Shintaro Takayoshi, Tatsuya Kaneko, Andreas M. Läuchli, Philipp Werner
Physical Review Letters 130 ( 10 ) 106501 2023.3
Publisher：American Physical Society (APS)
DOI： 10.1103/PhysRevLett.130.106501
Other Link： https://link.aps.org/article/10.1103/PhysRevLett.130.106501
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Mott memristors based on field-induced carrier avalanche multiplication Reviewed
Francesco Peronaci, Sara Ameli, Shintaro Takayoshi, Alexandra S. Landsman, Takashi Oka
Physical Review B 107 ( 7 ) 075154 2023.2
Publisher：American Physical Society (APS)
DOI： 10.1103/PhysRevB.107.075154
Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.107.075154/fulltext
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Dynamical conductivity of disordered quantum chains Reviewed
Shintaro Takayoshi, Thierry Giamarchi
The European Physical Journal D 76 ( 11 ) 213 2022.11
Authorship：Lead author Publisher：Springer Science and Business Media LLC
Abstract
We study the transport properties of a one-dimensional quantum system with disorder. We numerically compute the frequency dependence of the conductivity of a fermionic chain with nearest-neighbor interaction and a random chemical potential by using the Chebyshev matrix product state (CheMPS) method. As a benchmark, we investigate the noninteracting case first. Comparison with exact diagonalization and analytical solutions demonstrates that the results of CheMPS are reliable over a wide range of frequencies. We then calculate the dynamical conductivity spectra of the interacting system for various values of the interaction and disorder strengths. In the high-frequency regime, the conductivity decays as a power law, with an interaction-dependent exponent. This behavior is qualitatively consistent with the bosonized field theory predictions, although the numerical evaluation of the exponent shows deviations from the analytically expected values. We also compute the characteristic pinning frequency at which a peak in the conductivity appears. We confirm that it is directly related to the inverse of the localization length, even in the interacting case. We demonstrate that the localization length follows a power law of the disorder strength with an exponent dependent on the interaction, and find good quantitative agreement with the field theory predictions. In the low-frequency regime, we find a behavior consistent with the one of the noninteracting system $$\omega ^{2}(\ln \omega )^{2}$$ independently of the interaction. We discuss the consequences of our finding for experiments in cold atomic gases.
Graphical abstractDOI： 10.1140/epjd/s10053-022-00524-1
Other Link： https://link.springer.com/article/10.1140/epjd/s10053-022-00524-1/fulltext.html
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Second-order magnetic responses in quantum magnets: Magnetization under ac magnetic fields
Tatsuya Kaneko, Yuta Murakami, Shintaro Takayoshi, Andrew J. Millis
Physical Review B 105 ( 19 ) 2022.5
Publisher：American Physical Society (APS)
DOI： 10.1103/physrevb.105.195126
Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.105.195126/fulltext
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Exploring nonequilibrium phases of photo-doped Mott insulators with generalized Gibbs ensembles
Yuta Murakami, Shintaro Takayoshi, Tatsuya Kaneko, Zhiyuan Sun, Denis Golež, Andrew J. Millis, Philipp Werner
Communications Physics 5 ( 1 ) 2022.1
Many experiments show that strong excitations of correlated quantum materials can cause non-thermal phases without equilibrium analogues. Understanding the origin and properties of these nonequilibrium states has been challenging due to the limitations of theoretical methods for nonequilibrium strongly correlated systems. In this work, we introduce a generalized Gibbs ensemble description that enables a systematic analysis of the long-time behavior of photo-doped states in Mott insulators based on equilibrium methods. We demonstrate the power of the method by mapping out the nonequilibrium phase diagram of the one-dimensional extended Hubbard model, which features η-pairing and charge density wave phases in a wide photo-doping range. We furthermore clarify that the peculiar kinematics of photo-doped carriers, and the interaction between them, play an essential role in the formation of these non-thermal phases. Our results establish a new path for the systematic analysis of nonequilibrium strongly correlated systems.
Review Papers (Misc) 【 display / non-display 】
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Field theoretical approach to the entanglement spectrum of AKLT states
Tanaka Akihiro, Takayoshi Shintaro
Meeting Abstracts of the Physical Society of Japan 72 ( 0 ) 2419 - 2419 2017
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Theoretical Study towards Ultrafast Spintronics
Sato Masahiro, Takayoshi Shintaro, Oka Takashi
Butsuri 72 ( 11 ) 783 - 792 2017
Publisher：The Physical Society of Japan
<p>In this article, we explain our theoretical proposals, ultrafast ways of controlling magnetic properties of solid (magnetization, spin chirality, spin currents, etc.) by laser. We first review the Floquet theorem, which is useful for the prediction of novel laser-induced phenomena, then we turn to our recent results. We cover the following topics: laser-induced magnetization growing process, laser-driven spin chirality and spin current in multiferroics, and topological spin liquid state realized by laser in the honeycomb Kitaev model.</p>
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3d AKLT like SPT states in terms as a dual to the O(6) nonlinear sigma model
Tanaka Akihiro, Takayoshi Shintaro
Meeting Abstracts of the Physical Society of Japan 71 ( 0 ) 2755 - 2755 2016
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Strange correlator in symmetry protected topological phases of quantum spin systems
Takayoshi Shintaro, Tanaka Akihiro
Meeting Abstracts of the Physical Society of Japan 71 ( 0 ) 2756 - 2756 2016
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16aCQ-12 Pair Tomonaga-Luttinger liquid phase in a Bose-Hubbard model with flat bands
Katsura Hosho, Takayoshi Shintaro, Watanabe Noriaki, Aoki Hideo
Meeting Abstracts of the Physical Society of Japan 70 ( 0 ) 2536 - 2536 2015