Zobrazeno 1 - 10
of 156
pro vyhledávání: '"Udagawa, Masafumi"'
Pinch point is a spectral discontinuity found in the neutron diffraction image of spin ice. Similar spectral singularity is commonly observed in a broad range of systems that have a close connection with flat bands. We focus on the electron flat band
Externí odkaz:
http://arxiv.org/abs/2404.13533
Autor:
Albarracín, F. A. Gómez, Rosales, H. D., Udagawa, Masafumi, Pujol, P., Jaubert, Ludovic D. C.
Publikováno v:
Phys. Rev. B 109, 064426 (2024)
The physics of skyrmions, and in particular the issue of how to isolate and manipulate them individually, is a subject of major importance nowadays in the community of magnetism. In this article we present an in-depth extension of a study on this iss
Externí odkaz:
http://arxiv.org/abs/2311.08468
Autor:
Yamada, Masahiko G., Sanno, Takumi, Takahashi, Masahiro O., Akagi, Yutaka, Suwa, Hidemaro, Fujimoto, Satoshi, Udagawa, Masafumi
The density matrix renormalization group (DMRG) is a celebrated tensor network algorithm, which computes the ground states of one-dimensional quantum many-body systems very efficiently. Here we propose an improved formulation of continuous tensor net
Externí odkaz:
http://arxiv.org/abs/2212.13267
Autor:
Takahashi, Masahiro O., Yamada, Masahiko G., Udagawa, Masafumi, Mizushima, Takeshi, Fujimoto, Satoshi
In the Kitaev chiral spin liquid, Ising anyons are realized as $Z_2$ fluxes binding Majorana zero modes, which, however, are thermal excitations with finite decay rates. On the other hand, a lattice vacancy traps a $Z_2$ flux even in the ground state
Externí odkaz:
http://arxiv.org/abs/2211.13884
Publikováno v:
Phys. Rev. B 106, L140404 (2022)
We study the kagome antiferromagnet for quantum spin-1/2 with first J1, second J2 and third J3 neighbour exchanges, along the J2 = J3 = J line. We use Schwinger-boson mean-field theory for the precise determination of the phase diagram, and two diffe
Externí odkaz:
http://arxiv.org/abs/2206.00547
Spin ice presents a typical example of classical spin liquid, where conserved magnetic fluxes emerge from microscopic spin degrees of freedom. In this letter, we investigate the effect of perturbation by magnetic charge disorder in two-dimensional sp
Externí odkaz:
http://arxiv.org/abs/2204.07857
Publikováno v:
Nat. Commun. 13, 4604 (2022)
It has become common knowledge that phonons can generate thermal Hall effect in a wide variety of materials, although the underlying mechanism is still controversial. We study longitudinal $\kappa_{xx}$ and transverse $\kappa_{xy}$ thermal conductivi
Externí odkaz:
http://arxiv.org/abs/2202.12149
Publikováno v:
J. Phys. Soc. Jpn., 90, 073704 (2021)
In this letter, we address magnetization switching by oxygen adsorption in porous metal-organic framework systems. To this end, we construct a simple localized spin model combined with a Langmuir-type formula for oxygen adsorption and study its finit
Externí odkaz:
http://arxiv.org/abs/2104.04166
Publikováno v:
Phys. Rev. Lett. 126, 127201 (2021)
In this letter, we propose a local detection scheme for the Majorana zero mode (MZM) carried by a vison in Kitaev's chiral spin liquid (CSL) using scanning tunneling microscopy (STM). The STM introduces a single Majorana into the system through hole/
Externí odkaz:
http://arxiv.org/abs/2008.07399