Zobrazeno 1 - 10
of 94
pro vyhledávání: '"Nonomura, Yoshihiko"'
We study the field--temperature phase diagram of the two-dimensional dipolar Ising ferromagnet on a kagome lattice with a specific ratio between the exchange and dipolar constants, $\delta = 1$. Using the stochastic cutoff (SCO) $O(N)$ Monte Carlo me
Externí odkaz:
http://arxiv.org/abs/2202.12531
Publikováno v:
Phys. Rev. B 103, 214404 (2021)
We study phase transitions in the two-dimensional Heisenberg model with the Dzyaloshinskii-Moriya interaction, the Ising anisotropy ($\eta$), and the dipolar interaction under zero and finite magnetic fields ($H$). For three typical strengths (zero,
Externí odkaz:
http://arxiv.org/abs/2011.05496
Autor:
Nonomura, Yoshihiko, Tomita, Yusuke
Publikováno v:
Phys. Rev. E 102, 052118 (2020)
Recently, the present authors proposed the nonequilibrium-to-equilibrium scaling (NE-ES) scheme for critical Monte Carlo relaxation process, which scales relaxation data in the whole simulation-time regions regardless of functional forms, namely both
Externí odkaz:
http://arxiv.org/abs/2007.14356
Autor:
Nonomura, Yoshihiko, Tomita, Yusuke
Publikováno v:
Phys. Rev. E 101, 032105 (2020)
Although the nonequilibrium relaxation (NER) method has been widely used in Monte Carlo studies on phase transitions in classical spin systems, such studies have been quite limited in quantum phase transitions. The reason is that relaxation process b
Externí odkaz:
http://arxiv.org/abs/1907.06169
Publikováno v:
Phys. Rev. B 100, 094407 (2019)
We investigate phase transitions in the two-dimensional dipolar Heisenberg model with uniaxial anisotropy with a specific ratio between the exchange and dipolar constants, $\delta=1$. We obtain the $\eta$--$T$ (anisotropy vs. temperature) phase diagr
Externí odkaz:
http://arxiv.org/abs/1906.02954
Autor:
Tomita, Yusuke, Nonomura, Yoshihiko
Publikováno v:
Phys. Rev. E 98, 052110 (2018)
We investigate nonequilibrium relaxations of Ising models at the critical point by using a cluster update. While preceding studies imply that nonequilibrium cluster-flip dynamics at the critical point are universally described by the stretched-expone
Externí odkaz:
http://arxiv.org/abs/1808.07761
Publikováno v:
Phys. Rev. E 98, 062126 (2018)
We study field-induced phase transitions in the two-dimensional dipolar Ising ferromagnet with a specific ratio between the exchange and dipolar constants, $\delta=1$, which exhibits a stripe-ordered phase with the width of one lattice unit at low te
Externí odkaz:
http://arxiv.org/abs/1808.06061
Publikováno v:
Phys. Rev. B 97, 205125 (2018)
We explore the possibility of a Berezinskii-Kosterlitz-Thouless-like critical phase for the charge degrees of freedom in the intermediate-temperature regime between the charge-ordered and disordered phases in two-dimensional systems with competing sh
Externí odkaz:
http://arxiv.org/abs/1802.08538
Autor:
Nonomura, Yoshihiko, Tomita, Yusuke
The Binder ratios exhibit discrepancy from the Gaussian behavior of the magnetic cumulants, and their size independence at the critical point has been widely utilized in numerical studies of critical phenomena. In the present article we reformulate t
Externí odkaz:
http://arxiv.org/abs/1801.10315
Autor:
Nonomura, Yoshihiko, Tomita, Yusuke
Publikováno v:
Phys. Rev. E 92, 062121 (2015)
Recently we showed that the critical nonequilibrium relaxation in the Swendsen-Wang algorithm is widely described by the stretched-exponential relaxation of physical quantities in the Ising or Heisenberg models. Here we make a similar analysis in the
Externí odkaz:
http://arxiv.org/abs/1509.08352