Results 81 to 90 of about 56,836 (316)

Cyclic exchange, isolated states and spinon deconfinement in an XXZ Heisenberg model on the checkerboard lattice

, 2004
The antiferromagnetic Ising model on a checkerboard lattice has an ice-like ground state manifold with extensive degeneracy. and, to leading order in J_xy, deconfined spinon excitations.
A. Sütő, Grégoire Misguich, Karlo Penc, Nic Shannon, P. Fazekas, R. Baxter   +5 more
core   +1 more source

On generalized cluster algorithms for frustrated spin models [PDF]

, 1993
Standard Monte Carlo cluster algorithms have proven to be very effective for many different spin models, however they fail for frustrated spin systems.
A.D. Sokal, C.F. Baillie, D. Chowdhury, D. Kandel, D. Kandel, D. Kandel, D. Stauffer, F. Niedermayer, G. Toulouse, G.H. Wannier, J. S. Wang, J. Stephenson, J. Stephenson, J. Villain, K. Binder, L. Han, M. D'Onorio de Meo, M. Lubin, M. Mezard, N. Metropolis, P. D. Coddington, R. Brower, R.H. Swendsen, R.H. Swendsen, R.H. Swendsen, S. Wolfram, U. Wolff   +26 more
core   +2 more sources

Free energy and metastable states in the square-lattice $J_1$-$J_2$ Ising model

SciPost Physics
Free energy as a function of polarization is calculated for the square-lattice $J_1$-$J_2$ Ising model for $J_2 < |J_1|/2$ using the random local field approximation (RLFA) and Monte Carlo (MC) simulations. Within RLFA, it reveals a metastable state with
Veniamin A. Abalmasov
doaj   +1 more source

Quasi-Two-Dimensional Anomalous Hall Mott Insulator of Topologically Engineered J_{eff}=1/2 Electrons

Physical Review X, 2022
We investigate an experimental toy-model system of a pseudospin-half square-lattice Hubbard Hamiltonian in [(SrIrO_{3})_{1}/(CaTiO_{3})_{1}] to include both nontrivial complex hopping and moderate electron correlation. While the former induces electronic
Junyi Yang, Hidemaro Suwa, Derek Meyers, Han Zhang, Lukas Horak, Zhaosheng Wang, Gilberto Fabbris, Yongseong Choi, Jenia Karapetrova, Jong-Woo Kim, Daniel Haskel, Philip J. Ryan, M. P. M. Dean, Lin Hao, Jian Liu   +14 more
doaj   +1 more source

Projective cluster-additive transformation for quantum lattice models

SciPost Physics, 2023
We construct a projection-based cluster-additive transformation that block-diagonalizes wide classes of lattice Hamiltonians $\mathcal{H}=\mathcal{H}_0 +V$.
Max Hörmann, Kai P. Schmidt
doaj   +1 more source

Intermediate Resistive State in Wafer‐Scale Vertical MoS2 Memristors Through Lateral Silver Filament Growth for Artificial Synapse Applications

Advanced Functional Materials, EarlyView.
In MOCVD MoS2 memristors, a current compliance‐regulated Ag filament mechanism is revealed. The filament ruptures spontaneously during volatile switching, while subsequent growth proceeds vertically through the MoS2 layers and then laterally along the van der Waals gaps during nonvolatile switching.
Yuan Fa, Milan Buttberg, Ke Ran, Rana Walied Ahmad, Dennis Braun, Lukas Völkel, Jimin Lee, Sofía Cruces, Bart Macco, Bárbara Canto, Holger Lerch, Thorsten Wahlbrink, Holger Kalisch, Michael Heuken, Andrei Vescan, Joachim Mayer, Zhenxing Wang, Ilia Valov, Stephan Menzel, Max C. Lemme   +19 more
wiley   +1 more source

Two phase transitions in the fully frustrated $XY$ model

, 1995
The fully frustrated $XY$ model on a square lattice is studied by means of Monte Carlo simulations. A Kosterlitz-Thouless transition is found at $T_{\rm KT} \approx 0.446$, followed by an ordinary Ising transition at a slightly higher temperature, $T_c ...
A. Vallat, D. H. Lee, E. Granato, E. Granato, G. Ramirez-Santiago, H. Weber, J. Lee, J. M. Thijssen, J. M. Thijssen, J. Villain, J.-R. Lee, K. Binder, P. Minnhagen, P. Olsson, P. Olsson, P. Olsson, P. Olsson, Peter Olsson, S. Lee, S. Miyashita, S. Teitel, T. Ohta, Y. M. M. Knops   +22 more
core   +1 more source

Ordering in Two-Dimensional Ising Models with Competing Interactions [PDF]

, 2005
We study the 2D Ising model on a square lattice with additional non-equal diagonal next-nearest neighbor interactions. The cases of classical and quantum (transverse) models are considered.
C. Gros, Chitov G. Y., Chitov G. Y., Fradkin E. H., G. Y. Chitov, Gaulin B. D., Grenier S., Gros C., Houtappel R. M. F., Krinsky S., Kugel K. I., Lemmens P., Moessner R., Mostovoy M. V., Mostovoy M. V., Mostovoy M. V., Ohwada K., Ravy S., Sa D., Stephenson J., Vaks V. G., van Smaalen S.   +21 more
core   +2 more sources

Emergent 1/3 magnetization plateaus in pyroxene CoGeO_{3}

Physical Review Research, 2021
Despite the absence of an apparent triangular pattern in the crystal structure, we observe unusually well-pronounced 1/3 magnetization plateaus in the quasi-one-dimensional Ising spin chain compound CoGeO_{3} which belongs to the class of pyroxene ...
H. Guo, L. Zhao, M. Baenitz, X. Fabrèges, A. Gukasov, A. Melendez Sans, D. I. Khomskii, L. H. Tjeng, A. C. Komarek   +8 more
doaj   +1 more source

Real‐Time 3D Ultrasound Imaging with an Ultra‐Sparse, Low Power Architecture

Advanced Healthcare Materials, EarlyView.
This article presents a novel, ultra‐sparse ultrasound architecture that paves the way for wearable real‐time 3D imaging. By integrating a unique convolutional array with chirped data acquisition, the system achieves high‐resolution volumetric scans at a fraction of the power and hardware complexity.
Colin Marcus, Md Osman Goni Nayeem, Aastha Shah, Jason Hou, Shrihari Viswanath, Maya Eusebio, David Sadat, Anantha P. Chandrakasan, Tolga Ozmen, Canan Dagdeviren   +9 more
wiley   +1 more source