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feram

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A fast molecular dynamics simulator for ferroelectrics. This simulator can execute molecular dynamics calculations quickly by dealing with dipole interaction efficiently. It can simulate the physical property of microscopic ferroelectric thin film of tens of nanometers, which is important in FeRAM(Ferroelectric Random Access Memory), controlling the shapes and effects of inactivated layers.

Information
Last Update:2021/03/05

Official site

http://loto.sourceforge.net/feram/index.en.html

License

GPL v3
Availability Can be installed on PC Linux, Mac OS X, Hitachi SR16000, Fujitsu FX10, etc. Can be compiled on various Fortran compilers including GNU Fortran (gfortran), Intel Fortran (ifort), and XL Fortran (xlf90_r)
Core Developers Takeshi Nishimatsu（Institute for Materials Research, Tohoku University）
Target substance/model Ferroelectrics
Physical quantities that can be computed Physical characteristics of ferroelectrics, permittivity, phase transition, piezoelectric property, pyroelectricity, and electrocaloric effect
Methodology Molecular dynamics method based on first-principles Hamiltonian
Parallelization Parallel computing by MPI and OpenMP is supported. High-speed operating performance has been checked on SR16000.
Related keywords
Document ・Jaita Paul, Takeshi Nishimatsu, Yoshiyuki Kawazoe and Umesh V. Waghmare: "Ferroelectric phase transitions in ultrathin films of BaTiO3", Phys. Rev. Lett. 99, 077601 (2007). ・Takeshi Nishimatsu, Umesh V. Waghmare, Yoshiyuki Kawazoe and David Vanderbilt: "Fast molecular-dynamics simulation for ferroelectric thin-film capacitors using a first-principles effective Hamiltonian", Phys. Rev. B 78, 104104 (2008). ・Takeshi Nishimatsu, Kenta Aoyagi, Takanori Kiguchi, Toyohiko J. Konno, Yoshiyuki Kawazoe, Hiroshi Funakubo, Anil Kumar and Umesh V. Waghmare: "Molecular Dynamics Simulation of 90° Ferroelectric Domains in PbTiO3", J. Phys. Soc. Jpn. 81, 124702 (2012).
Other Very fast calculation of dipole–dipole mutual interactions using fast Fourier transform (FFT). The software can calculate bulk materials as well as perform simulations of ferroelectric thin film condensers. Compilation and development under different environments is made easy thanks to GNU Autotools. Developer's comments on feram (Japanese) Dipolar moments and ferroelectrics (Japanese)
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