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RSPACE

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RSPACE is a first-principles code package based on a real-space finite-difference pseudo-potential method. It computes electronic states with high-speed and high precision in aperiodic systems of surfaces, solid interfaces, clusters, nanostructures, and so forth. It provides large-scale computing for semiconductor devices of nanostructure surface and interface reactions, calculation of transport properties in semi-infinite boundary conditions, and a massively parallel computing using the space partitioning method.

Information
Last Update:2024/12/10

Official site

https://www.lab.kobe-u.ac.jp/eng-ep4b/rspace.html

License

Apache-2.0

Availability

Tested with SGI Altix, NEC SX9, Fujitsu FX10, T2K-Tsukuba, K, and Xeon with Intel compiler
Core Developers

Tomoya Ono (Graduate School of Engineering, Osaka University),
Marcus Heide (Graduate School of Engineering, Osaka University),
Shigeru Tsukamoto (Forschungszentrum Jülich),
Yoshiyuki Egami (Graduate School of Engineering, Hokkaido University)
Target substance/model

Molecules, clusters, semiconductor surfaces, and interfaces
Physical quantities that can be computed

Electron state, transport characteristics, and conductivity characteristics
Methodology

Real space finite-difference method; overbridging boundary-matching method
Related keywords
Document

Kikuji Hirose, Tomoya Ono, Yoshitaka Fujimoto, and Shigeru Tsukamoto, First-Principles Calculations in Real-Space Formalism —Electronic Configurations and Transport Properties of Nanostructures—, (Imperial College Press, London, 2005)
Other

RSPACE performs first-principles calculations based on the density functional theory using the real-space finite-difference method suited for massively parallel computers. The software uses PAW for pseudopotentials, a method that is the best in terms of both computational cost and precision, enabling high-precision computation of models containing transition metals as well. The electron state can be calculated, in addition to the electric conductivity characteristics of nanostructures using the semi-infinite boundary condition. Furthermore, calculations taking into consideration effects such as spin orbital interaction and noncollinear magnetism are also supported.
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