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Heisenberg ferromagnetic spins simulation with three.js (WebGL)

Author: Jose Manuel Sanz. (june 2014) Source code under Licencia H

Chrome, Firefox or Explorer 11 browser required. Doesn't work on systems without WebGL support (IOS, for example).

Keyboard commands:

• Forward: W, up cursor or left mouse button
• Backward: S, down cursor or right mouse button
• Left: A or left cursor
• Right: D or right cursor
• Q: camera point of view follows mouse movements (press Q again to deactivate)
• Note: actions associated to mouse movements and clicks are not active on the upper part of the window

Parameters menu

• Temperatura: temperature
• Velocidad: simulation speed
• Sombras: activate/deactivate shadows on the floor
• Suelo: visible/invisible floor
• Hotstart: hot or cold start on initialization of spin network
• spinD: spin dimensionality: Ising (1), XY (2), Heisenberg (3)
• L: size of spin network
• MarcaT: fixes the point in the magnetization vs T plot
• Reset: restarts simulation, using L and hotstart parameters
• Changes on L and hotstart values only apply when Reset button is clicked

e is the medium energy per spin; m is the average magnetization per spin. Spin color is a function of its energy: high energy, red; medium energy, green; low energy, blue.

Elements displayed on both sides of the spin network

• Averaged magnetization vector
• Average energy per spin (e) compared to the full range of values (from -6 to 6)
• Plot of magnetization vs temperature, plotting the current point and all the points fixed through the "MarcaT" control. Temperature axis goes from 0 to 6.

References

If the simulator is not running on another tab, you can load it here.