Home▸Quantum Physics▸Scanning Tunneling Spectroscopy: Mapping the Local Density of States

Scanning Tunneling Spectroscopy: Mapping the Local Density of States (2D)

Drag a 2D STM tip across an atomic lattice sprinkled with acceptor and donor defect sites, sweep the bias voltage, and watch dI/dV reveal each site's own local density of states — then switch to constant-current topography and watch electronic structure masquerade as surface height.

Quantum Physics2DAdvanced60 FPS📱 Mobile-adapted⇄ 3D version

This 2D counterpart to the 3D STM/STS simulator replaces its three fixed sample sites with an editable atomic lattice. Click any atom to plant an acceptor or donor defect at a chosen energy, drag the tip to any point on the surface, and sweep the bias voltage: the dI/dV spectrum drawn live is computed from a genuine spatially-varying local density of states, LDOS(x,y,E), that decays with distance from each defect exactly as a real impurity resonance does. Switch to topography mode and the tip auto-rasters the whole lattice holding the tunneling current constant — the image it builds mixes true geometric height with electronic corrugation from your defects, the same conflation a real constant-current STM image always carries.

⚙ Under the hood

Drag the STM tip across a lattice, adjust bias voltage, and watch the dI/dV spectrum reveal electronic states in metals, semiconductors, or samples with defects.

STMtunneling spectroscopydensity of statesquantum mechanicsband gapmolecular orbitals

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install