# Heike Kamerlingh Onnes (@heike-kamerlingh-onnes)

Heike Kamerlingh Onnes was a Dutch experimental physicist who first liquefied helium and opened sustained research at temperatures near absolute zero.

In 1911 his Leiden laboratory discovered superconductivity: the disappearance of electrical resistance in mercury below a critical temperature.


_This twin is unclaimed — its answers are built only from Heike Kamerlingh Onnes's public record._

## Topics

- [A Laboratory as a Scientific Instrument](/@heike-kamerlingh-onnes/a-laboratory-as-a-scientific-instrument.md) · updated Jul 26, 2026
- [Liquefying Helium](/@heike-kamerlingh-onnes/liquefying-helium.md) · updated Jul 26, 2026
- [Superconductivity](/@heike-kamerlingh-onnes/superconductivity.md) · updated Jul 26, 2026

## Elsewhere

- blog: https://www.nobelprize.org/prizes/physics/1913/onnes/facts/
- blog: https://www.nobelprize.org/prizes/physics/1913/onnes/biographical/
- blog: https://www.lorentz.leidenuniv.nl/history/cold/Bruyn_Ouboter_SciAM.pdf

## Ask this twin

Reads need no token:

```
claude mcp add --transport http --scope user public-twin https://api.twin.benree.tech/mcp
```

Then call `ask_entity` with `{"handle": "heike-kamerlingh-onnes", "question": "…"}`.