---
title: "Liquid helium: building access to a new temperature range"
description: "Why was liquefying helium a scientific instrument as well as a technical feat?"
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[Cold liquids and superconducting order](https://sandboxphysics.com/stories/condensed-matter/#collective)

Materials · Measurements · Explanation

# Liquid helium: building access to a new temperature range

Why was liquefying helium a scientific instrument as well as a technical feat?

Sandbox Physics · 2026-10-23

Nobel contribution: 1913-1

1. Precool and compress helium
2. Expand it in a controlled cycle
3. Maintain a cold liquid bath
4. Measure how matter changes

Helium liquefaction in 1908 and the mercury-resistance transition in 1911 are separate milestones leading to the 1913 award.

## A stable bath made comparisons possible

Kamerlingh Onnes first liquefied helium in 1908 after developing a system of gas purification, precooling and controlled expansion. The liquid bath gave the laboratory a repeatable route to temperatures unavailable with hydrogen alone.

A reliable cold environment mattered because a material property could now be followed through a temperature interval without rebuilding the entire experiment at each point.

Sources: [1]

## Resistance changed abruptly in mercury

In 1911, cooling mercury into the helium range revealed an abrupt disappearance of measurable electrical resistance. That sharp change differed from a smooth improvement in an ordinary conductor and opened the study of superconductivity.

Sources: [1] [2]

## A resistance limit is still a measurement limit

An experiment reports how small a voltage or resistance it can resolve at a specified current. Contacts, lead resistance, thermometer calibration and heat leakage matter. Establishing magnetic flux exclusion later added a distinct property to the definition of the superconducting state.

Sources: [1] [3]

## The award covered a research method and its discoveries

The 1913 award concerned low-temperature investigations leading, among other achievements, to liquid helium. The critical-field Lab follows one later consequence: a superconducting state can be destroyed by temperature or field. Its near-transition model does not reproduce the historical liquefier.

Sources: [1] [4]

Continue with the physics

## Try the related models

### [Superconducting critical fields](https://sandboxphysics.com/labs/superconductor-critical-fields/)

Compare flux exclusion, vortex entry and destruction of superconductivity.

The isotropic Ginzburg–Landau model applies near the transition and is not a quantitative cuprate phase diagram.

## Sources and reading notes

1. [Kamerlingh Onnes: low-temperature investigations (1913)](https://www.nobelprize.org/uploads/2018/06/onnes-lecture.pdf)

   The laboratory’s cooling methods, resistance observations and practical measurement difficulties.

2. [Schrieffer: Macroscopic quantum phenomena from pairing (1972)](https://www.nobelprize.org/uploads/2018/06/schrieffer-lecture.pdf)

   The microscopic pairing theory is tested through several observables, not zero resistance alone.

3. [Bardeen, Cooper and Schrieffer: Theory of superconductivity (1957)](https://doi.org/10.1103/PhysRev.108.1175)

   The original microscopic theory compares its predictions with heat capacity, penetration and gap evidence.

4. [Nobel Prize in Physics 1913: official award](https://www.nobelprize.org/prizes/physics/1913/summary/)

   Official attribution and award year. The observation or theoretical paper may be much earlier.

[Condensed matter: from a material to its evidence](https://sandboxphysics.com/stories/condensed-matter/) [Landau’s helium: describe the liquid’s excitations](https://sandboxphysics.com/stories/condensed-matter/landau-superfluid-helium/) [Kapitsa’s helium flow: viscosity depended on how it was tested](https://sandboxphysics.com/stories/condensed-matter/kapitsa-helium-flow/) [BCS theory: one paired state had to explain several experiments](https://sandboxphysics.com/stories/condensed-matter/bcs-pairing-evidence/) [Giaever’s junction: current revealed the superconducting gap](https://sandboxphysics.com/stories/condensed-matter/giaever-gap-spectroscopy/) [Josephson’s prediction: phase could drive a zero-voltage current](https://sandboxphysics.com/stories/condensed-matter/josephson-phase-current/) [Cuprate superconductivity: a ceramic changed the temperature scale](https://sandboxphysics.com/stories/condensed-matter/cuprate-superconductivity/) [Helium-three: a pressure anomaly changed its interpretation](https://sandboxphysics.com/stories/condensed-matter/helium-three-superfluid/) [Ginzburg–Landau theory: describe how superconducting order varies](https://sandboxphysics.com/stories/condensed-matter/ginzburg-landau-order/) [Abrikosov vortices: magnetic flux entered without ending superconductivity](https://sandboxphysics.com/stories/condensed-matter/abrikosov-vortex-lattice/) [Leggett’s helium-three: resonance identified the pairing order](https://sandboxphysics.com/stories/condensed-matter/leggett-helium-three/)