Phase Dependent Thermopower in Andreev Interferometers
Jonghwa Eom, Chen-Jung Chien, Venkat Chandrasekhar
DOI 10.1103/PhysRevLett.81.437 · Physical Review Letters
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Abstract
We report measurements of the thermopower S of mesoscopic Andreev interferometers, which are hybrid loops with one arm fabricated from a superconductor (Al), and one arm from a normal metal (Au). S depends on the phase of electrons in the interferometer, oscillating as a function of magnetic flux with a period of one flux quantum Φ0=h/2e. The magnitude of S increases as the temperature T is lowered, reaching a maximum at T∼0.14 K, and decreases at lower temperatures. The symmetry of S oscillations with respect to magnetic flux depends on the topology of the sample.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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