Equation 9 · Part 1 · From Origins to Frontier: A History of Quantum and Condensed-Matter Systems
Symbol T_c
What this part means
is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol T_c→Article meaning
The passage around this formula
…beginning near 35 kelvin — still cold by ordinary standards, but 12 kelvin above the prior record, in a material class nobody expected to superconduct at all. They published cautiously, titling the paper “Possible High- Superconductivity in the Ba-La-Cu-O System” in Zeitschrift für Physik B in April 1986 [ 4 ] . The paper drew no citations for the rest of that year. Once other laboratories reproduced and then exceeded the result — yttrium barium copper oxide reached 92 kelvin within months, above the boiling…
Learn the underlying idea
A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
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Sources cited in the surrounding passage
- [4] This month in physics history: April 1986 — Bednorz and Muller discover high-temperature superconductivity ↗
- [5] Perovskite-Type Oxides — The New Approach to High-Tc Superconductivity (Nobel Lecture) ↗
These citations provide research context; check each source for the exact claim it supports.