Equation 10 · Part 1 · A Strained Crystal Is a Designer Spacetime
subscript
subscript
What this part means
The lower label selects a particular version, component, or indexed member of the quantity. For example, x₀ and xₜ can be values at different positions.
Its job in the formula
A subscript distinguishes a version, component, step, or member of a quantity. It does not automatically mean multiplication.
Full expression→subscript→Article meaning
The passage around this formula
Turning that mathematics into a device means choosing a crystal whose tilt sits close to the critical value already, at rest, so that an achievable amount of strain can push it the rest of the way across. Push too little strain onto a crystal whose tilt starts far below 1 and the crossing never arrives before the crystal’s elastic limit does; start from a crystal whose tilt is already far above 1 and the crossing needs a strain the lattice cannot survive. The paper’s candidate is the tungsten ditelluride and molybdenum ditelluride family, sitting close enough to the type-I/type-II boundary that density-functional calculations already show strain can drive the transition, with the…
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.
Open the illustrated subscripts: which member of a family? guide →
Sources cited in the surrounding passage
These citations provide research context; check each source for the exact claim it supports.