"a dynamic between" is correct and usable in written English
The phrase is used to describe the relationship between two or more entities. For example, "The relationship between the two sisters is an intriguing dynamic between them".
"There's a dynamic between the pair, which is infinitely more interesting than one person's psychosis or whether their girlfriend's left them or not," he explains.
The opening episode tries to set up a dynamic between the insoles and another invention that Mr. Mays and Mr. Sullivan take on, a coffee-mug-shaped thing that's designed to hold your car's G.P.S. device so that it can ride in a cupholder rather than in the middle of the windshield.
In the chapters about molecular biology and geology, you find the three elements, and scientific change is seen as a dynamic between them (see paragraph 2 above).
Based on field work, it is concluded that the experience of the Dracula tourist is characterised by a dynamic between two partially contradictory modes.
It operates on a dynamic between the traditional, timeless, and sacred versus the engaged and called-upon-to-act.
A dynamic between the three male protagonists Jimmy, Dave, and Sean is established at the very beginning of the story.
Molecular dynamics simulations and SAXS demonstrate a dynamic equilibrium between open and closed conformations in solution.
Particularly during the final three months, there is an awareness of this other person and a dynamic emerging between them.
Thus, bud dormancy is a dynamic interaction between growth promoters and growth inhibitors.
Brevity often invites speculation and facilitates a dynamic interaction between reader and writing.
The result is a dynamic synergy between the atmosphere and biosphere.
