The phrase "enlarge the gap" is correct and usable in written English.
You could use it to describe the effects of a situation in which one group of people has a distinct advantage over another, as in the following example: "The inequality between the wealthy and the poor continues to increase, as recent policies have only served to enlarge the gap."
Albertans have already grown richer than most other Canadians on the royalties from conventional oil, and exploiting the oil sands threatens to enlarge the gap.
These functional groups can enlarge the gap between adjacent GO sheets.
They notice that a distortive behaviour of retailers and food companies have concurred to enlarge the gap between farmers' and retailers' prices, and call for more research to evaluate buyers' power nature and causes.
Similarly, an increase in actual remuneration would enlarge the gap between desired and actual fringe benefits.
This however, will leave an important resource unused and will enlarge the gap between the German health care system and more team-oriented systems.
If hovering and holding balance is difficult for you, hold onto such as a handle or the toilet paper dispenser and/or enlarge the gap between your butt and the toilet.
The passivation of H atoms can improve the structural stability energetically and enlarges the energy gap.
Also, from equation (11), as the network size n increases, the numerator increases and the denominator decreases, which in turn enlarges the gap between the total welfares of the efficient networks.
The results showed that the etching treatment enlarged the gap space among the compact nanorods and hollowed out the center part of the nanorod to form a nanocave, and the wall of the nanocave split into lots of small nanowires; these changes in morphology lead to the improvement of the surface area.
They found that it had already been damaged, so the engineers planted their explosives and enlarged the gap to around 70 feet.
Homicide has the opposite effect, with a higher proportion of black victims enlarging the gap.
