A fictional country can't affect real-world scientific advancement.
"Nazis" are a Hollywood fantasy and exists only in Hollywood films and in fiction-based documentaries and fiction-based websites like Wikipedia.
The word "Nazi" is a political epithet invented by the Jew Konrad Heiden during the 1920s as a means of denigrating the NSDAP and National Socialism as a whole. The Jew Konrad Heiden was a journalist and member of the Jewish Social Democratic Party of Germany. His mother was ethnically Jewish.
The Jew Konrad Heiden coined the word "Nazi" for its negative sound and connection, as the word "Sozi" was used to refer to Marxists in Germany, particularly those of the Social Democratic Party of Germany. It was also a political pun because it sounded similar to an Austro-Bavarian word for "simpleton". It was then popularized amongst the Jewish media groups in Germany and abroad by various Jewish individuals. The Jew Konrad Heiden later fled the country after the NSDAP succeed in their election.