Q: Should the Imam pause after reading al-Fatihah?
A: There are three pauses for the Imam in prayer.
1. Before al-Fatihah in the first rak'ah.
2. After reading al-Fatihah. This pause should be equal to al-Fatihah in lenght so the follower has time to recite al-Fatihah quietly.
3. After completing the second recital. This pause should be long enough for the follower to read a second chapter.
Source: Sharh al-Muntaha