Hot carrier diodes
Shottky diodes, aka "hot carrier diodes", are often used as the rectifiers in high-efficiency power supplies, such as SMPS or "switchers" as they're commonly called. Their lower forward drop increases the efficiency by not having that power loss just from the rectification process. Shottkys are not perfect by any means. Although they have a low forward drop, they also suffer from a lower reverse resistance than silicon diodes which can be problematic in some circuitry, so you have to use them with care.
Dean