A facility is provided for managing register maps for map-based indirect register file access within a processor. These mechanisms and methods for associating a plurality of stored elements with a creation of a patch can enable improved patch development for multi-tenant on-demand database systems, improved patch flexibility, etc. Compound semiconductor single crystals for photoelectric conversion elements having a hole concentration of 4\xd71015 cm\u22123 to 1\xd71018 cm\u22123 are produced in this manner.