The DMOs concerned with the In-Memory OLTP engine all have eXtreme Transaction Processing (XTP) in their name:

• sys.dm_db_xtp_checkpoint_stats
• sys.dm_db_xtp_checkpoint_files
• sys.dm_db_xtp_gc_cycles_stats
• sys.dm_xtp_gc_stats
• sys.dm_xtp_system_memory_consumers
• sys.dm_xtp_threads
• sys.dm_xtp_transaction_stats
• sys.dm_db_xtp_index_stats
• sys.dm_db_xtp_memory_consumers
• sys.dm_db_xtp_object_stats
• sys.dm_db_xtp_transactions
• sys.dm_db_xtp_table_memory_stats

Full details to the columns and meanings for each DMO can be found in Microsoft Books Online (https://msdn.microsoft.com/library/dn133203(SQL.130).aspx).