TY - JOUR AU - Oszwałdowski, R. AU - Reichelt, Matthias AU - Meier, Torsten AU - Koch, S. W. AU - Rohlfing, Michael ID - 23503 IS - 23 JF - Physical Review B SN - 1098-0121 TI - Nonlinear optical response of the Si ( 111 ) − ( 2 × 1 ) surface exciton: Influence of biexciton many-body correlations VL - 71 ER -