TY - RPRT TI - Ultra-high-quality two-dimensional electron systems AU - Chung, Yoon Jang AU - Villegas Rosales, K. A. (ORCID:0000000340500547) AU - Baldwin, K. W. AU - Madathil, P. T. AU - West, K. W. AU - Shayegan, M. (ORCID:0000000254381932) AU - Pfeiffer, L. N. PY - 2021 DO - 10.1038/s41563-021-00942-3 UR - https://www.osti.gov/biblio/1849359 ID - 1849359 ER -