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Emma C. Regan
Researcher at University of California, Berkeley
Publications - 36
Citations - 3368
Emma C. Regan is an academic researcher from University of California, Berkeley. The author has contributed to research in topics: Superlattice & Exciton. The author has an hindex of 15, co-authored 30 publications receiving 2036 citations. Previous affiliations of Emma C. Regan include Wellesley College & Lawrence Berkeley National Laboratory.
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Journal ArticleDOI
Observation of moiré excitons in WSe2/WS2 heterostructure superlattices.
Chenhao Jin,Emma C. Regan,Aiming Yan,Aiming Yan,M. Iqbal Bakti Utama,Danqing Wang,Sihan Zhao,Ying Qin,Sijie Yang,Zhiren Zheng,Shenyang Shi,Shenyang Shi,Kenji Watanabe,Takashi Taniguchi,Sefaattin Tongay,Alex Zettl,Alex Zettl,Feng Wang,Feng Wang +18 more
TL;DR: In this paper, the authors reported the observation of multiple emergent peaks around the original WSe2 A exciton resonance in the absorption spectra, and they exhibit gate dependences that are distinct from that of the A excitons in WSe 2/WS 2 heterostructures with large twist angles.
Journal ArticleDOI
Optical detection of Mott and generalized Wigner crystal states in WSe2/WS2 moiré superlattices
Emma C. Regan,Danqing Wang,Chenhao Jin,M. Iqbal Bakti Utama,Beini Gao,Xin Wei,Sihan Zhao,Wenyu Zhao,Kentaro Yumigeta,Mark Blei,Johan Carlstroem,Kenji Watanabe,Takashi Taniguchi,Sefaattin Tongay,Michael F. Crommie,Alex Zettl,Feng Wang +16 more
TL;DR: In this article, the optical detection of strongly correlated phases in semiconducting WSe2/WS2 moire superlattices is presented, revealing a Mott insulator state at one hole per super-lattice site and surprising insulating phases at fractional filling factors of 1/3 and 2/3.
Journal ArticleDOI
Observation of Moir\'e Excitons in WSe2/WS2 Heterostructure Superlattices
Chenhao Jin,Emma C. Regan,Aiming Yan,M. Iqbal Bakti Utama,Danqing Wang,Ying Qin,Sijie Yang,Zhiren Zheng,Kenji Watanabe,Takashi Taniguchi,Sefaattin Tongay,Alex Zettl,Feng Wang +12 more
TL;DR: In this article, the first observation of moir´e superlattice exciton states in nearly aligned WSe2/WS2 heterostructures was reported, where the periodic moir\'e potential is much stronger than the exciton kinetic energy and creates multiple flat exciton minibands.
Journal ArticleDOI
Ultrafast dynamics in van der Waals heterostructures.
Chenhao Jin,Eric Yue Ma,Ouri Karni,Emma C. Regan,Emma C. Regan,Feng Wang,Feng Wang,Tony F. Heinz,Tony F. Heinz +8 more
TL;DR: This Review focuses on unique excited-state dynamics in transition metal dichalcogenide (TMDC) heterostructures, the most widely studied 2D semiconductors, featuring prominent exciton states and accessibility to the valley degree of freedom.
Journal ArticleDOI
Mott and generalized Wigner crystal states in WSe2/WS2 moiré superlattices.
Emma C. Regan,Emma C. Regan,Danqing Wang,Danqing Wang,Chenhao Jin,Chenhao Jin,M. Iqbal Bakti Utama,M. Iqbal Bakti Utama,Beini Gao,Beini Gao,Xin Wei,Xin Wei,Sihan Zhao,Wenyu Zhao,Zuocheng Zhang,Kentaro Yumigeta,Mark Blei,Johan D. Carlström,Johan D. Carlström,Kenji Watanabe,Takashi Taniguchi,Sefaattin Tongay,Michael F. Crommie,Michael F. Crommie,Alex Zettl,Alex Zettl,Feng Wang,Feng Wang +27 more
TL;DR: In this paper, the authors used a sensitive optical detection technique and revealed a Mott insulator state at one hole per superlattice site and surprising insulating phases at 1/3 and 2/3 filling of the super-attice, which they assign to generalized Wigner crystallization on the underlying lattice.