Two-Dimensional Moire<acute accent> Polaronic Electron Crystals

被引：12

作者：

Arsenault, Eric A. ^{[1
]}

Li, Yiliu ^{[1
]}

Yang, Birui ^{[2
]}

Wang, Xi ^{[3
,4
]}

Park, Heonjoon ^{[3
]}

Mosconi, Edoardo ^{[5
]}

Ronca, Enrico ^{[6
]}

Taniguchi, Takashi ^{[7
]}

Watanabe, Kenji ^{[8
]}

Gamelin, Daniel ^{[4
]}

Millis, Andrew ^{[2
]}

Dean, Cory R. ^{[2
]}

de Angelis, Filippo ^{[1
,5
,6
,9
,10
]}

Xu, Xiaodong ^{[1
,3
,11
]}

Zhu, X. Y. ^{[1
]}

机构：

[1] Columbia Univ, Dept Chem, New York, NY 10027 USA

[2] Columbia Univ, Dept Phys, New York, NY 10027 USA

[3] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[4] Univ Washington, Dept Chem, Seattle, WA 98195 USA

[5] Ist CNR Sci & Tecnol Chim CNR SCITEC, CLHYO, I-06123 Perugia, Italy

[6] Univ Perugia, Dept Chem Biol & Biotechnol, I-06123 Perugia, Italy

[7] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton, Tsukuba, Ibaraki 3050044, Japan

[8] Natl Inst Mat Sci, Res Ctr Funct Mat, Tsukuba, Ibaraki 3050044, Japan

[9] Prince Mohammad Bin Fahd Univ, Dept Mech Engn, Al Khobar 31952, Saudi Arabia

[10] Sungkyunkwan Univ, SKKU Inst Energy Sci & Technol, Suwon 440746, South Korea

[11] Univ Washington, Dept Mat Sci Engn, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW LETTERS | 2024年 / 132卷 / 12期

基金：

欧洲研究理事会;

关键词：

STATES;

D O I：

10.1103/PhysRevLett.132.126501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Two-dimensional moire ' materials have emerged as the most versatile platform for realizing quantum phases of electrons. Here, we explore the stability origins of correlated states in WSe2/WS2 moire ' superlattices. We find that ultrafast electronic excitation leads to partial melting of the Mott states on timescales 5 times longer than predictions from the charge hopping integrals and that the melting rates are thermally activated, with activation energies of 18 +/- 3 and 13 +/- 2 meV for the one- and two-hole Mott states, respectively, suggesting significant electron-phonon coupling. A density functional theory calculation of the one-hole Mott state confirms polaron formation and yields a hole-polaron binding energy of 16 meV. These findings reveal a close interplay of electron-electron and electron-phonon interactions in stabilizing the polaronic Mott insulators at transition metal dichalcogenide moire ' interfaces.

引用

页数：6