Electronic interactions in Dirac fluids visualized by nano-terahertz spacetime interference of electron-photon quasiparticles

被引：3

作者：

Xu, Suheng ^{[1
]}

Li, Yutao ^{[1
,2
]}

Vitalone, Rocco A. ^{[1
]}

Jing, Ran ^{[1
,3
,4
]}

Sternbach, Aaron J. ^{[1
,5
]}

Zhang, Shuai ^{[1
]}

Ingham, Julian ^{[1
]}

Delor, Milan ^{[6
]}

Mciver, James W. ^{[1
]}

Yankowitz, Matthew ^{[7
,8
]}

Queiroz, Raquel ^{[1
]}

Millis, Andrew J. ^{[1
,9
]}

Fogler, Michael M. ^{[10
]}

Dean, Cory R. ^{[1
]}

Pasupathy, Abhay N. ^{[1
]}

Hone, James ^{[11
]}

Liu, Mengkun ^{[3
,12
]}

Basov, D. N. ^{[1
]}

机构：

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

[2] Brookhaven Natl Lab, Upton, NY 11973 USA

[3] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

[4] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

[5] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

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

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

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

[9] Flatiron Inst, Ctr Computat Quantum Phys, 162 5th Ave, New York, NY 10010 USA

[10] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[11] Columbia Univ, Dept Mech Engn, New York, NY 10027 USA

[12] Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA

来源：

SCIENCE ADVANCES | 2024年 / 10卷 / 43期

关键词：

HOLE SCATTERING; POLARITON PROPAGATION; GRAPHENE; PLASMONS; WAVES;

D O I：

10.1126/sciadv.ado5553

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Ultraclean graphene at charge neutrality hosts a quantum critical Dirac fluid of interacting electrons and holes. Interactions profoundly affect the charge dynamics of graphene, which is encoded in the properties of its electron-photon collective modes: surface plasmon polaritons (SPPs). Here, we show that polaritonic interference patterns are particularly well suited to unveil the interactions in Dirac fluids by tracking polaritonic interference in time at temporal scales commensurate with the electronic scattering. Spacetime SPP interference patterns recorded in terahertz (THz) frequency range provided unobstructed readouts of the group velocity and lifetime of polariton that can be directly mapped onto the electronic spectral weight and the relaxation rate. Our data uncovered prominent departures of the electron dynamics from the predictions of the conventional Fermi-liquid theory. The deviations are particularly strong when the densities of electrons and holes are approximately equal. The proposed spacetime imaging methodology can be broadly applied to probe the electrodynamics of quantum materials.

引用

页数：7