Observations of plasmarons in a two-dimensional system: Tunneling measurements using time-domain capacitance spectroscopy

被引：13

作者：

Dial, O. E. ^{[1
]}

Ashoori, R. C. ^{[1
]}

Pfeiffer, L. N. ^{[2
]}

West, K. W. ^{[2
]}

机构：

[1] MIT, Cambridge, MA 02139 USA

[2] Princeton Univ, Princeton, NJ 08544 USA

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 08期

关键词：

SINGLE-PARTICLE SPECTRUM; ELECTRON-GAS; EXCITATIONS;

D O I：

10.1103/PhysRevB.85.081306

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Calculations of the single-particle density of states (SPDOS) of electron liquids have long predicted that there exist two distinct charged excitations: the usual quasiparticle consisting of an electron or hole, and a plasmaron consisting of a hole resonantly bound to real plasmons in the Fermi sea. Using tunneling spectroscopy to measure the SPDOS of a 2D electronic system, we demonstrate the detection of a plasmaron in a 2D system in which electrons have mass. With the application of a magnetic field we discover unpredicted magnetoplasmarons which resemble Landau levels with a negative index.

引用

页数：4