Phonon-mediated tunneling into a two-dimensional electron gas on the Be(0001) surface

被引：2

作者：

Osterhage, Hermann ^{[1
]}

Wiesendanger, Roland ^{[1
]}

Krause, Stefan ^{[1
]}

机构：

[1] Univ Hamburg, Dept Phys, Jungiusstr 11, D-20355 Hamburg, Germany

来源：

PHYSICAL REVIEW B | 2021年 / 103卷 / 15期

关键词：

STATE; OSCILLATIONS; SCATTERING; LIFETIME; DYNAMICS; LAYER;

D O I：

10.1103/PhysRevB.103.155428

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electronic properties of the Be(0001) surface are investigated on the atomic scale at low temperature. Utilizing laterally resolved scanning tunneling spectroscopy (STS) a pronounced surface state is identified, additionally manifested by the observation of bias-dependent standing-wave patterns. Fourier analysis reveals a parabolic dispersive behavior, being characteristic for a two-dimensional free-electron gas confined to the Be(0001) surface. Moreover, signatures of the opening of inelastic phonon-mediated tunnel channels for electrons near the Fermi level are observed by STS.

引用

页数：7

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