Anisotropic electron-phonon coupling on a two-dimensional circular Fermi contour

被引：10

作者：

Chien, Teyu ^{[1
]}

Rienks, Emile D. L. ^{[2
,3
]}

Jensen, Maria Fuglsang ^{[2
,3
]}

Hofmann, Philip ^{[2
,3
]}

Plummer, E. W. ^{[1
,4
]}

机构：

[1] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[2] Univ Aarhus, Inst Storage Ring Facil, DK-8000 Aarhus C, Denmark

[3] Univ Aarhus, Interdisciplinary Nanosci Ctr iNANO, DK-8000 Aarhus C, Denmark

[4] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 24期

关键词：

beryllium; electron-phonon interactions; Fermi surface; photoelectron spectra; surface states; BE(0001); SURFACE;

D O I：

10.1103/PhysRevB.80.241416

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Angle-resolved photoemission reveals that the electron-phonon coupling (EPC) around the circular Fermi contour of the Be(0001) Gamma surface state is strongly anisotropic. The mass enhancement parameter lambda is found to range from values of similar to 1, along high-symmetry directions, to similar to 0.6 in between in stark contrast to the theoretical calculations. Given the simplicity of this system it furnishes an ideal prototype for unraveling the origin of anisotropic EPC in two-dimensional materials.

引用

页数：4

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