Multilayer thermal expansion of Be(0001) determined from surface core level shifts

被引:7
作者
Baraldi, A
Lizzit, S
Pohl, K
Hofmann, P
de Gironcoli, S
机构
[1] Sincrotrone Trieste SCpA, I-34012 Trieste, Italy
[2] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy
[3] INFM, Lab TASC, I-34012 Trieste, Italy
[4] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA
[5] Univ Aarhus, Inst Storage Ring Facilities, DK-8000 Aarhus C, Denmark
[6] SISSA, I-34014 Trieste, Italy
[7] INFM, I-34014 Trieste, Italy
来源
EUROPHYSICS LETTERS | 2003年 / 64卷 / 03期
关键词
D O I
10.1209/epl/i2003-00203-9
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We have determined the thermal expansion of the first three interlayer spacings of Be(0001) by comparing measured temperature-dependent surface core level shifts and surface state positions to values calculated with Density Functional Theory for different surface geometries. Our results reveal that, in the temperature range from 300 to 700 K, the 1st-to-2nd, 2nd-to-3rd and 3rd-to-4th interlayer coefficient of thermal expansion are 88 +/- 15, -10 +/- 15 and -6 +/- 20 x 10(-6) K(-1), respectively. We have now set Be(0001) as a challenge for further theoretical improvements, since a complete theoretical understanding of surface thermal expansion does not exist.
引用
收藏
页码:364 / 370
页数:7
相关论文
共 22 条
[1]   Validity of the quasiharmonic analysis for surface thermal expansion of Ag(111) [J].
Al-Rawi, AN ;
Kara, A ;
Staikov, P ;
Ghosh, C ;
Rahman, TS .
PHYSICAL REVIEW LETTERS, 2001, 86 (10) :2074-2077
[2]   Strong phonon replicas in Be 1s photoemission spectra [J].
Andersen, JN ;
Balasubramanian, T ;
Almbladh, CO ;
Johansson, LI ;
Nyholm, R .
PHYSICAL REVIEW LETTERS, 2001, 86 (19) :4398-4401
[3]   Time resolved core level photoemission experiments with synchrotron radiation [J].
Baraldi, A ;
Barnaba, M ;
Brena, B ;
Cocco, D ;
Comelli, G ;
Lizzit, S ;
Paolucci, G ;
Rosei, R .
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1995, 76 :145-149
[4]  
CEPERLEY DM, 1981, PHYS REV B, V23, P5048
[5]  
DEGIRONCOLI S, UNPUB
[6]   MANY-ELECTRON SINGULARITY IN X-RAY PHOTOEMISSION AND X-RAY LINE SPECTRA FROM METALS [J].
DONIACH, S ;
SUNJIC, M .
JOURNAL OF PHYSICS PART C SOLID STATE PHYSICS, 1970, 3 (02) :285-&
[7]  
HANNON JB, 1994, THESIS U PENNSYLVANI
[8]   Surface oscillatory thermal expansion: Mg(10(1)over-bar0) [J].
Ismail ;
Plummer, EW ;
Lazzeri, M ;
de Gironcoli, S .
PHYSICAL REVIEW B, 2001, 63 (23)
[9]   Fourth-layer surface core-level shift on Be(0001) [J].
Johansson, LI ;
Glans, PA ;
Balasubramanian, T .
PHYSICAL REVIEW B, 1998, 58 (07) :3621-3624
[10]   EFFICACIOUS FORM FOR MODEL PSEUDOPOTENTIALS [J].
KLEINMAN, L ;
BYLANDER, DM .
PHYSICAL REVIEW LETTERS, 1982, 48 (20) :1425-1428