Electron delocalization in magnesium clusters grown in supercold helium droplets

被引：112

作者：

Diederich, T ^{[1
]}

Döppner, T ^{[1
]}

Braune, J ^{[1
]}

Tiggesbäumker, J ^{[1
]}

Meiwes-Broer, KH ^{[1
]}

机构：

[1] Univ Rostock, Fachbereich Phys, D-18051 Rostock, Germany

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.86.4807

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The formation of bare clusters from highly reactive metals can be achieved very effectively by the pickup of atoms into superfluid helium droplets. We report on the experimental observation of electronic shells in small magnesium clusters produced by this method. Mass spectra taken under various ionization conditions show steps and outstanding peaks, as well as pronounced minima. The abundance distribution suggests a transition to full electron delocalization which is complete at about 20 atoms. A so-far-not-reported electron reorganization is observed, leading to a novel shell structure.

引用

页码：4807 / 4810

页数：4

共 35 条

[1]

[Anonymous], METAL CLUSTERS

[2] Electrons in artificial atoms [J].

Ashoori, RC .

NATURE, 1996, 379 (6564) :413-419

[3] Cold metal clusters: Helium droplets as a nanoscale cryostat [J].

Bartelt, A ;

Close, JD ;

Federmann, F ;

Quaas, N ;

Toennies, JP .

PHYSICAL REVIEW LETTERS, 1996, 77 (17) :3525-3528

[4] AN RPA PROGRAM FOR JELLIUM SPHERES [J].

BERTSCH, G .

COMPUTER PHYSICS COMMUNICATIONS, 1990, 60 (02) :247-255

[5]

Bohr A., 1998, Nuclear Structure, Volume 2: Nuclear Deformations, V2

[6]

BOWEN KH, UNPUB

[7] THE PHYSICS OF SIMPLE METAL-CLUSTERS - SELF-CONSISTENT JELLIUM MODEL AND SEMICLASSICAL APPROACHES [J].

BRACK, M .

REVIEWS OF MODERN PHYSICS, 1993, 65 (03) :677-732

[8] Interband effect in the optical response of strontium clusters [J].

Bréchignac, C ;

Cahuzac, P ;

Kébaili, N ;

Leygnier, J ;

Yoshida, H .

PHYSICAL REVIEW B, 2000, 61 (11) :7280-7283

[9] PROBING THE TRANSITION FROM VANDERWAALS TO METALLIC MERCURY CLUSTERS [J].

BRECHIGNAC, C ;

BROYER, M ;

CAHUZAC, P ;

DELACRETAZ, G ;

LABASTIE, P ;

WOLF, JP ;

WOSTE, L .

PHYSICAL REVIEW LETTERS, 1988, 60 (04) :275-278

[10] Direct observation of band-gap closure in mercury clusters [J].

Busani, R ;

Folkers, M ;

Cheshnovsky, O .

PHYSICAL REVIEW LETTERS, 1998, 81 (18) :3836-3839

← 1 2 3 4 →