Growth and characterization of rare-earth monosulfides for cold cathode applications

被引：19

作者：

Modukuru, Y ^{[1
]}

Thachery, J ^{[1
]}

Tang, H ^{[1
]}

Malhotra, A ^{[1
]}

Cahay, M ^{[1
]}

Boolchand, P ^{[1
]}

机构：

[1] Univ Cincinnati, Dept Elect & Comp Engn, Cincinnati, OH 45221 USA

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B | 2001年 / 19卷 / 05期

关键词：

D O I：

10.1116/1.1406158

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We report the successful growth of bulk cubic lanthanum sulfide (LaS) and neodymium sulfide (NdS). Powder x-ray diffraction scans of the samples show the rocksalt phase with a lattice constant a(0) = 5.857(2) Angstrom and 5.694(2) Angstrom for LaS and NdS, respectively. In Raman scattering, one observes the vibrational density of states (cubic symmetry) and identifies the longitudinal optical and transverse acoustic phonons at 261(284) and 100(92) cm(-1) with LaS(NdS), respectively. These rare-earth monosulfides offer attractive alternatives to the commonly used cesiated surfaces to reach negative electron affinity at various III-V semiconductor surfaces. (C) 2001 Americana Vacuum.

引用

页码：1958 / 1961

页数：4

共 14 条

[1]

BELL PR, 1973, NEGATIVE ELECT AFFIN

[2]

BRODIE I, 1992, ADV ELECTRONICS ELEC, V83, P2

[3] Electronic structure of the LaS surface and LaS/CdS interface [J].

Eriksson, O ;

Wills, J ;

Mumford, P ;

Cahay, M ;

Friz, W .

PHYSICAL REVIEW B, 1998, 57 (07) :4067-4072

[4]

ERIKSSON O, UNPUB

[5]

FOMENKO S, 1966, HDB THERMIONIC PROPE

[6] POINT-CONTACT SPECTROSCOPY ON LAS, GDS AND TMSE [J].

FRANKOWSKI, I ;

WACHTER, P .

SOLID STATE COMMUNICATIONS, 1981, 40 (09) :885-888

[7]

GOLUBKOV AV, 1966, IAN SSSR NEORG MATER, V2, P77

[8] A SURVEY OF THE PRESENT STATUS OF VACUUM MICROELECTRONICS [J].

IANNAZZO, S .

SOLID-STATE ELECTRONICS, 1993, 36 (03) :301-320

[9]

MALHOTRA A, 1999, THESIS U CINCINNATI

[10] Current crowding effects in a CdS/LaS cold cathode [J].

Mumford, PD ;

Cahay, M .

JOURNAL OF APPLIED PHYSICS, 1997, 81 (08) :3707-3715

← 1 2 →