Plasma-metal junction

被引：10

作者：

Arumugam, Saravanan ^{[1
,2
]}

Perumal, M. ^{[1
]}

Anjana, K. P. ^{[1
,3
]}

Satyanarayna, S. V. M. ^{[1
]}

Sinha, Suraj Kumar ^{[1
]}

机构：

[1] Pondicherry Univ, Dept Phys, Pondicherry 605014, India

[2] HBNI, Inst Plasma Res, Gandhinagar 382428, Gujarat, India

[3] Amrita Vishwa Vidyapeetham, Dept Phys, Kollam 641112, India

来源：

PHYSICS OF PLASMAS | 2020年 / 27卷 / 02期

关键词：

PROBES;

D O I：

10.1063/1.5125618

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

In this work, the concept of plasma-metal junction (pm-junction) is presented, in addition to well established physics of pn-junction, metal-semiconductor junction, semiconductor-insulator junction, etc. We demonstrate experimentally the dependence of I-V characteristics on work function of the metal for a pm-junction. The experiment is done using tungsten (W) and stainless steel (SS) having different work functions (Phi(m)) of 4.55 eV and 4.30 eV, respectively. The W and SS planar metal probes of identical geometry were exposed to plasma simultaneously, making two distinct pm-junctions. The plasma exposed is identical for both the metals, and therefore, the difference observed in the I-V characteristics of these two pm-junctions is attributed only to the difference in an energy-band diagram of these junctions, owing to respective work function. The proposed concept of the pm-junction may simplify the complex plasma-material interactions in all laboratory plasmas, including cold glow discharges to hot fusion plasmas. Published under license by AIP Publishing.

引用

页数：10

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