Quantitative measure of nitrogen vacancy related effects in SmN and EuN

被引：3

作者：

Azeem, Muhammad ^{[1
,2
]}

机构：

[1] Univ Sharjah, Dept Appl Phys & Astron, Sharjah 27272, U Arab Emirates

[2] Victoria Univ, MacDiarmid Inst Adv Mat & Nanotechnol, Sch Chem & Phys Sci, Wellington 6140, New Zealand

来源：

ADVANCES IN NATURAL SCIENCES-NANOSCIENCE AND NANOTECHNOLOGY | 2019年 / 10卷 / 01期

关键词：

optical properties; thin films; ferromagnetic semiconductors; spintronics;

D O I：

10.1088/2043-6254/ab007d

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Density of charge carriers, introduced due to nitrogen vacancies, is estimated for SmN and EuN thin films SmN is found to be weakly doped by nitrogen vacancies with an estimated carrier density of the order of 10(24)- 10(25) m(-3) whereas the EuN thin film is heavily doped with the carrier density of the order 10(27) m(-3). The free carriers cause the significant optical absorption in the sub-gap region and mask the true energy gap. Further, the onset of the interband transition for the SmN is around 1.2 eV and for the EuN it is 0.9 eV. The results indicate a disagreement in the theoretical and the experimental values.

引用

页数：5

共 18 条

[1] Optical response of DyN [J].

Azeem, M. ;

Ruck, B. J. ;

Binh Do Le ;

Warring, H. ;

Trodahl, H. J. ;

Strickland, N. M. ;

Koo, A. ;

Goian, V. ;

Kamba, S. .

JOURNAL OF APPLIED PHYSICS, 2013, 113 (20)

[2]

Azeem M., 2013, THESIS

[3] On the optical energy gap of SmN [J].

Azeem, Muhammad .

CHINESE JOURNAL OF PHYSICS, 2018, 56 (05) :1925-1930

[4] Spin polarized conduction and valence band states in GdN [J].

Muhammad Azeem .

MRS Advances, 2017, 2 (3) :153-158

[5] Spin-Split Joint Density of States in GdN [J].

Azeem, Muhammad .

CHINESE PHYSICS LETTERS, 2016, 33 (02)

[6]

Bandyopadhyay S., 2008, Introduction to spintronics

[7]

BUSCH G, 1969, HELV PHYS ACTA, V42, P930

[8] Electronic structure of rare-earth nitrides using the LSDA plus U approach:: Importance of allowing 4f orbitals to break the cubic crystal symmetry [J].

Larson, P. ;

Lambrecht, Walter R. L. ;

Chantis, Athanasios ;

van Schilfgaarde, Mark .

PHYSICAL REVIEW B, 2007, 75 (04)

[9] Rare-earth mononitrides [J].

Natali, F. ;

Ruck, B. J. ;

Plank, N. O. V. ;

Trodahl, H. J. ;

Granville, S. ;

Meyer, C. ;

Lambrecht, W. R. L. .

PROGRESS IN MATERIALS SCIENCE, 2013, 58 (08) :1316-1360

[10] Role of magnetic polarons in ferromagnetic GdN [J].

Natali, F. ;

Ruck, B. J. ;

Trodahl, H. J. ;

Le Binh, Do ;

Vezian, S. ;

Damilano, B. ;

Cordier, Y. ;

Semond, F. ;

Meyer, C. .

PHYSICAL REVIEW B, 2013, 87 (03)

← 1 2 →