scholarly journals Solution to sign problems in half-filled spin-polarized electronic systems

2014 ◽  
Vol 89 (11) ◽  
Author(s):  
Emilie Fulton Huffman ◽  
Shailesh Chandrasekharan
Keyword(s):  
Electronic Systems ◽  
Spin Polarized ◽  
Sign Problems

scholarly journals Persistent optical gating of a topological insulator

2015 ◽  
Vol 1 (9) ◽  
pp. e1500640 ◽  
Author(s):  
Andrew L. Yeats ◽  
Yu Pan ◽  
Anthony Richardella ◽  
Peter J. Mintun ◽  
Nitin Samarth ◽  
...  
Keyword(s):  
Chemical Potential ◽  
Surface States ◽  
Optical Control ◽  
Electronic Systems ◽  
Optical Gating ◽  
Wide Range ◽  
Spin Polarized ◽  
Electrostatic Gating ◽  
Polarized Surface ◽  
Insulating Phase

The spin-polarized surface states of topological insulators (TIs) are attractive for applications in spintronics and quantum computing. A central challenge with these materials is to reliably tune the chemical potential of their electrons with respect to the Dirac point and the bulk bands. We demonstrate persistent, bidirectional optical control of the chemical potential of (Bi,Sb)2Te3thin films grown on SrTiO3. By optically modulating a space-charge layer in the SrTiO3substrates, we induce a persistent field effect in the TI films comparable to electrostatic gating techniques but without additional materials or processing. This enables us to optically pattern arbitrarily shapedp- andn-type regions in a TI, which we subsequently image with scanning photocurrent microscopy. The ability to optically write and erase mesoscopic electronic structures in a TI may aid in the investigation of the unique properties of the topological insulating phase. The gating effect also generalizes to other thin-film materials, suggesting that these phenomena could provide optical control of chemical potential in a wide range of ultrathin electronic systems.

Spin-polarized Scanning Electron Microscopy

1990 ◽  
Vol 48 (4) ◽  
pp. 768-769
Author(s):  
Kazuyuki Koike ◽  
Hideo Matsuyama
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
High Speed ◽  
Magnetic Thin Films ◽  
Electron Spin Polarization ◽  
Acquisition Time ◽  
Magnetization Direction ◽  
Spin Polarized ◽  
Conventional Methods ◽  
Scanning Electron

Spin-polarized scanning electron microscopy (spin SEM), where the secondary electron spin polarization is used as the image signal, is a novel technique for magnetic domain observation. Since its first development by Koike and Hayakawa in 1984, several laboratories have extensively studied this technique and have greatly improved its capability for data extraction and its range of applications. This paper reviews the progress over the last few years.Almost all the high expectations initially held for spin SEM have been realized. A spatial resolution of several hundreds angstroms has been attained, which is nearly one order of magnitude higher than that of conventional methods for thick samples. Quantitative analysis of magnetization direction has been performed more easily than with conventional methods. Domain observation of the surface of three-dimensional samples has been confirmed to be possible. One of the drawbacks, a long image acquisition time, has been eased by combining highspeed image-signal processing with high speed scanning, although at the cost of image quality. By using spin SEM, the magnetic structure of a 180 degrees surface Neel wall, magnetic thin films, multilayered films, magnetic discs, etc., have been investigated.

Investigation of spin-polarized carrier injection effect in|YBa2Cu3O7/SrTiO3/La0.67/Sr0.33MnO3 and YBa2Cu3O7/La0.67Sr0.33MnO3 heterostructures

2001 ◽  
Vol 11 (PR11) ◽  
pp. Pr11-53-Pr11-57
Author(s):  
B. Vengalis ◽  
V. Plausinaitiene ◽  
A. Abrutis ◽  
Z. Saltyte ◽  
R. Butkute ◽  
...  
Keyword(s):  
Carrier Injection ◽  
Spin Polarized ◽  
Injection Effect

OPTICAL TRANSITIONS BETWEEN SPIN-POLARIZED BANDS IN MAGNETIC CHROMIUM SPINELS

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-932-C1-933 ◽  
Author(s):  
H. W. LEHMANN ◽  
G. HARBEKE ◽  
H. PINCH
Keyword(s):  
Optical Transitions ◽  
Spin Polarized

SURFACE AND THIN FILM MAGNETISM WITH SPIN POLARIZED ELECTRONS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-9-C8-16 ◽  
Author(s):  
H. C. Siegmann ◽  
D. Mauri ◽  
D. Scholl ◽  
E. Kay
Keyword(s):  
Thin Film ◽  
Polarized Electrons ◽  
Spin Polarized ◽  
Thin Film Magnetism

Implementation of Regulation of The Minister of Kominfo Number 20 2016 in Disdukcapil Sleman, Temanggung, and Gianyar District

2020 ◽  
Vol 24 (1) ◽  
Author(s):  
Nfn Darmanto ◽  
Nur Zaini
Keyword(s):  
Personal Data ◽  
Electronic Systems ◽  
Case Study Method ◽  
Literature Study ◽  
Civil Registration ◽  
Edwards Model ◽  
District Government ◽  
The Government ◽  
Study Techniques

AbstrakPenelitian ini dilatarbelakangi oleh menguatnya wacana mengenai pentingnya perlindungan data pribadi  dan terbitnya Peraturan Menteri Komunikasi dan Informatika Nomor 20 Tahun 2016 tentang Perlindungan Data Pribadi dalam Sistem Elektronik. Adapun tujuan penelitian adalah untuk mengetahui kinerja implementasi Peraturan Menteri tersebut di lingkungan Pemerintah Kabupaten. Penelitian  dilakukan di Dinas Kependudukan dan Pencatatan Sipil pada Pemerintah Kabupaten Gianyar, Temanggung, dan Sleman dengan menggunakan metode studi kasus, sedangkan pengum­pu­lan data menggunakan teknik studi pustaka, wawancara, dan observasi. Pembahasan dilakukan dengan menggunakan konsep implemen­tasi model Edwards yang melihat implementasi berdasarkan variabel komunikasi, sumber-sumber, kecenderungan-kecenderu­ngan, dan struk­tur birokrasi. Hasil penelitian menunjuk­kan bahwa penyelenggaraan administrasi kependudukan yang di dalamnya termasuk perlindungan data pribadi oleh Dinas Kependudukan dan Pencatatan Sipil merujuk pada Peraturan Menteri Dalam Negeri Nomor 61 Tahun 2015, sedangkan Peraturan Menteri Komunikasi dan Informatika Nomor 20 tahun 2016 sama sekali belum mereka ketahui. AbstractThis research is motivated by the strengthening of discourse regarding the importance of protecting personal data and the issuance of Minister of Communication and Information Regulation No. 20 of 2016 concerning Protection of Personal Data in Electronic Systems. The research objective is to determine the performance of the implementation of the Ministerial Regulation within the District Government. The study was conducted at the Department of Population and Civil Registration at the Government of the Regency of Gianyar, Temanggung, and Sleman by using a case study method, while data collection using literature study techniques, interviews, and observations. The discussion was carried out using the concept of implementation of Edwards model that looked at implementation based on communication variables, sources, trends, and bureaucratic structure. The results showed that the administration of population administration which included the protection of personal data by the Population and Civil Registry Office referred to the Minister of Home Affairs Regulation No. 61 of 2015, while the Minister of Communication and Information Regulation No. 20 of 2016 was completely unknown to them.   

Magnetoexcitons in two-dimensional electronic systems

2015 ◽  
Vol 185 (4) ◽  
pp. 337-352
Author(s):  
Veronika E. Bisti ◽  
Aleksandr B. Van'kov ◽  
Andrei S. Zhuravlev ◽  
Leonid V. Kulik
Keyword(s):  
Electronic Systems ◽  
Two Dimensional
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