• HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
Wednesday, August 6, 2025
BIOENGINEER.ORG
No Result
View All Result
  • Login
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
No Result
View All Result
Bioengineer.org
No Result
View All Result
Home NEWS Science News

Curved nanochannels allow independent tuning of charge and spin currents

Bioengineer by Bioengineer
September 30, 2019
in Science News
Reading Time: 3 mins read
0
Share on FacebookShare on TwitterShare on LinkedinShare on RedditShare on Telegram

IMAGE

Credit: Das et al, Nano Letters

To increase the efficiency of microchips, 3D structures are now being investigated. However, spintronic components, which rely on electron spin rather than charge, are always flat. To investigate how to connect these to 3D electronics, University of Groningen physicist Dr. Kumar Sourav Das created curved spin transport channels. Together with his colleagues, he discovered that this new geometry makes it possible to independently tune charge and spin currents. The results were published online by the journal Nano Letters on 13 September 2019.

Das started with two main questions: how to tune spin current using geometry, and how to create spin transport in a 3D nanostructure. Electron spin is a quantum mechanical property, a magnetic moment that can be used to transfer or store information. Spin is already used in memory storage, and could also be used in logic circuits.

Curved architecture

‘So far, most spintronic devices have been based on a flat structure. We wanted to find out how the spin currents behave in a curved channel’, says Das. Using silicon oxide substrates with trenches created by an ion beam, designed at the HZDR in Dresden by Dr. Denys Makarov, Das grew aluminum nanochannels that crossed the trenches. In this curved architecture, the thickness of the aluminum varies at nanoscale dimensions, shorter than the spin relaxation length.

Das used different sized trenches and measured both spin resistance and charge currents. ‘What we discovered is that variations in the trench size affect spin and charge transport in the channel differently’, Das explains. ‘We were therefore able to independently tune both spin and charge currents based on the channel geometry.’

Novel functionalities

His colleague Dr. Carmine Ortix from Utrecht University created a theoretical model describing this phenomenon. ‘Our theory clearly demonstrates that it is possible to independently tune the spin and charge characteristics using the shape of the materials alone. This possibility overcomes the existing technological hurdles for the applicability of spintronics in modern electronics’, says Dr. Ortix. ‘Extending low-dimensional structures into the three-dimensional space can provide the means to modify conventional functionalities or even launch completely novel functionalities by suitably tailoring the shape of real materials.’

‘This discovery is important because it allows us to tune spintronic components to match both the spin current and the charge current of electronic circuits’, says Das. ‘It enables the efficient integration of spin injectors and detectors or spin transistors into modern 3D circuitry.’ This could help to create more energy-efficient electronics, as spintronics is an attractive way of creating low-power devices. ‘And we can now use our model to purpose-design channels.’

###

EU project

The study was performed as part of the FET European project ‘Curved nanomembranes for Topological Quantum Computation’. The experiments were initiated and supervised by Dr. Ivan Vera-Marun at the University of Manchester. Dr. Kumar Sourav Das performed the experiments as a part of his Ph.D. project in the Physics of Nanodevices group led by Prof. Bart van Wees. This group is part of the Zernike Institute for Advanced Materials at the University of Groningen. The theoretical model was created by Dr. Carmine Ortix at Utrecht University and colleagues from Italy.

Reference: Kumar Sourav Das, Denys Makarov. Paola Gentile. Mario Cuoco, Bart J. van Wees, Carmine Ortix and Ivan J. Vera-Marun: Independent Geometrical Control of Spin and Charge Resistances in Curved Spintronics. Nano Letters 13 September 20119

Media Contact
Rene Fransen
[email protected]

Original Source

https://www.rug.nl/sciencelinx/nieuws/2019/09/20190930_das

Related Journal Article

http://dx.doi.org/10.1021/acs.nanolett.9b01994

Tags: Chemistry/Physics/Materials SciencesComputer ScienceElectrical Engineering/ElectronicsHardwareMaterialsNanotechnology/MicromachinesSuperconductors/Semiconductors
Share12Tweet8Share2ShareShareShare2

Related Posts

Forensic Age Estimation in Southwestern Chinese Adolescents

Forensic Age Estimation in Southwestern Chinese Adolescents

August 6, 2025
blank

Pasteurella multocida Cap B: Virulence and Cross Protection

August 6, 2025

Mexican Mental Health Pros on Tech for Substance Use

August 6, 2025

Superoxide Dismutase in Echinococcus and Buffalo Liver

August 6, 2025
Please login to join discussion

POPULAR NEWS

  • blank

    Neuropsychiatric Risks Linked to COVID-19 Revealed

    74 shares
    Share 30 Tweet 19
  • Overlooked Dangers: Debunking Common Myths About Skin Cancer Risk in the U.S.

    61 shares
    Share 24 Tweet 15
  • Predicting Colorectal Cancer Using Lifestyle Factors

    46 shares
    Share 18 Tweet 12
  • Dr. Miriam Merad Honored with French Knighthood for Groundbreaking Contributions to Science and Medicine

    47 shares
    Share 19 Tweet 12

About

We bring you the latest biotechnology news from best research centers and universities around the world. Check our website.

Follow us

Recent News

Forensic Age Estimation in Southwestern Chinese Adolescents

Pasteurella multocida Cap B: Virulence and Cross Protection

Mexican Mental Health Pros on Tech for Substance Use

  • Contact Us

Bioengineer.org © Copyright 2023 All Rights Reserved.

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
No Result
View All Result
  • Homepages
    • Home Page 1
    • Home Page 2
  • News
  • National
  • Business
  • Health
  • Lifestyle
  • Science

Bioengineer.org © Copyright 2023 All Rights Reserved.