Home > Press > Electrochemical etching down to one-monolayer towards high-Tc superconductivity: A new route for exploration of nontrivial physical phenomena at two-dimensional materials
 |
| (Left) Device structure of electric-double-layer transistor with FeSe channel deposited on oxide substrate. (Right) One-monolayer FeSe is realized by electrochemical etching where Fe and Se ions are dissolved into ionic liquid. CREDIT: Junichi Shiogai |
Abstract:
Iron selenide (FeSe) is an attracting superconducting material since the superconducting transition temperature (Tc) is enhanced from 8 K in bulk form toward 65 K in one-monolayer form.
Electrochemical etching down to one-monolayer towards high-Tc superconductivity: A new route for exploration of nontrivial physical phenomena at two-dimensional materials
Sendai, Japan | Posted on November 4th, 2015However, systematic thickness dependence of electrical measurement has been difficult to address.
A team of researchers at Tohoku University's Institute for Materials Research (IMR), has realized layer-by-layer etching in superconducting FeSe films down to approximately one-monolayer about 0.6 nm using classical electrochemical reaction in electric-double-layer transistor configuration.
As the thickness of the films becomes thin, the superconducting transition temperature (Tc) is increased from bulk value (8 K) to about 40 K. In addition, the research group unveils that by combining with an electrostatic charging effect, the high-Tc transition can be induced in 10-nm thick condition (20 monolayers), which had been limited in one/two-monolayers so far.
The development of this etching technique will pave the way for the exploration of nontrivial physical phenomena in atomically thin two-dimensional films. This had previously been difficult to address by conventional methods.
This work was published in Nature Physics online on Nov 2, 2015.
###
Publication Information
Authors: J. Shiogai, Y. Ito, T. Mitsuhashi, T. Nojima and A. Tsukazaki
Title: Electric-field-induced superconductivity in electrochemically etched ultrathin FeSe films on SrTiO3 and MgO
Journal: Nature Physics
####
For more information, please click here
Contacts:
Junichi Shiogai
Copyright © Tohoku University
If you have a comment, please Contact us.Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
Bookmark:
| Related News Press |
News and information
Tumor microenvironment dynamics: the regulatory influence of long non-coding RNAs April 25th, 2025
Ultrafast plasmon-enhanced magnetic bit switching at the nanoscale April 25th, 2025
Next-generation drug delivery innovation! DGIST develops precision therapeutics using exosomes April 25th, 2025
Quantum interference in molecule-surface collisions February 28th, 2025
Physics
Physicists unlock the secret of elusive quantum negative entanglement entropy using simple classical hardware August 16th, 2024
New method cracked for high-capacity, secure quantum communication July 5th, 2024
Superconductivity
Researchers observe “locked” electron pairs in a superconductor cuprate August 16th, 2024
Optically trapped quantum droplets of light can bind together to form macroscopic complexes March 8th, 2024
'Sudden death' of quantum fluctuations defies current theories of superconductivity: Study challenges the conventional wisdom of superconducting quantum transitions January 12th, 2024
Thin films
Utilizing palladium for addressing contact issues of buried oxide thin film transistors April 5th, 2024
Understanding the mechanism of non-uniform formation of diamond film on tools: Paving the way to a dry process with less environmental impact March 24th, 2023
Discoveries
Tumor microenvironment dynamics: the regulatory influence of long non-coding RNAs April 25th, 2025
Ultrafast plasmon-enhanced magnetic bit switching at the nanoscale April 25th, 2025
Next-generation drug delivery innovation! DGIST develops precision therapeutics using exosomes April 25th, 2025
Rice researchers harness gravity to create low-cost device for rapid cell analysis February 28th, 2025
Announcements
Tumor microenvironment dynamics: the regulatory influence of long non-coding RNAs April 25th, 2025
Ultrafast plasmon-enhanced magnetic bit switching at the nanoscale April 25th, 2025
Next-generation drug delivery innovation! DGIST develops precision therapeutics using exosomes April 25th, 2025
Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters
Tumor microenvironment dynamics: the regulatory influence of long non-coding RNAs April 25th, 2025
Ultrafast plasmon-enhanced magnetic bit switching at the nanoscale April 25th, 2025
Next-generation drug delivery innovation! DGIST develops precision therapeutics using exosomes April 25th, 2025
 |
||
 |
||
| The latest news from around the world, FREE | ||
 |
||
|
|
||
| Premium Products | ||
 |
||
|
Only the news you want to read!
Learn More |
||
 |
||
|
Full-service, expert consulting
Learn More |
||
|
|
||