Single-Spin Dirac Fermion and Chern Insulator Based on Simple Oxides

Nano Letters
Tianyi CaiChang-De Gong

Abstract

It is highly desirable to combine recent advances in the topological quantum phases with technologically relevant materials. Chromium dioxide (CrO2) is a half-metallic material, widely used in high-end data storage applications. Using first-principles calculations, we show that a novel class of half semimetallic Dirac electronic phase emerges at the interface CrO2 with TiO2 in both thin film and superlattice configurations, with four spin-polarized Dirac points in momentum-space (k-space) band structure. When the spin and orbital degrees of freedom are allowed to couple, the CrO2/TiO2 superlattice becomes a Chern insulator without external fields or additional doping. With topological gaps equivalent to 43 K and a Chern number ±2, the ensuing quantization of Hall conductance to ±2e(2)/h will enable potential development of these highly industrialized oxides for applications in topologically high fidelity data storage and energy-efficient electronic and spintronic devices.

References

Aug 15, 1995·Physical Review. B, Condensed Matter·A I LiechtensteinJ Zaanen
Oct 15, 1996·Physical Review. B, Condensed Matter·G Kresse, J Furthmüller
Jan 15, 1993·Physical Review. B, Condensed Matter·R D King-Smith, D Vanderbilt
Dec 14, 1987·Physical Review Letters·K P KämperR Ruf
Oct 28, 1996·Physical Review Letters·J P PerdewM Ernzerhof
Mar 3, 2007·Nature Materials·A K Geim, K S Novoselov
Jun 13, 2009·Physical Review Letters·Victor Pardo, Warren E Pickett
Oct 27, 2011·Physical Review Letters·A A Burkov, Leon Balents
Nov 24, 2011·Physical Review Letters·Gang XuZhong Fang
Jan 25, 2012·Nature Materials·J ChakhalianJ Rondinelli
Jan 25, 2012·Nature Materials·H Y HwangY Tokura
Jun 8, 2012·Nature Communications·Ting CaoJi Feng
Feb 26, 2013·Proceedings of the National Academy of Sciences of the United States of America·Xiao LiJi Feng
Jan 25, 2013·Physical Review Letters·Fan ZhangE J Mele

❮ Previous
Next ❯

Citations

May 17, 2019·Physical Chemistry Chemical Physics : PCCP·Ping Li
Dec 17, 2019·Physical Chemistry Chemical Physics : PCCP·Ping Li, Tian-Yi Cai
Jun 13, 2020·Small·Zengji YueXiaolin Wang
Aug 7, 2020·Physical Chemistry Chemical Physics : PCCP·Xiaohui Deng, Zhenyu Li
Mar 12, 2019·Physical Chemistry Chemical Physics : PCCP·Ping Li
Jul 9, 2020·Proceedings of the National Academy of Sciences of the United States of America·Xiao LiQian Niu
May 14, 2016·Reports on Progress in Physics·Yafei RenQian Niu
Mar 7, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·V Damljanović, R Gajić
Nov 20, 2020·Physical Chemistry Chemical Physics : PCCP·Xin-Yang LiChang-Wen Zhang
Sep 30, 2017·Nano Letters·Ping LiAllan H MacDonald
Dec 31, 2019·The Journal of Physical Chemistry Letters·Yang HuShi-Shen Yan

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.