Close this search box.

We are creating some awesome events for you. Kindly bear with us.

Single-Element Ferroelectricity: the Future of Data Storage and Electronic Sensors 

Physicists at the National University of Singapore (NUS) have discovered a new type of ferroelectricity in a single-element bismuth monolayer that can generate regular and reversible dipole moments for future applications such as nonvolatile storage and electronic sensors.

The phenomenon of certain materials exhibiting spontaneous electric polarisation that can be reversed by applying an external electric field is known as ferroelectricity, and the ferroelectric materials are characterised by the absence of a symmetry centre in their crystal structure.

Ferroelectric materials have sparked extensive research interest due to their potential applications in data storage. Also, their piezoelectric, thermoelectric, and nonlinear optical capabilities have been intensively researched in fields like renewable energy, micro-electro-mechanical systems, and optical devices.

Two-dimensional (2D) ferroelectric materials have emerged as a new challenge in the field of neuromorphic synaptic devices in recent years, owing to their low dimensionality. Yet, due to the scarcity of accessible materials, the development of 2D ferroelectric materials remains hampered.

Ferroelectricity is most typically found in compounds with many constituent elements, where electron gain and loss between the constituents encourage the development of positive and negative ions in the crystal. Regular atom distortion or charge ordering between sublattices causes the central symmetry to be broken, facilitating the creation of ferroelectric polarisation.

A research team led by Professor Andrew Wee of NUS’s Department of Physics recently discovered the single-element ferroelectric state in 2D black phosphorus-like bismuth (BP-Bi), upending the previously described standard concept of ferroelectricity.

Single-element ionicity, single-element in-plane polarisation, and single-element ferroelectricity were all experimentally proven in the bismuth monolayer for the first time. This discovery challenges the notion that ionic polarisation arises solely in compounds containing cations and anions and thus broadens the possibility of future ferroelectricity research.

This work is being done in partnership with Professor Lan Chen of the Chinese Academy of Sciences’ Institute of Physics and Professor Yunhao Lu of Zhejiang University’s School of Physics.

In comparison to magnetism, ferroelectricity is advantageous since it may be controlled solely by an electric field. As a result, it is more appropriate for inclusion in integrated circuit devices. Several investigations have discovered that by linking ferroelectricity with these qualities, it is feasible to influence other material attributes.

The bending degree of the atomic structure in BP-Bi governs the ferroelectric polarisation while also controlling the basic band structure. As a result, the electrical structure and ferroelectric polarisation become interlocked. By ferroelectric distortion, this novel type of ferroelectricity offers a promising technique to control the electronic structure of materials by an external electric field.

Lead author Dr Jian Gou said that additional studies have also demonstrated that BP-Bi shows topologically nontrivial states at a particular buckling height, providing a potential prospect for tuning topological states through an electric field.

In actuality, the fundamental optical and electrical properties of materials are significantly influenced by the polarisation features. The study of the fundamental physical characteristics of simple substances gains a fresh perspective with the discovery of single-element ferroelectric polarisation.

The researchers believe that single-element ferroelectricity in BP-Bi would introduce a new perspective to the study and design of novel ferroelectric materials and inspire new physics of elemental materials in the future. This would challenge the conventional wisdom that ionic polarisation only occurs in compounds.


Qlik’s vision is a data-literate world, where everyone can use data and analytics to improve decision-making and solve their most challenging problems. A private company, Qlik offers real-time data integration and analytics solutions, powered by Qlik Cloud, to close the gaps between data, insights and action. By transforming data into Active Intelligence, businesses can drive better decisions, improve revenue and profitability, and optimize customer relationships. Qlik serves more than 38,000 active customers in over 100 countries.


As a Titanium Black Partner of Dell Technologies, CTC Global Singapore boasts unparalleled access to resources.

Established in 1972, we bring 52 years of experience to the table, solidifying our position as a leading IT solutions provider in Singapore. With over 300 qualified IT professionals, we are dedicated to delivering integrated solutions that empower your organization in key areas such as Automation & AI, Cyber Security, App Modernization & Data Analytics, Enterprise Cloud Infrastructure, Workplace Modernization and Professional Services.

Renowned for our consulting expertise and delivering expert IT solutions, CTC Global Singapore has become the preferred IT outsourcing partner for businesses across Singapore.


Planview has one mission: to build the future of connected work. Our solutions enable organizations to connect the business from ideas to impact, empowering companies to accelerate the achievement of what matters most. Planview’s full spectrum of Portfolio Management and Work Management solutions creates an organizational focus on the strategic outcomes that matter and empowers teams to deliver their best work, no matter how they work. The comprehensive Planview platform and enterprise success model enables customers to deliver innovative, competitive products, services, and customer experiences. Headquartered in Austin, Texas, with locations around the world, Planview has more than 1,300 employees supporting 4,500 customers and 2.6 million users worldwide. For more information, visit


SIRIM is a premier industrial research and technology organisation in Malaysia, wholly-owned by the Minister​ of Finance Incorporated. With over forty years of experience and expertise, SIRIM is mandated as the machinery for research and technology development, and the national champion of quality. SIRIM has always played a major role in the development of the country’s private sector. By tapping into our expertise and knowledge base, we focus on developing new technologies and improvements in the manufacturing, technology and services sectors. We nurture Small Medium Enterprises (SME) growth with solutions for technology penetration and upgrading, making it an ideal technology partner for SMEs.


HashiCorp provides infrastructure automation software for multi-cloud environments, enabling enterprises to unlock a common cloud operating model to provision, secure, connect, and run any application on any infrastructure. HashiCorp tools allow organizations to deliver applications faster by helping enterprises transition from manual processes and ITIL practices to self-service automation and DevOps practices. 


IBM is a leading global hybrid cloud and AI, and consulting services provider, helping clients in more than 175 countries capitalize on insights from their data, streamline business processes, reduce costs and gain the competitive edge in their industries. Nearly 3,800 government and corporate entities in critical infrastructure areas such as financial services, telecommunications and healthcare rely on IBM’s hybrid cloud platform and Red Hat OpenShift to affect their digital transformations quickly, efficiently, and securely. IBM’s breakthrough innovations in AI, quantum computing, industry-specific cloud solutions and business services deliver open and flexible options to our clients. All of this is backed by IBM’s legendary commitment to trust, transparency, responsibility, inclusivity, and service. For more information, visit