Division of Condensed Matter Physics

Division of Condensed Matter Physics. The Division of Condensed Matter Physics (DCMP) is a unit of the American Physical Society dedicated to advancing the understanding of the physical properties of solids, liquids, and other complex, condensed phases of matter. It serves as a primary professional forum for physicists working in this vast field, organizing conferences, recognizing achievements through awards, and fostering communication and collaboration among researchers. The division's activities encompass both fundamental science and the exploration of materials with novel electronic, magnetic, and optical properties that drive modern technology.

● Overview and Scope

The scope of the division is exceptionally broad, mirroring the expansive nature of condensed matter physics itself. It focuses on the collective behavior of vast assemblies of atoms and molecules, investigating how quantum mechanics and statistical mechanics give rise to macroscopic phenomena. This includes the study of ordered systems like crystals and amorphous solids, as well as complex fluids, soft matter, and biological physics. The division supports research that bridges traditional boundaries, often intersecting with materials science, chemistry, electrical engineering, and nanotechnology. Its membership includes thousands of physicists from academic institutions, national laboratories like Lawrence Berkeley National Laboratory and Argonne National Laboratory, and industrial research centers worldwide.

● Fundamental Concepts and Phenomena

Research within the division's purview is built upon foundational concepts such as symmetry breaking, phase transitions, and the emergence of quasiparticle excitations. Key phenomena of intense study include superconductivity, where electrical resistance vanishes below a critical temperature, as exemplified in materials like YBCO and MgB2. The quantum Hall effect, discovered by Klaus von Klitzing, and the fractional quantum Hall effect reveal topologically ordered states of matter. Other central themes are magnetism, including ferromagnetism and antiferromagnetism, semiconductor physics which underpins the transistor, and the unique electronic properties of graphene and other two-dimensional materials. The study of strongly correlated electron systems, such as those exhibiting high-temperature superconductivity or heavy fermion behavior, remains a major frontier.

● Major Subfields and Research Areas

The division encompasses numerous active subfields. Soft condensed matter physics investigates colloids, polymers, liquid crystals, and granular materials. Mesoscopic physics explores systems intermediate in size between the atomic and macroscopic scales, where quantum coherence can be observed. The field of spintronics aims to utilize electron spin rather than charge for information processing. Topological insulators, materials that are insulating in their bulk but conduct electricity on their surface, represent a rapidly growing area pioneered by theorists like Charles L. Kane and experimentalists. Other vital areas include multiferroic materials, complex oxides, photonic crystals, and the physics of quantum information and quantum computation as realized in solid-state systems.

● Experimental and Theoretical Techniques

Advancing the field relies on a sophisticated arsenal of techniques. Experimentally, probes include X-ray diffraction and neutron scattering at facilities like the Spallation Neutron Source to determine atomic structure. Spectroscopic methods such as angle-resolved photoemission spectroscopy (ARPES), scanning tunneling microscopy (STM) pioneered by Gerd Binnig and Heinrich Rohrer, and various forms of magnetic resonance are essential. Molecular beam epitaxy allows for the atomically precise growth of materials. Theoretically, approaches range from analytical methods in quantum field theory and renormalization group analysis to large-scale computational simulations using density functional theory and quantum Monte Carlo methods run on supercomputers at institutions like the National Center for Supercomputing Applications.

● Historical Development and Key Discoveries

The formal establishment of the division in 1978 recognized the explosive growth of condensed matter physics following seminal 20th-century breakthroughs. The development of quantum mechanics by figures like Erwin Schrödinger and Werner Heisenberg provided the essential framework. The Bardeen–Cooper–Schrieffer theory of superconductivity by John Bardeen, Leon Cooper, and Robert Schrieffer was a landmark. The invention of the transistor at Bell Labs by John Bardeen, Walter Brattain, and William Shockley revolutionized technology. Later, the discovery of the quantum Hall effect and high-temperature superconductivity in cuprates by J. Georg Bednorz and K. Alex Müller opened new chapters. The more recent isolation of graphene by Andre Geim and Konstantin Novoselov further energized the field.

● Applications and Technological Impact

The research championed by the division is the bedrock of modern technology. Semiconductor physics led to the integrated circuit and the microprocessor, fueling the digital revolution. Discoveries in magnetoresistance enabled high-capacity hard disk drives. Liquid crystal display technology stems from soft matter research. Advances in photovoltaic materials are critical for solar energy. The pursuit of room-temperature superconductivity promises lossless power grids and advanced maglev trains. Nanomaterials developed from condensed matter principles are used in medical diagnostics, drug delivery, and lightweight composites. The ongoing exploration of topological quantum computing platforms could lead to a new paradigm in information processing. Category:American Physical Society Category:Condensed matter physics organizations Category:Scientific societies based in the United States