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Condensed matter physics is the field of physics that deals with the macroscopic and microscopic physical properties of matter, especially the solid and liquid phases which arise from electromagnetic forces between atoms. More generally, the subject deals with condensed phases of matter: systems of many constituents with strong interactions among them. More exotic condensed phases include the superconducting phase exhibited by certain materials at extremely low cryogenic temperature, the ferromagnetic and antiferromagnetic phases of spins on crystal lattices of atoms, and the Bose–Einstein condensate found in ultracold atomic systems. Condensed matter physicists seek to understand the behavior of these phases by experiments to measure various material properties, and by applying the physical laws of quantum mechanics, electromagnetism, statistical mechanics, and other physics theories to develop mathematical models.
Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic fields are expelled from the material. Any material exhibiting these properties is a superconductor. Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered, even down to near absolute zero, a superconductor has a characteristic critical temperature below which the resistance drops abruptly to zero. An electric current through a loop of superconducting wire can persist indefinitely with no power source.
High-temperature superconductors are defined as materials with critical temperature above 77 K, the boiling point of liquid nitrogen. They are only "high-temperature" relative to previously known superconductors, which function at even colder temperatures, close to absolute zero. The "high temperatures" are still far below ambient, and therefore require cooling. The first break through of high-temperature superconductor was discovered in 1986 by IBM researchers Georg Bednorz and K. Alex Müller. Although the critical temperature is around 35.1 K, this new type of superconductor was readily modified by Ching-Wu Chu to make the first high-temperature superconductor with critical temperature 93 K. Bednorz and Müller were awarded the Nobel Prize in Physics in 1987 "for their important break-through in the discovery of superconductivity in ceramic materials". Most high-Tc materials are type-II superconductors.
Superconductivity is the phenomenon of certain materials exhibiting zero electrical resistance and the expulsion of magnetic fields below a characteristic temperature. The history of superconductivity began with Dutch physicist Heike Kamerlingh Onnes's discovery of superconductivity in mercury in 1911. Since then, many other superconducting materials have been discovered and the theory of superconductivity has been developed. These subjects remain active areas of study in the field of condensed matter physics.
Jan Zaanen is professor of theoretical physics at Leiden University, the Netherlands. He is best known for his contributions to the understanding of the quantum physics of the electrons in strongly correlated material, and in particular high temperature superconductivity. Zaanen's areas of interest are in the search for novel forms of collective quantum phenomena realized in systems build from mundane constituents like electrons, spins, and atoms.
Iron-based superconductors (FeSC) are iron-containing chemical compounds whose superconducting properties were discovered in 2006. In 2008, led by recently discovered iron pnictide compounds, they were in the first stages of experimentation and implementation..
Superstripes is a generic name for a phase with spatial broken symmetry that favors the onset of superconducting or superfluid quantum order. This scenario emerged in the 1990s when non-homogeneous metallic heterostructures at the atomic limit with a broken spatial symmetry have been found to favor superconductivity. Before a broken spatial symmetry was expected to compete and suppress the superconducting order. The driving mechanism for the amplification of the superconductivity critical temperature in superstripes matter has been proposed to be the shape resonance in the energy gap parameters ∆n that is a type of Fano resonance for coexisting condensates.
Piers Coleman is a British-born theoretical physicist, working in the field of theoretical condensed matter physics. Coleman is professor of physics at Rutgers University in New Jersey and at Royal Holloway, University of London.
In condensed matter physics, quantum oscillations describes a series of related experimental techniques used to map the Fermi surface of a metal in the presence of a strong magnetic field. These techniques are based on the principle of Landau quantization of Fermions moving in a magnetic field. For a gas of free fermions in a strong magnetic field, the energy levels are quantized into bands, called the Landau levels, whose separation is proportional to the strength of the magnetic field. In a quantum oscillation experiment, the external magnetic field is varied, which causes the Landau levels to pass over the Fermi surface, which in turn results in oscillations of the electronic density of states at the Fermi level; this produces oscillations in the many material properties which depend on this, including resistance, Hall resistance, and magnetic susceptibility. Observation of quantum oscillations in a material is considered a signature of Fermi liquid behaviour.
In condensed matter physics, the resonating valence bond theory (RVB) is a theoretical model that attempts to describe high-temperature superconductivity, and in particular the superconductivity in cuprate compounds. It was first proposed by an American physicist P. W. Anderson and Indian theoretical physicist Ganapathy Baskaran in 1987. The theory states that in copper oxide lattices, electrons from neighboring copper atoms interact to form a valence bond, which locks them in place. However, with doping, these electrons can act as mobile Cooper pairs and are able to superconduct. Anderson observed in his 1987 paper that the origins of superconductivity in doped cuprates was in the Mott insulator nature of crystalline copper oxide. RVB builds on the Hubbard and t-J models used in the study of strongly correlated materials.
Samarium hexaboride (SmB6) is an intermediate-valence compound where samarium is present both as Sm2+ and Sm3+ ions at the ratio 3:7. It is a Kondo insulator having a metallic surface state.
Kathryn Ann Moler is an American physicist, and current dean of research at Stanford University. She received her BSc (1988) and Ph.D. (1995) from Stanford University. After working as a visiting scientist at IBM T.J. Watson Research Center in 1995, she held a postdoctoral position at Princeton University from 1995 to 1998. She joined the faculty of Stanford University in 1998, and became an Associate in CIFAR's Superconductivity Program in 2000. She became an associate professor at Stanford in 2002 and is currently a professor of applied physics and of Physics at Stanford. She currently works in the Geballe Laboratory for Advanced Materials (GLAM), and is the director of the Center for Probing the Nanoscale (CPN), a National Science Foundation-funded center where Stanford and IBM scientists continue to improve scanning probe methods for measuring, imaging, and controlling nanoscale phenomena. She lists her scientific interests and main areas of research and experimentation as:
Xue Qikun is a Chinese physicist. He is a professor of Tsinghua University, Beijing. He has done much work in Condensed Matter Physics, especially on superconductors and topological insulators. In 2013, Xue was the first to achieve the quantum anomalous Hall effect (QAHE), an unusual orderly motion of electrons in a conductor, in his laboratory at Tsinghua University. Xue is a member of the Chinese Academy of Sciences, vice president for research of Tsinghua University, and director of State Key Lab of Quantum Physics. In 2016, he was one of the first recipients of the new Chinese Future Science Award for experimental discovery of high-temperature superconductivity at material interfaces and the QAHE. This award has been described as "China's Nobel Prize".
Elihu Abrahams was a theoretical physicist, specializing in condensed matter physics.
Gilbert "Gil" George Lonzarich is a solid-state physicist who works at the Cavendish Laboratory at the University of Cambridge. He is particularly noted for his work on superconducting and magnetic materials.
Thomas Maurice Rice, known professionally as Maurice Rice, is an Irish theoretical physicist specializing in condensed matter physics.
N. Peter Armitage is an American physicist who is currently a Professor of Physics and Astronomy at The Johns Hopkins University. His research centers on understanding material systems which exhibit coherent quantum effects at low temperatures, like superconductors and quantum magnetism. His principal scientific interest is understanding how is it that large ensembles of strongly interacting, but fundamentally simple particles like electrons in solids act collectively to exhibit complex emergent quantum phenomena. He exploits and develops techniques using low frequency microwave and THz range radiation that probe these systems at their natural frequency scales. The material systems of interest require new measurement techniques as their relevant frequencies typically fall between the range of usual optical and electronic methods.
Twistronics is the study of how the angle between layers of two-dimensional materials can change their electrical properties. Materials such as bilayer graphene have been shown to have vastly different electronic behavior, ranging from non-conductive to superconductive, that depends sensitively on the angle between the layers. The term was first introduced by the research group of Efthimios Kaxiras at Harvard University in their theoretical treatment of graphene superlattices.
Amalia Ioana Coldea is a Romanian quantum physicist who is an Associate Professor at the University of Oxford. She was awarded the 2019 Institute of Physics Brian Pippard Prize and the 2011 EuroMagnet Prize.
Allen Marshall Goldman is an American experimental condensed matter physicist, known for his research on electronic transport properties of superconductors and for the eponymous Carlson-Goldman mode involving collective oscillations in superconductors.
References
- 1 2 "Sebastian, Suchitra". Department of Applied Physics. Retrieved 7 October 2017.
- 1 2 "Four Cambridge researchers recognised in the 2022 Breakthrough Prizes". University of Cambridge. 9 September 2021. Retrieved 1 February 2022.
- 1 2 "Cambridge chemists are awarded the biggest prize in science". ITV News. 10 September 2021. Retrieved 1 February 2022.
- ↑ Baker, Monya (31 December 2014). "Hopes for the year ahead". Nature. 517 (7532): 111–3. doi: 10.1038/nj7532-111a . PMID 25568916.
- ↑ "The next big names in physics". www.ft.com. 18 October 2013. Retrieved 22 March 2021.
- ↑ "45 scientists coming to Davos". World Economic Forum. Retrieved 22 March 2021.
- 1 2 3 Spratt, Radha (21 September 2013). "The thrill of discovery". The Hindu. Retrieved 7 October 2017.
- ↑ "Department of Physics, University of Cambridge". www.phy.cam.ac.uk. 31 July 2013. Retrieved 24 May 2021.
- ↑ "The Djinns of Eidgah". Edinburgh Festival. 15 August 2019. Retrieved 22 March 2021.
- ↑ "Bread is for everyone". CAM Digital | University of Cambridge. 9 July 2020. Retrieved 22 March 2021.
- ↑ Levy, Dawn (2 June 2006). "3-D insulator called Han Purple loses a dimension to enter magnetic 'Flatland'". Stanford Report. Retrieved 7 October 2017.
- 1 2 "In search of the superconductor Holy Grail". Horizon: The EU Research & Innovation Magazine. 23 October 2013. Retrieved 7 October 2017.
- ↑ Lewis, Tanya (24 June 2014). "Making Headway in Search for Zero-Resistance Wonder Materials". Live Science. Retrieved 7 October 2017.
- ↑ Borghino, Dario (7 July 2015). "Puzzling material acts as conductor and insulator at the same time". New Atlas. Retrieved 7 October 2017.
- ↑ "2012 Moseley medal and prize". Institute of Physics. Retrieved 7 October 2017.
- ↑ "Philip Leverhulme Prizes 2015" (PDF). The Leverhulme Trust. p. 3. Retrieved 7 October 2017.