Question:  Peter Schattschneider is a cientist who has specialized knowledge in the exploration of the interactions of matter and energy across what?

full_context: Document 1: Walter Dröscher: Walter Dröscher is a physicist who worked at the Austrian Patent office (Österreichisches Patentamt) . Now in retirement, he devotes most of his time to developing Heim Theory. It was in 1980 that Dröscher was introduced to the reclusive German physicist Burkhard Heim, thereby becoming one of the few physicists to collaborate with Heim.
Document 2: Low-energy electron microscopy: Low-energy electron microscopy, or LEEM, is an analytical surface science technique invented by Ernst Bauer in 1962, however, not fully developed (by Ernst Bauer and Wolfgang Telieps) until 1985. LEEM is a technique used by surface scientists to image atomically clean surfaces, atom-surface interactions, and thin (crystalline) films. In LEEM, high-energy electrons (15-20 keV) are emitted from an electron gun, focused using a set of condenser optics, and sent through a magnetic beam deflector (usually 60˚ or 90˚). The “fast” electrons travel through an objective lens and begin decelerating to low energies (1-100 eV) near the sample surface because the sample is held at a potential near that of the gun. The low-energy electrons are now termed “surface-sensitive” and the near-surface sampling depth can be varied by tuning the energy of the incident electrons (difference between the sample and gun potentials minus the work functions of the sample and system). The low-energy elastically backscattered electrons travel back through the objective lens, reaccelerate to the gun voltage (because the objective lens is grounded), and pass through the beam separator again. However, now the electrons travel away from the condenser optics and into the projector lenses. Imaging of the back focal plane of the objective lens into the object plane of the projector lens (using an intermediate lens) produces a diffraction pattern (low-energy electron diffraction, LEED) at the imaging plane and recorded in a number of different ways. The intensity distribution of the diffraction pattern will depend on the periodicity at the sample surface and is a direct result of the wave nature of the electrons. One can produce individual images of the diffraction pattern spot intensities by turning off the intermediate lens and inserting a contrast aperture in the back focal plane of the objective lens (or, in state-of-the-art instruments, in the center of the separator, as chosen by the excitation of the objective lens), thus allowing for real-time observations of dynamic processes at surfaces. Such phenomena include (but are not limited to): tomography, phase transitions, adsorption, reaction, segregation, thin film growth, etching, strain relief, sublimation, and magnetic microstructure. These investigations are only possible because of the accessibility of the sample; allowing for a wide variety of in situ studies over a wide temperature range.
Document 3: Materials science: The interdisciplinary field of materials science, also commonly termed materials science and engineering, involves the discovery and design of new materials, with an emphasis on solids. The intellectual origins of materials science stem from the Enlightenment, when researchers began to use analytical thinking from chemistry, physics, and engineering to understand ancient, phenomenological observations in metallurgy and mineralogy. Materials science still incorporates elements of physics, chemistry, and engineering. As such, the field was long considered by academic institutions as a sub-field of these related fields. Beginning in the 1940s, materials science began to be more widely recognized as a specific and distinct field of science and engineering, and major technical universities around the world created dedicated schools of the study.
Document 4: Physicist: A physicist is a scientist who has specialized knowledge in the field of physics, the exploration of the interactions of matter and energy across the physical universe.
Document 5: Otto Scherzer: Otto Scherzer (9 March 1909 – 15 November 1982) was a German theoretical physicist who made contributions to electron microscopy.
Document 6: Pseudophysics: Pseudophysics is a pseudoscientific practice using the language of physics or discussing issues related to or pertinent to physics to promote ideas which are either incoherent or contradictory to known physics (experimental phenomenology). According to physicists, skeptics, and science writers, pseudophysics tends to be promoted by so-called "cranks", whose ideas lack peer review, lack falsifiable predictions, and/or blatantly contradict scientific facts and experimental results. Mathematical physicist John C. Baez famously invented a crackpot index to give an idea of what sort of claims and rhetoric were commonplace among pseudophysics proposals he had come across.
Document 7: Physics World: Physics World is the membership magazine of the Institute of Physics, one of the largest physical societies in the world. It is an international monthly magazine covering all areas of physics, pure and applied, and is aimed at physicists in research, industry, physics outreach, and education worldwide.
Document 8: Pharmacist: Pharmacists, also known as chemists (Commonwealth English) or druggists (North American and, archaically, Commonwealth English), are healthcare professionals who practice in pharmacy, the field of health sciences focusing on safe and effective medication use. A pharmacist is a member of the health care team directly involved with patient care. Pharmacists undergo university-level education to understand the biochemical mechanisms and actions of drugs, drug uses, therapeutic roles, side effects, potential drug interactions, and monitoring parameters. This is mated to anatomy, physiology, and pathophysiology. Pharmacists interpret and communicate this specialized knowledge to patients, physicians, and other health care providers.
Document 9: Juan Gualterio Roederer: Juan G. Roederer is a professor of physics emeritus at the University of Alaska Fairbanks (UAF). His research fields are space physics, psychoacoustics, science policy and information theory. He conducted pioneering research on solar cosmic rays, on the theory of earth’s radiation belts, neural networks for pitch processing, and currently on the foundations of information theory. He is also an accomplished organist.
Document 10: Georg Stetter: Georg Carl Stetter (23 December 1895 – 14 July 1988) was an Austrian-German nuclear physicist. Stetter was Director of the Second Physics Institute of the University of Vienna. He was a principal member of the German nuclear energy project, also known as the Uranium Club. In the latter years of World War II, he was also the Director of the Institute for Neutron Research. After the war, he was dismissed from his university positions, and he then became involved in dust protection research. After his dismissal was overturned, he became Director of the First Physics Institute of the University of Vienna, and he began research on aerosols. In 1962, Stetter became a full Member of the Austrian Academy of Sciences. In that same year, the Academy established their Commission for Clean Air, and Stetter served as its chairman until 1985.
Document 11: Outline of physical science: Physical science is a branch of natural science that studies non-living systems, in contrast to life science. It in turn has many branches, each referred to as a "physical science", together called the "physical sciences". However, the term "physical" creates an unintended, somewhat arbitrary distinction, since many branches of physical science also study biological phenomena and branches of chemistry such as organic chemistry.
Document 12: Peter Schattschneider: Peter Schattschneider (a.o. Univ.Prof. Dipl.-Ing. Mag.rer.nat. Dr.techn.)(born 1950 in Vienna) is an Austrian Physicist and Science-Fiction-Writer, currently a Professor at the Institute of Solid State Physics and a staff member of the USTEM special unit of the Vienna University of Technology. His research focuses on electron microscopy, specifically on Electron energy loss spectroscopy and the inelastic interactions between electrons and matter. He is also interested in the history of physics, the science in Science Fiction, and the role of science in society. His group was responsible for the discovery of Electron magnetic circular dichroism in 2006.
Document 13: Biologist: A biologist, is a scientist who has specialized knowledge in the field of biology, the scientific study of life. Biologists involved in fundamental research attempt to explore and further explain the underlying mechanisms that govern the functioning of living matter. Biologists involved in applied research attempt to develop or improve more specific processes and understanding, in fields such as medicine, industry and agriculture.
Document 14: Physical cosmology: Physical cosmology is the study of the largest-scale structures and dynamics of the Universe and is concerned with fundamental questions about its origin, structure, evolution, and ultimate fate. Cosmology as a science originated with the Copernican principle, which implies that celestial bodies obey identical physical laws to those on Earth, and Newtonian mechanics, which first allowed us to understand those physical laws. Physical cosmology, as it is now understood, began with the development in 1915 of Albert Einstein's general theory of relativity, followed by major observational discoveries in the 1920s: first, Edwin Hubble discovered that the universe contains a huge number of external galaxies beyond our own Milky Way; then, work by Vesto Slipher and others showed that the universe is expanding. These advances made it possible to speculate about the origin of the universe, and allowed the establishment of the Big Bang Theory, by Georges Lemaitre, as the leading cosmological model. A few researchers still advocate a handful of alternative cosmologies; however, most cosmologists agree that the Big Bang theory explains the observations better.
Document 15: Stephen Pearton: Stephen Pearton is an American materials scientist and engineer and Distinguished Professor at University of Florida. Pearton's work focuses on the use of advanced materials in areas such as laser diodes and nanomaterial applications and similar applications. He is a recipient of the J.J. Ebers Award from the Institute of Electrical and Electronics Engineers, and the David Adler Lectureship from the American Physical Society. He is also a Fellow of multiple professional or academic societies, including the Institute of Electrical and Electronics Engineers, the American Physical Society, the Materials Research Society, and the American Vacuum Society.
ground_truth: the physical universe