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EP2DS
{{Notability, date=March 2019 The International Conference on Electronic Properties of Two-Dimensional Systems (EP2DS), is a biannual event, where over hundred scientists meet for the presentation of new developments on the special field of two-dimensional electron systems in semiconductors. Most transistors in integrated circuits have such a two-dimensional electron system inside, but also the quantum Hall effect was discovered in such a structure. The conference series started 1975 at the Brown University in Providence, Rhode Island, United States. Thnext in the serieswill be held July 31-August 4, 2017 at Penn State. Conference list *EP2DS-1 - Brown University, Providence, Rhode Island, USA (1975) *EP2DS-2 - Berchtesgaden, Germany (1977) *... *EP2DS-10 - Newport, Rhode Island, USA (1993) *EP2DS-11 - Nottingham, England (1995)EP2DS-12- Tokyo, Japan (1997)- Ottawa, Canada (1999)EP2DS-14- Prague, Czech (2001)EP2DS-15- Nara, Japan (2003)EP2DS-16- Albuquerque, New Mexico, USA ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Two-dimensional Electron System
A two-dimensional electron gas (2DEG) is a scientific model in solid-state physics. It is an electron gas that is free to move in two dimensions, but tightly confined in the third. This tight confinement leads to quantized energy levels for motion in the third direction, which can then be ignored for most problems. Thus the electrons appear to be a 2D sheet embedded in a 3D world. The analogous construct of holes is called a two-dimensional hole gas (2DHG), and such systems have many useful and interesting properties. Realizations Most 2DEGs are found in transistor-like structures made from semiconductors. The most commonly encountered 2DEG is the layer of electrons found in MOSFETs (metal-oxide-semiconductor field-effect transistors). When the transistor is in inversion mode, the electrons underneath the gate oxide are confined to the semiconductor-oxide interface, and thus occupy well defined energy levels. For thin-enough potential wells and temperatures not too high, on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semiconductor
A semiconductor is a material which has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. Its resistivity falls as its temperature rises; metals behave in the opposite way. Its conducting properties may be altered in useful ways by introducing impurities ("doping") into the crystal structure. When two differently doped regions exist in the same crystal, a semiconductor junction is created. The behavior of charge carriers, which include electrons, ions, and electron holes, at these junctions is the basis of diodes, transistors, and most modern electronics. Some examples of semiconductors are silicon, germanium, gallium arsenide, and elements near the so-called "metalloid staircase" on the periodic table. After silicon, gallium arsenide is the second-most common semiconductor and is used in laser diodes, solar cells, microwave-frequency integrated circuits, and others. Silicon is a critical element for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transistor
upright=1.4, gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (pink). A transistor is a semiconductor device used to Electronic amplifier, amplify or electronic switch, switch electrical signals and electrical power, power. The transistor is one of the basic building blocks of modern electronics. It is composed of semiconductor material, usually with at least three terminals for connection to an electronic circuit. A voltage or current applied to one pair of the transistor's terminals controls the current through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal. Some transistors are packaged individually, but many more are found embedded in integrated circuits. Austro-Hungarian physicist Julius Edgar Lilienfeld proposed the concept of a field-effect transistor in 1926, but it was not possible to actually co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quantum Hall Effect
The quantum Hall effect (or integer quantum Hall effect) is a quantized version of the Hall effect which is observed in two-dimensional electron systems subjected to low temperatures and strong magnetic fields, in which the Hall resistance exhibits steps that take on the quantized values : R_ = \frac = \frac , where is the Hall voltage, is the channel current, is the elementary charge and is Planck's constant. The divisor can take on either integer () or fractional () values. Here, is roughly but not exactly equal to the filling factor of Landau levels. The quantum Hall effect is referred to as the integer or fractional quantum Hall effect depending on whether is an integer or fraction, respectively. The striking feature of the integer quantum Hall effect is the persistence of the quantization (i.e. the Hall plateau) as the electron density is varied. Since the electron density remains constant when the Fermi level is in a clean spectral gap, this situation correspo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brown University
Brown University is a private research university in Providence, Rhode Island. Brown is the seventh-oldest institution of higher education in the United States, founded in 1764 as the College in the English Colony of Rhode Island and Providence Plantations. Brown is one of nine colonial colleges chartered before the American Revolution. Admissions at Brown is among the most selective in the United States. In 2022, the university reported a first year acceptance rate of 5%. It is a member of the Ivy League. Brown was the first college in the United States to codify in its charter that admission and instruction of students was to be equal regardless of their religious affiliation. The university is home to the oldest applied mathematics program in the United States, the oldest engineering program in the Ivy League, and the third-oldest medical program in New England. The university was one of the early doctoral-granting U.S. institutions in the late 19th century, adding ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Providence, Rhode Island
Providence is the capital and most populous city of the U.S. state of Rhode Island. One of the oldest cities in New England, it was founded in 1636 by Roger Williams, a Reformed Baptist theologian and religious exile from the Massachusetts Bay Colony. He named the area in honor of "God's merciful Providence" which he believed was responsible for revealing such a haven for him and his followers. The city developed as a busy port as it is situated at the mouth of the Providence River in Providence County, at the head of Narragansett Bay. Providence was one of the first cities in the country to industrialize and became noted for its textile manufacturing and subsequent machine tool, jewelry, and silverware industries. Today, the city of Providence is home to eight hospitals and List of colleges and universities in Rhode Island#Institutions, eight institutions of higher learning which have shifted the city's economy into service industries, though it still retains some manufacturin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhode Island
Rhode Island (, like ''road'') is a state in the New England region of the Northeastern United States. It is the smallest U.S. state by area and the seventh-least populous, with slightly fewer than 1.1 million residents as of 2020, but it is the second-most densely populated after New Jersey. It takes its name from the eponymous island, though most of its land area is on the mainland. Rhode Island borders Connecticut to the west; Massachusetts to the north and east; and the Atlantic Ocean to the south via Rhode Island Sound and Block Island Sound. It also shares a small maritime border with New York. Providence is its capital and most populous city. Native Americans lived around Narragansett Bay for thousands of years before English settlers began arriving in the early 17th century. Rhode Island was unique among the Thirteen British Colonies for being founded by a refugee, Roger Williams, who fled religious persecution from the Massachusetts Bay Colony to establis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penn State
#Redirect Pennsylvania State University The Pennsylvania State University (Penn State or PSU) is a public state-related land-grant research university with campuses and facilities throughout Pennsylvania. Founded in 1855 as the Farmers' High School of Pennsylvania, Penn State becam ... Penn State ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nara, Japan
is a prefecture of Japan located in the Kansai region of Honshu. Nara Prefecture has a population of 1,321,805 and has a geographic area of . Nara Prefecture borders Kyoto Prefecture to the north, Osaka Prefecture to the northwest, Wakayama Prefecture to the southwest, and Mie Prefecture to the east. Nara is the capital and largest city of Nara Prefecture, with other major cities including Kashihara, Ikoma, and Yamatokōriyama. Nara Prefecture is located in the center of the Kii Peninsula on Japan's Pacific Ocean coast, and is one of only eight landlocked prefectures. Nara Prefecture has the distinction of having more UNESCO World Heritage listings than any other prefecture in Japan. History Nara Prefecture region is considered one of the oldest regions in Japan, having been in existence for thousands of years, and is widely viewed as the Japanese cradle of civilization. Like Kyoto, Nara was one of Imperial Japan's earliest capital cities. The current form of Nara Prefec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wrocław
Wrocław (; , . german: Breslau, , also known by other names) is a city in southwestern Poland and the largest city in the historical region of Silesia. It lies on the banks of the Oder in the Silesian Lowlands of Central Europe, roughly from the Sudeten Mountains to the south. , the official population of Wrocław is 674,132 making it the third largest city in Poland. The population of the Wrocław metropolitan area is around 1.25 million. Wrocław is the historical capital of Silesia and Lower Silesia. Today, it is the capital of the Lower Silesian Voivodeship. The history of the city dates back over 1,000 years; at various times, it has been part of the Kingdom of Poland, the Kingdom of Bohemia, the Kingdom of Hungary, the Habsburg monarchy of Austria, the Kingdom of Prussia and Germany, until it became again part of Poland in 1945 as the result of territorial changes of Poland immediately after World War II. Wrocław is a university city with a student popula ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sendai
is the capital city of Miyagi Prefecture, the largest city in the Tōhoku region. , the city had a population of 1,091,407 in 525,828 households, and is one of Japan's 20 designated cities. The city was founded in 1600 by the ''daimyō'' Date Masamune. It is nicknamed the ; there are Japanese zelkova trees lining many of the main thoroughfares such as and . In the summer, the Sendai Tanabata Festival, the largest Tanabata festival in Japan, is held. In winter, the trees are decorated with thousands of lights for the , lasting through most of December. On 11 March 2011, coastal areas of the city suffered catastrophic damage from a magnitude 9.0 offshore earthquake,UK Foreign Office 9.0 assessment [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State College, Pennsylvania
State College is a home rule municipality in Centre County in the Commonwealth of Pennsylvania. It is a college town, dominated economically, culturally and demographically by the presence of the University Park campus of the Pennsylvania State University (Penn State). State College is the largest designated borough in Pennsylvania. It is the principal borough of the six municipalities that make up the State College area, the largest settlement in Centre County and one of the principal cities of the greater State College-DuBois Combined Statistical Area with a combined population of 236,577 as of the 2010 U.S. census. In the 2010 census, the borough population was 42,034 with approximately 105,000 living in the borough plus the surrounding townships often referred to locally as the "Centre Region". Many of these Centre Region communities also carry a "State College, PA" address although they are not part of the borough of State College. "Happy Valley" and "Lion Country" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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