Covalent Superconductor - Diamond


Superconductivity in diamond was achieved through heavy p-type doping by boron such that the individual doping atoms started interacting and formed an "impurity band". The superconductivity was of type-II with the critical temperature Tc = 4 K and critical magnetic field Hc = 4 T. Later, Tc ~ 11K has been achieved in homoepitaxial CVD films.

Regarding the origin of superconductivity in diamond, three alternative theories exist at the moment: conventional BCS theory based on phonon-mediated pairing, correlated impurity band theory and spin-flip-driven pairing of holes weakly localized in the vicinity of the Fermi level. Whereas there is no solid experimental support for either model, recent accurate measurements of isotopic shift of the transition temperature Tc upon boron and carbon isotopic substitutions favor the BCS theory.

Read more about this topic:  Covalent Superconductor

Other articles related to "diamond":

Jack Diamond (gangster)
... Jack "Legs" Diamond (born Jack Moran July 10, 1897 – December 18, 1931), also known as Gentleman Jack, was an Irish-American gangster in Philadelphia and New York City during the Prohibition ... and close associate of gambler Arnold Rothstein, Diamond survived a number of attempts on his life between 1916 and 1931, causing him to be known as the "clay pigeon of the underworld" ... In 1930, Diamond's nemesis Dutch Schultz remarked to his own gang, "Ain't there nobody that can shoot this guy so he don't bounce back?" ...
Diamond, Missouri - Notable People
... George Washington Carver born in Diamond, MO in 1864 ... American scientist, botanist, educator, and inventor ...
Diamond Lake, Minneapolis
... The Diamond Lake neighborhood is in the Nokomis community in Minneapolis ... It is bounded by Diamond Lake Road and 55th Street on the north, Cedar Avenue on the east, 62nd Street on the south and Interstate 35W on the west ... The Diamond Lake neighborhood, together with Hale and Page, forms the HPDL Coordinates 44°53′42″N 93°15′39″W / 44.8951°N 93.2608°W / 44.8951 -93.2608 ...
1980 In The United Kingdom - Events - September
11 September- The Marlborough diamond is stolen in London. 12 September - Marlborough diamond thieves Joseph Scalise and Arthur Rachel are arrested in Chicago after getting off a British Airways flight in the city ... However, the stolen diamond has not been found ...
Jack Diamond (gangster) - Death
... On December 18, 1931, Diamond's enemies finally caught up with him, shooting him after he had passed out at a hideout at 67 Dove Street in Albany, New York after a night party on the day ... O Albany, Democratic Party Chairman Dan O'Connell, who ran the local political machine, ordered Diamond's execution, which was carried out by the Albany Police ... Legs Diamond...called up one day and said he wanted to go into the 'insurance' business here ...

Famous quotes containing the word diamond:

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    Anne Sexton (1928–1974)

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    Horace Walpole (1717–1797)

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    Ralph Waldo Emerson (1803–1882)