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Statistics and properties of coupled hole pairs in superconducting ceramics

机译:超导陶瓷中偶合孔对的统计和性质

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It is shown that in site representation the hole-pair operators obey the same commutation relations (paulionic) as the Cooper pair operators in impulse representation, although the latter describe delocalized quasiparticles. In quasi-impulse representation the hole-pair operators are also delocalized but the exact commutation relations correspond to a modified parafermi statistics [1] of rank N (N is the number of sites in a "superlattice" formed by the centers of mass of each hole pair). From this follows that one state can be occupied by up to N pairs. Even in the absence of dynamic interaction, the system of hole pairs is characterized by some immanent interaction, named after Dyson as kinematic interaction. This interaction appears because of the deviation of the quasiparticle statistics from the Bose (Fermi) statistics and its magnitude depends on the concentration of hole pairs. In spite of the non-bosonic behavior, there is no statistical prohibition on the Bose-Einstein condensation of coupled hole pairs. [References: 13]
机译:结果表明,在位点表示中,空穴对算子在脉冲表示中服从与库珀对算子相同的换向关系(质子交换),尽管后者描述了离域的准粒子。在准脉冲表示中,空穴对算子也被去局域化,但是精确的换向关系对应于秩N的修改后的帕拉菲统计[1](N是由每个重心组成的“超晶格”中的位点数孔对)。由此可知,一个状态最多可占据N对。即使没有动态相互作用,孔对系统也具有一些固有的相互作用,这被戴森(Dyson)称为运动学相互作用。之所以出现这种相互作用,是因为准粒子统计信息与Bose(Fermi)统计信息存在偏差,并且其大小取决于空穴对的浓度。尽管存在非强子行为,但对偶合孔对的玻色-爱因斯坦凝聚没有统计上的禁止。 [参考:13]

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