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Determination of dynamical exponents of graphene at quantum critical point by holography

机译:全息术测定量子临界点的石墨烯动力指数

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We calculate the transport of a theory with two conserved currents by the holographic method and compare it with graphene data to determine its dynamical exponents ( z , θ ) , which characterizes a “quantum critical point.” As a result, we find that the electric and the thermal conductivity data can be fit more naturally if we assume ( z , θ ) = ( 3 / 2 , 1 ) rather than (1,0). Furthermore, we find that thermoelectric power data at high temperature can be fit if we use ( 3 / 2 , 1 ) but not by (1,0). The θ = 1 result can be interpreted as taking into account the fermionic nature of the electrons, and z = 3 / 2 can be interpreted as the flattened band by the strong interaction.
机译:我们通过全息方法计算具有两个保守电流的理论的运输,并将其与石墨烯数据进行比较以确定其动态指数(Z,θ),其表征“量子临界点”。 结果,如果我们假设(z,θ)=(3/2,1)而不是(1,0),则可以发现电动和导热性数据可以更自然地适合。 此外,如果我们使用(3/2,1)但不是(1,0),我们发现高温下的热电电源数据可以适合。 θ= 1个结果可以解释为考虑电子的阴蒂性质,Z = 3/2可以通过强的相互作用被解释为扁平带。

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