Experimental consequences of quantum critical points at high temperatures

摘要: We study the Cr_(1-x) Re_x phase diagram finding that its transition temperature towards an antiferromagnetic order T_N follows a quantum [(x_c-x)/x_c ]^{\psi} law, with {\psi}=1/2, from critical point (QCP) at x_c=0.25 up to T_N=600K. compare this system others in understand why elemental material is affected by QCP such unusually high temperatures. determine general criterion for crossover, as function of external parameter concentration, region controlled solely thermal fluctuations where effects become observable. The properties materials low coherence lengths will thus be altered far away QCP.