B J Powell et al 2003 J. Phys.: Condens. Matter 15 L235 doi:10.1088/0953-8984/15/14/102
B J Powell1,2, James F Annett1 and B L Györffy1
Show affiliationsWe propose a simple picture for the occurrence of superconductivity and the pressure dependence of the superconducting critical temperature, TSC, in ZrZn2. According to our hypothesis the pairing potential is independent of pressure, but the exchange splitting, Exc, leads to a pressure dependence in the (spin dependent) density of states at the Fermi level, Dσ (εF). Assuming p-wave pairing TSC is dependent on Dσ (εF) which ensures that, in the absence of non-magnetic impurities, TSC decreases as pressure is applied until it reaches a minimum in the paramagnetic state. Disorder reduces this minimum to zero, this gives the illusion that the superconductivity disappears at the same pressure as ferromagnetism does.
74.10.+v Occurrence, potential candidates
75.50.Dd Nonmetallic ferromagnetic materials
Issue 14 (16 April 2003)
Received 27 January 2003
Published 31 March 2003
B J Powell et al 2003 J. Phys.: Condens. Matter 15 L235
Antônio J R da Silva et al 2004 J. Phys.: Condens. Matter 16 8243
Neil P Oxtoby et al 2003 J. Phys.: Condens. Matter 15 8055
J H NamKoong and S H Lim 2009 J. Phys. D: Appl. Phys. 42 225003
Cao Feng et al 2009 Chinese Phys. Lett. 26 114203
A B Voitkiv and J Ullrich 2001 J. Phys. B: At. Mol. Opt. Phys. 34 4513
Ananth N Bhoj and Mark J Kushner 2004 J. Phys. D: Appl. Phys. 37 2510
J Rogel-Salazar et al 2001 J. Phys. B: At. Mol. Opt. Phys. 34 4617
Johan van de Leur 2004 J. Phys. A: Math. Gen. 37 4395
G W Mbise et al 1997 J. Phys. D: Appl. Phys. 30 2103