TY - JOUR
T1 - Superconductivity in ternary silicide NaAlSi with layered diamond-like structure
AU - Kuroiwa, S.
AU - Kawashima, H.
AU - Kinoshita, H.
AU - Okabe, H.
AU - Akimitsu, J.
N1 - Funding Information:
This work was partly supported by the 21st COE Program “High-Tech Research Center” Project for Private Universities: Matching Fund Subsidy from MEXT (Ministry of Education, Culture, Sports, Science and Technology 2002–2004), and a Grant-in-Aid for Scientific Research on Priority Areas from MEXT.
PY - 2007/11/1
Y1 - 2007/11/1
N2 - We have succeeded in synthesizing a new member of ternary silicide NaAlSi with a superconducting transition temperature Tc-onset = 7 K by high pressure technique. The crystal structure of NaAlSi is the layered diamond-like structure with a space group of P4/nmm (no. 129, Z = 3) and without inversion symmetry. The superconducting properties in NaAlSi have been investigated by means of DC and AC magnetic susceptibility measurements. These magnetic responses indicate that NaAlSi belongs to a conventional type-II superconductor with a Ginzbrug-Landau parameter κ = 13.8. From the band structure calculations, we found that the hole band of Si p- and electron Al s-orbitals play an important role for the superconductivity in this system.
AB - We have succeeded in synthesizing a new member of ternary silicide NaAlSi with a superconducting transition temperature Tc-onset = 7 K by high pressure technique. The crystal structure of NaAlSi is the layered diamond-like structure with a space group of P4/nmm (no. 129, Z = 3) and without inversion symmetry. The superconducting properties in NaAlSi have been investigated by means of DC and AC magnetic susceptibility measurements. These magnetic responses indicate that NaAlSi belongs to a conventional type-II superconductor with a Ginzbrug-Landau parameter κ = 13.8. From the band structure calculations, we found that the hole band of Si p- and electron Al s-orbitals play an important role for the superconductivity in this system.
KW - NaAlSi
KW - Superconductivity
KW - Ternary silicide
KW - Type-II superconductor
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U2 - 10.1016/j.physc.2007.04.232
DO - 10.1016/j.physc.2007.04.232
M3 - Article
AN - SCOPUS:34748858522
VL - 466
SP - 11
EP - 15
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1-2
ER -