TY - JOUR
T1 - Tunneling effect in triangular lattice superconductor Na xCoO2
AU - Asano, Y.
AU - Tanaka, Y.
AU - Kuroki, K.
AU - Tanuma, Y.
AU - Tsuchiura, H.
AU - Kashiwaya, S.
PY - 2004/10
Y1 - 2004/10
N2 - The tunnel conductance in normal-metal/NaxCoO2 is studied theoretically, where NaCoO2 is a new superconductor discovered in a recent experiment. So far, it has been pointed out that superconductivity is characterized by an unconventional pairing symmetry and that the chiral symmetry may be broken down in the superconducting phase of NaxCoO2. Theoretical studies have suggested p, d and f wave pairing symmetries. We calculate the differential conductance of Na xCoO2 within the quasiclassical approximation by assuming the chiral p, chiral d and f wave symmetries. The results show the zero-bias conductance peak in the case of p and f wave symmetries in tunnel spectra.
AB - The tunnel conductance in normal-metal/NaxCoO2 is studied theoretically, where NaCoO2 is a new superconductor discovered in a recent experiment. So far, it has been pointed out that superconductivity is characterized by an unconventional pairing symmetry and that the chiral symmetry may be broken down in the superconducting phase of NaxCoO2. Theoretical studies have suggested p, d and f wave pairing symmetries. We calculate the differential conductance of Na xCoO2 within the quasiclassical approximation by assuming the chiral p, chiral d and f wave symmetries. The results show the zero-bias conductance peak in the case of p and f wave symmetries in tunnel spectra.
KW - Chiral superconductivity
KW - Tunnel spectra
KW - Zero-energy state
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U2 - 10.1016/j.physc.2003.12.035
DO - 10.1016/j.physc.2003.12.035
M3 - Article
AN - SCOPUS:4644221307
SN - 0921-4534
VL - 412-414
SP - 187
EP - 191
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - SPEC. ISS.
ER -