TY - JOUR
T1 - Pyrochlore Oxide Superconductor Cd2Re2O7 Revisited
AU - Hiroi, Zenji
AU - Yamaura, Jun ichi
AU - Kobayashi, Tatsuo C.
AU - Matsubayashi, Yasuhito
AU - Hirai, Daigorou
N1 - Funding Information:
Acknowledgments This work was partly supported by the Core-to-Core Program for Advanced Research Networks given by Japan Society for the Promotion of Science. We thank H. Harima for providing the DOS data shown in Fig. 2. We also thank M. Takigawa, T. Hasegawa, H. Harima, and M. Dmitrii for the helpful discussion. The resistivity of crystal #10A shown in Fig. 6 was measured by Y. Irie, and the heat capacity of crystal #41A in Fig. 3(a) was measured by Y. Haraguchi.
Funding Information:
This work was partly supported by the Core-to-Core Program for Advanced Research Networks given by Japan Society for the Promotion of Science. We thank H. Harima for providing the DOS data shown in Fig. 2. We also thank M. Takigawa, T. Hasegawa, H. Harima, and M. Dmitrii for the helpful discussion. The resistivity of crystal #10A shown in Fig. 6 was measured by Y. Irie, and the heat capacity of crystal #41A in Fig. 3(a) was measured by Y. Haraguchi.
PY - 2018
Y1 - 2018
N2 - The superconducting pyrochlore oxide Cd2Re2O7 is revisited with a particular emphasis on the sample-quality issue. The compound has drawn attention as the only superconductor (Tc = 1.0 K) that has been found in the family of α-pyrochlore oxides since its discovery in 2001. Moreover, it exhibits two characteristic structural transitions from the cubic pyrochlore structure, with the inversion symmetry broken at the first one at 200 K. Recently, it has attracted increasing attention as a candidate spin–orbit coupled metal (SOCM), in which specific Fermi liquid instability is expected to lead to an odd-parity order with spontaneous inversion-symmetry breaking [L. Fu, Phys. Rev. Lett. 115, 026401 (2015)] and parity-mixing superconductivity [V. Kozii and L. Fu, Phys. Rev. Lett. 115, 207002 (2015); Y. Wang et al., Phys. Rev. B 93, 134512 (2016)]. We review our previous experimental results in comparison with those of other groups in the light of the theoretical prediction of the SOCM, which we consider meaningful and helpful for future progress in understanding this unique compound.
AB - The superconducting pyrochlore oxide Cd2Re2O7 is revisited with a particular emphasis on the sample-quality issue. The compound has drawn attention as the only superconductor (Tc = 1.0 K) that has been found in the family of α-pyrochlore oxides since its discovery in 2001. Moreover, it exhibits two characteristic structural transitions from the cubic pyrochlore structure, with the inversion symmetry broken at the first one at 200 K. Recently, it has attracted increasing attention as a candidate spin–orbit coupled metal (SOCM), in which specific Fermi liquid instability is expected to lead to an odd-parity order with spontaneous inversion-symmetry breaking [L. Fu, Phys. Rev. Lett. 115, 026401 (2015)] and parity-mixing superconductivity [V. Kozii and L. Fu, Phys. Rev. Lett. 115, 207002 (2015); Y. Wang et al., Phys. Rev. B 93, 134512 (2016)]. We review our previous experimental results in comparison with those of other groups in the light of the theoretical prediction of the SOCM, which we consider meaningful and helpful for future progress in understanding this unique compound.
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U2 - 10.7566/JPSJ.87.024702
DO - 10.7566/JPSJ.87.024702
M3 - Review article
AN - SCOPUS:85040779992
VL - 87
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 2
M1 - 024702
ER -