Phys. Rev. Lett. 83, 4622–4625 (1999)

Superconducting-Normal Phase Transition in (Ba_1-xK_x)BiO₃, x = 0.40, 0.47

Abstract

References

Citing Articles (9)

Download: PDF (911 kB) Buy this article Export: BibTeX or EndNote (RIS)

B. F. Woodfield^*, D. A. Wright, R. A. Fisher, and N. E. Phillips
Department of Chemistry, University of California and Lawrence Berkeley National Laboratory, Berkeley, California 94720

H. Y. Tang
Department of Applied Chemistry, National Chi Nan University, Puli, Nantou 545, Taiwan

Received 26 July 1999; published in the issue dated 29 November 1999

Specific-heat measurements on (Ba_1-xK_x)BiO₃, x = 0.40 and 0.47, 0.7≤T≤35K, 0≤H≤9T, have determined the coefficient (γ) of the normal-state conduction electron specific heat, and shown well-defined specific-heat anomalies at T_c that are consistent with the value of γ and BCS expressions. These results contradict the suggestion in a recent Letter that γ is several orders of magnitude greater than these experimental values and that the absence of a correspondingly large specific-heat anomaly constitutes evidence that the transition is an Ehrenfest fourth-order transition.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.83.4622

DOI:

10.1103/PhysRevLett.83.4622

PACS:

74.25.Bt, 74.25.Ha, 74.62.Dh

^*Present address: Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602.

About | Terms and Conditions | Subscriptions | Search | Help

Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.

Citation Search:

Phys. Rev. Lett. 83, 4622–4625 (1999)

Superconducting-Normal Phase Transition in (Ba1-xKx)BiO3, x = 0.40, 0.47

Superconducting-Normal Phase Transition in (Ba_1-xK_x)BiO₃, x = 0.40, 0.47