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Macroscopic evidence for quantum criticality and field-induced quantum fluctuations in cuprate superconductors

Beyer, A. D. and Zapf, V. S. and Yang, H. and Fabris, F. and Park, M. S. and Kim, K. H. and Lee, S.-I. and Yeh, N.-C. (2007) Macroscopic evidence for quantum criticality and field-induced quantum fluctuations in cuprate superconductors. Physical Review B, 76 (14). Art. No. 140506(R). ISSN 1098-0121. doi:10.1103/PhysRevB.76.140506.

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We present macroscopic experimental evidence for field-induced microscopic quantum fluctuations in different hole- and electron-type cuprate superconductors with varying doping levels and numbers of CuO2 layers per unit cell. The significant suppression of the zero-temperature in-plane magnetic irreversibility field relative to the paramagnetic field in all cuprate superconductors suggests strong quantum fluctuations due to the proximity of the cuprates to quantum criticality.

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Yeh, N.-C.0000-0002-1826-419X
Additional Information:© 2007 The American Physical Society. (Received 15 January 2007; revised 7 October 2007; published 25 October 2007) Research at Caltech was supported by NSF Grant No. DMR-0405088 and through the NHMFL. The SQUID data were taken at the Beckman Institute at Caltech. Work at Pohang University was supported by the Ministry of Science and Technology of Korea. The authors gratefully acknowledge Kazuyasu Tokiwa and Tsuneo Watanabe at the Tokyo University of Science for providing the HgBa2Ca4Cu5Ox (Hg-1245) samples.
Funding AgencyGrant Number
Ministry of Science and Technology (Korea)UNSPECIFIED
Subject Keywords:copper compounds; doping; fluctuations in superconductors; high-temperature superconductors
Issue or Number:14
Record Number:CaltechAUTHORS:BEYprb07
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9094
Deposited By: Archive Administrator
Deposited On:26 Oct 2007
Last Modified:08 Nov 2021 20:56

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