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Title: Destroying coherence in high-temperature superconductors with current flow

Abstract

Here, the loss of single-particle coherence going from the superconducting state to the normal state in underdoped cuprates is a dramatic effect that has yet to be understood. Here, we address this issue by performing angle resolved photoemission spectroscopy measurements in the presence of a transport current. We find that the loss of coherence is associated with the development of an onset in the resistance, in that well before the midpoint of the transition is reached, the sharp peaks in the angle resolved photoemission spectra are completely suppressed. Since the resistance onset is a signature of phase fluctuations, this implies that the loss of single-particle coherence is connected with the loss of long-range phase coherence.

Authors:
 [1];  [2];  [2];  [3];  [4];  [4];  [5]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. The Ohio State Univ., Columbus, OH (United States)
  4. Univ. Paris-Sud, Orsay Cedex (France)
  5. Univ. of Illinois at Chicago, Chicago, IL (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1324379
Report Number(s):
IS-J-9043
Journal ID: ISSN 2160-3308; PRXHAE
Grant/Contract Number:
DMR-1410364; DMR-0537588; AC02-07CH11358; AC02-06CH11357
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review. X
Additional Journal Information:
Journal Volume: 6; Journal Issue: 3; Journal ID: ISSN 2160-3308
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Kaminski, A., Rosenkranz, S., Norman, M. R., Randeria, M., Li, Z. Z., Raffy, H., and Campuzano, J. C. Destroying coherence in high-temperature superconductors with current flow. United States: N. p., 2016. Web. doi:10.1103/PhysRevX.6.031040.
Kaminski, A., Rosenkranz, S., Norman, M. R., Randeria, M., Li, Z. Z., Raffy, H., & Campuzano, J. C. Destroying coherence in high-temperature superconductors with current flow. United States. doi:10.1103/PhysRevX.6.031040.
Kaminski, A., Rosenkranz, S., Norman, M. R., Randeria, M., Li, Z. Z., Raffy, H., and Campuzano, J. C. 2016. "Destroying coherence in high-temperature superconductors with current flow". United States. doi:10.1103/PhysRevX.6.031040.
@article{osti_1324379,
title = {Destroying coherence in high-temperature superconductors with current flow},
author = {Kaminski, A. and Rosenkranz, S. and Norman, M. R. and Randeria, M. and Li, Z. Z. and Raffy, H. and Campuzano, J. C.},
abstractNote = {Here, the loss of single-particle coherence going from the superconducting state to the normal state in underdoped cuprates is a dramatic effect that has yet to be understood. Here, we address this issue by performing angle resolved photoemission spectroscopy measurements in the presence of a transport current. We find that the loss of coherence is associated with the development of an onset in the resistance, in that well before the midpoint of the transition is reached, the sharp peaks in the angle resolved photoemission spectra are completely suppressed. Since the resistance onset is a signature of phase fluctuations, this implies that the loss of single-particle coherence is connected with the loss of long-range phase coherence.},
doi = {10.1103/PhysRevX.6.031040},
journal = {Physical Review. X},
number = 3,
volume = 6,
place = {United States},
year = 2016,
month = 9
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevX.6.031040

Citation Metrics:
Cited by: 1work
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  • Here, the loss of single-particle coherence going from the superconducting state to the normal state in underdoped cuprates is a dramatic effect that has yet to be understood. Here, we address this issue by performing angle resolved photoemission spectroscopy measurements in the presence of a transport current. We find that the loss of coherence is associated with the development of an onset in the resistance, in that well before the midpoint of the transition is reached, the sharp peaks in the angle resolved photoemission spectra are completely suppressed. Since the resistance onset is a signature of phase fluctuations, this impliesmore » that the loss of single-particle coherence is connected with the loss of long-range phase coherence.« less
  • The loss of single-particle coherence going from the superconducting state to the normal state in underdoped cuprates is a dramatic effect that has yet to be understood. Here, we address this issue by performing angle resolved photoemission spectroscopy measurements in the presence of a transport current. We find that the loss of coherence is associated with the development of an onset in the resistance, in that well before the midpoint of the transition is reached, the sharp peaks in the angle resolved photoemission spectra are completely suppressed. Since the resistance onset is a signature of phase fluctuations, this implies thatmore » the loss of single-particle coherence is connected with the loss of long-range phase coherence.« less
  • The nonlinear current-voltage ({ital I}-{ital V}) characteristics are discussed in terms of thermally activated vortex-antivortex pairs in the CuO{sub 2} planes. The interaction energy of the two vortices in a pair grows linearly with their separation due to the interplane coupling. This linear interaction gives rise to a critical current which decreases linearly with the temperature. The {ital I}-{ital V} characteristic has the form {ital V}{similar to}{ital I}({ital I}{minus}{ital I}{sub {ital c}}){sup {alpha}({ital T}){minus}1}. Comparisons with experiments on Y-Ba-Cu-O are discussed. We suggest that the {ital I}-{ital V} data in the case of a magnetic field may be associated withmore » a thermal vortex-unbinding transition.« less
  • An electric field directed perpendicular to the surface of a superconductor changes the superconducting properties near the surface and creates an additional barrier for flux penetration into the sample. This effect is characterized by the value [ital l][sub [ital D]]/[xi], where [ital l][sub [ital D]] is the Debye screening length and [xi] is the coherence length, and can be neglected in conventional superconductors with [ital l][sub [ital D]][much lt][xi]. However, in high-temperature superconductors, where [ital l][sub [ital D]]/[xi][similar to]1, the effect is very pronounced and could be used for improvement of the transport critical current.
  • The relaxation of the shielding current-induced magnetic moment in YBa{sub 2}Cu{sub 3}O{sub 7} thin films, which were grown in situ, is studied as a function of temperature. Although typical relaxations cause a large amount of decay in the magnetic shielding current (on the order of 10 to 20% for the first 1,000 seconds), it is shown that this is not necessarily a serious problem for applications such as magnets operating in persistent-current modes. This is because the decay of the magnetic shielding current depends sensitively on how far away the operating current density is from the critical current density J{submore » c}. By using a quenching process the shielding current is reduced slightly below J{sub c} and the relaxation is dramatically reduced. A general relation between the relaxation rate at J{sub c} and the reduction of the relaxation rate upon lowering of the operating current is obtained and is shown to be consistent with experimental data. 14 refs., 5 figs.« less