Interplane charge dynamics in high-temperature superconductors; charge confinement and spin gap
- Univ. of Tokyo (Japan)
The authors have studied optical and transport properties of the prototypical high-T{sub c} system La{sub 2{minus}x}Sr{sub x}CuO{sub 4} in the direction perpendicular to the CuO{sub 2} planes (c-axis direction). In the normal state, it is found that the c-axis spectral weight is suppressed over a wide energy range. This is a demonstration of {open_quotes}charge confinement{close_quotes} in the real material which has been proposed theoretically by Anderson. Upon reducing temperature the low-energy spectral weight of the underdoped compound is further reduced, due perhaps to {open_quotes}spin gap{close_quotes} effect. The suppressed spectral weight results in completely different out-of-plane charge transport in the normal state and leads to the appearance of a superconducting plasma edge within the gap region in the superconducting state.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 102552
- Report Number(s):
- CONF-9309321-; ISSN 0022-2291; TRN: 94:006112-0011
- Journal Information:
- Journal of Low Temperature Physics, Vol. 95, Issue 1-2; Conference: International workshop on cuprate and heavy fermion superconductors, Cologne (Germany), 27-30 Sep 1993; Other Information: PBD: Apr 1994
- Country of Publication:
- United States
- Language:
- English
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