Mixed state odd Hall effect in YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} with unidirectional twins
- Polo Urbo Industrial, Lorena (Brazil)
- Univ. of Sao Paulo (Brazil); and others
The authors have studied the mixed state Hall effect in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals with unidirectional twins: {rho}{sub xy}=f(H). An analysis of the Hall conductivity {sigma}{sub xy} in free flux flow regime reveals that {sigma}{sub xy} can be successfully described by two terms which are related to the quasiparticle excitations and the motion of free vortices respectively. The authors have discovered the strong twin dependence of the Hall conductivity {sigma}{sub xy} in the pinning (TAFF) regime and detected the sign reverse of the Hall conductivity {sigma}{sub xy} at changing angle {alpha} (+45{degrees} {r_arrow} {minus}45{degrees}) between current and twin plane that indicated the presence of backflow of vortices. The authors have observed that {sigma}{sub xy} tends to {minus}{infinity} while approaching the melting line. These results provide the evidence of strong planar pinning influence on the Hall conductivity.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 457261
- Report Number(s):
- CONF-960808--; CNN: Grant N610.399/92.6-360.101/94.1; Grant N92/3681-0
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 105; ISSN JLTPAC; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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