Anomalous Hall effect in the mixed state of high-temperature superconductors

Mixed-State Hall Effect inYBa2Cu3Oy/Wang1, Hong2, Horng3 1997Phys. Rev. Lett.230150View full textAdd to dashboardCite

“…The pronounced broadening of the r xx transition in a magnetic field has been extensively discussed [21,22], while the field and temperature dependence of r xy , although remarkable, are not completely understood. This behavior is similar to the observations by other groups and discussed in theories [12][13][14][15][16]23].…”

The flux-line lattice in superconductors

“…A much debated feature of HTSC's and of some conventional superconductors [see Hagen et al (1993) for a compilation] is that near T c the Hall effect observed during flux flow changes sign as a function of B or T . This sign reversal of the Hall angle is not yet fully understood though numerous explanations were suggested, e.g., large thermomagnetic effects (Freimuth et al 1991), flux flow and pinning Ting 1992 and, opposing drift of quasiparticles (Ferrell 1992), complex coefficient in the timedependent GL equation (Dorsey 1992), bound vortex-antivortex pairs (Jensen et al 1992), the energy derivative of the density of states of quasiparticles at the Fermi energy may have both signs (Kopnin et al 1993), segments of Josephson strings between the Cu-O layers (Harris et al 1993(Harris et al , 1994; see the criticising Comments by , renormalized tight-binding model (Hopfengärtner et al 1993, andunpublished 1992; Hopfengärtner notes that the sign reversal occurs at a temperature where the longitudinal resistivity is dominated by fluctuations of the order parameter ψ), fluctuations (Aronov and Rapoport 1992), vortex friction caused by Andreev reflection of electrons at the vortex core boundary (Meilikhov and Farzetdinova 1993), unusual Seebeck effect (Chen and Yang 1994), motion of vacancies in the FLL , and the difference in the electron density inside and outside the vortex core (Feigel'man et al 1994. See also the recent calculations of the Hall effect in dirty type-II superconductors by Larkin and Ovchinnikov (1995) and and the microscopic analysis by van Otterlo et al (1995).…”

“…segments of Josephson strings between the Cu-0 layers (Harris ef al 1993, 1994; see the criticizing comments by , renomalized tight-binding model (Hopfeng2rtner et a1 1993, and unpublished 1992; Hopfengwner notes that the sign reversal occurs at a temperature where the longitudinal resistivity is dominated by fluctuations of the order parameter p), fluctuations (Aronov and Rapoport 1992). vortex friction caused by Andreev reflection of electrons at the vortex core boundary (Meilikhov and Farzetdinova 1993). unusual Seebeck effect (Chen and Yang 1994), motion of vacancies in the FLL (A0 1995), and the difference in the electron density inside and outside the vortex core (Feigel'man et a1 1994,1995), and charged vortices The flux-line lattice in superconductors 1519 (Khomskii and Freimuth 1995).…”

The mixed-state Hall effect in YBa2Cu3O7/PrBa2Cu3O7 multilayers

“…One of the most striking features of mixedstate Hall effect is the Hall resistivity undergo a sign reversal from the normal state. There is a large effort to study the sign change both theoretically [4][5][6] and experimentally [3,5,7], and this behavior is believed to be attributed to an intrinsic property of vortex motion in these materials. In this paper we present the results of the sign anomaly in the YBa2Cu307/PrBa2Cu30 7 (YBCO/PBCO) systems in which the vortex dynamics is changed by the spatial variation of the vortices structure.…”