Reciprocity theorem in high-temperature superconductors

Janeček, Ivan; Vašek, P.

doi:10.1016/s0921-4534(03)00738-x

Cited by 14 publications

(22 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Existence of the non-zero transverse resistance in zero magnetic field has been recently observed in different HTS materials [5,6,7,8] [6,7]. While the van der Pauw method has been used in Ref.…”

Section: Resultsmentioning

confidence: 99%

Transverse voltage in zero external magnetic fields, its scaling and violation of the time-reversal symmetry in MgB2

Vašek

Shimakage

Wang

2004

Physica C: Superconductivity and its Applications

View full text Add to dashboard Cite

The longitudinal and transverse voltages (resistances) have been measured for MgB 2 in zero external magnetic fields. Samples were prepared in the form of thin film and patterned into the usual Hall bar shape. In close vicinity of the critical temperature T c non-zero transverse resistance has been observed. Its dependence on the transport current has been also studied. New scaling between transverse and longitudinal resistivities has been observed in the form ρ xy ∼ dρ xx /dT . Several models for explanation of the observed transverse resistances and breaking of reciprocity theorem are discussed. One of the most promising explanation is based on the idea of time-reversal symmetry violation.

show abstract

Section: Resultsmentioning

confidence: 99%

Transverse voltage in zero external magnetic fields, its scaling and violation of the time-reversal symmetry in MgB2

Vašek

Shimakage

Wang

2004

Physica C: Superconductivity and its Applications

View full text Add to dashboard Cite

show abstract

“…However they did not see any such behaviour. But the violation of the reciprocity theorem has been recently confirmed [7]. One of the most interesting consequences of broken T and P symmetry is the prediction of the existence of an intrinsic orbital moment leading to the spontaneous appearance of macroscopic magnetization at the superconducting transition temperature.…”

Section: Resultsmentioning

confidence: 99%

Scaling of resistivities and guided vortex motion in MgB₂thin films

Vašek¹

2006

Supercond. Sci. Technol.

View full text Add to dashboard Cite

Abstract. Longitudinal and transverse voltages have been measured on thin films of MgB 2 with different superconducting transition widths. The study has been performed in zero and non-zero external magnetic fields. The non-zero transverse voltage has been observed in close vicinity of the critical temperature in zero external magnetic field, while further away from T c this voltage becomes zero. In magnetic field it becomes a transverse voltage which is an even function with respect to the direction of the field. The usual Hall voltage starts to appear with increasing magnetic field and in large fields the even voltage disappears and only the Hall voltage is measurable (i.e. the transverse even voltage is suppressed with increasing magnetic field and increasing transport current). New scaling between transverse and longitudinal resistivities has been observed in the formxx /dT . This correlation is valid not only in the zero magnetic field but also in nonzero magnetic field where transverse even voltage is detected. Several models trying to explain observed results are discussed. The most promising one seems to be guided motion of the vortices, though further theoretical work will be required to confirm this.

show abstract

“…Francavilla et al used for explanation of their results Glazmann model [9] based on the annihilation of vortices and antivortices created by transport current. Recently [10] has been shown that this model is not adequate enough thanks to the vortexantivortex symmetry in this system. However a non zero voltage can be observed when inducer vortices are moving under influence of any force which violate vortex-antivortex symmetry ,for example guiding force.…”

Section: Methodsmentioning

confidence: 96%

Transport in MgB₂ near critical temperature

Vašek

2006

Phys. Status Solidi (c)

View full text Add to dashboard Cite

Longitudinal and transverse voltages have been studied on samples of MgB 2 . The non-zero transverse voltage has been observed in close vicinity of critical temperature in zero external magnetic field while far enough from Tc this voltage has been zero. It merges into transverse even voltage in magnetic field which is suppressed with increasing field and increasing transport current as well. New scaling between transverse and longitudinal resistivities has been observed in the form ρ xy ~ dρ xx /dT. Several models trying to explain observed results are discussed.

show abstract

Reciprocity theorem in high-temperature superconductors

Cited by 14 publications

References 23 publications

Transverse voltage in zero external magnetic fields, its scaling and violation of the time-reversal symmetry in MgB2

Transverse voltage in zero external magnetic fields, its scaling and violation of the time-reversal symmetry in MgB2

Scaling of resistivities and guided vortex motion in MgB₂thin films

Transport in MgB₂ near critical temperature

Contact Info

Product

Resources

About

Reciprocity theorem in high-temperature superconductors

Cited by 14 publications

References 23 publications

Transverse voltage in zero external magnetic fields, its scaling and violation of the time-reversal symmetry in MgB2

Transverse voltage in zero external magnetic fields, its scaling and violation of the time-reversal symmetry in MgB2

Scaling of resistivities and guided vortex motion in MgB2thin films

Transport in MgB2 near critical temperature

Contact Info

Product

Resources

About

Scaling of resistivities and guided vortex motion in MgB₂thin films

Transport in MgB₂ near critical temperature