Wavelength and photon dose dependence of infrared quenched persistent photoconductivity in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">YBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</

Bubb, D. M.; Federici, John F.; Tidrow, Steven C.; Wilber, W. D.; Kim, J.; Piqué, Alberto

doi:10.1103/physrevb.60.6827

Cited by 6 publications

(8 citation statements)

References 29 publications

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“…Recent experimental results have suggested that persistent photoconductivity in YBa 2 Cu 3 O 6+x may be explained by a model which incorporates both electrons trapped at oxygen vacancies, and resulting structural rearrangement in the basal plane [4]. Persistent photoconductivity is characterized by a long-lived photodoped state which shows no sign of relaxation below 250 K [5].…”

Section: Introductionmentioning

confidence: 99%

Cellular automata model for persistent photoconductivity in YBCO

Bubb¹,

Federici²

2000

J. Phys.: Condens. Matter

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We feel that persistent photoconductivity has lacked an adequate microscopic model to date. In an effort to remedy this, we present a cellular automata model based on the idea that trapped electrons in the basal plane lead to structural rearrangements when illuminated with light ranging from IR-UV wavelengths. We interpret our results within a single-band model for the electronic structure of YBCO and find that our results are in good agreement with previous experimental work.

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Section: Introductionmentioning

confidence: 99%

Cellular automata model for persistent photoconductivity in YBCO

Bubb¹,

Federici²

2000

J. Phys.: Condens. Matter

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“…The PPC is fully reversible and reproducible. If infrared (IR) light is used for illumination an increase in conductivity is observed as well, but with a much smaller magnitude11. But if IR illumination is performed after illumination with visible light, the PPC is reduced by about 2 – 10% even at low temperatures.…”

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confidence: 99%

“…Thus mechanism (a) explains the increase in conductivity and the shift in T c . However, it does not provide a natural explanation for the effects of IR light11. The photo-assisted oxygen ordering mechanism (b) assumes that the photons initiate a reordering of oxygen in the CuO x layers, so that longer Cu-O chain fragments are present.…”

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confidence: 99%

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Controlling the near-surface superfluid density in underdoped YBa2Cu3O6+x by photo-illumination

Stilp

Suter

Prokscha

et al. 2014

Sci Rep

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The interaction with light weakens the superconducting ground state in classical superconductors. The situation in cuprate superconductors is more complicated: illumination increases the charge carrier density, a photo-induced effect that persists below room temperature. Furthermore, systematic investigations in underdoped YBa2Cu3O6+x (YBCO) have shown an enhanced critical temperature Tc. Until now, studies of photo-persistent conductivity (PPC) have been limited to investigations of structural and transport properties, as well as the onset of superconductivity. Here we show how changes in the magnetic screening profile of YBCO in the Meissner state due to PPC can be determined on a nanometer scale utilizing low-energy muons. The data obtained reveal a strongly increased superfluid density within the first few tens of nanometers from the sample surface. Our findings suggest a non-trivial modification of the near-surface band structure and give direct evidence that the superfluid density of YBCO can be controlled by light illumination.

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“…Two predominant mechanisms have been suggested to explain PPC and PISC in oxygen deficient YBCO: a defect mechanism [11][12][13] and a photo-induced oxygen ordering mechanism [14]. In the defect mechanism, illumination of a YBa 2 Cu 3 O 6+x film generates electron-hole pairs.…”

Section: Introductionmentioning

confidence: 99%

Photon-induced switching and tunneling phenomena in a YBCO thin film junction

2005

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In the persistent photoconductivity (PPC) phenomenon, illumination of a YBa 2 Cu 3 O 6.5 thin film junction with a 1mW He-Ne laser leads to the decrease of the critical voltage (similar to the threshold voltage). The decrease of the critical voltage was reversed by illumination with incandescent light. The critical voltage across the junction was experimentally decreased and increased by alternating illumination between He-Ne laser and incandescent light. We also observed visible quenching of the photo-induced state using a 5mW He-Ne laser. Finally, the threshold behavior of the junction was destroyed by illuminating it with incandescent light.

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Wavelength and photon dose dependence of infrared quenched persistent photoconductivity inYBa2Cu3O

Cited by 6 publications

References 29 publications

Cellular automata model for persistent photoconductivity in YBCO

Cellular automata model for persistent photoconductivity in YBCO

Controlling the near-surface superfluid density in underdoped YBa2Cu3O6+x by photo-illumination

Photon-induced switching and tunneling phenomena in a YBCO thin film junction

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