Analysis of Temperature Dependence of Electrical Conductivity in La2NiO4.14 Single Crystal

Poirot, Nathalie; Gervais, F.

doi:10.1007/s10948-005-0076-0

Cited by 2 publications

(4 citation statements)

References 20 publications

(24 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The resistivity increases strongly when the temperature decreases, as previously reported [18], and follows a functional form R 0 .exp(T * /T ) µ (Fig. 1).…”

supporting

confidence: 85%

Nonlinear electronic transport and anomalous resistance fluctuations in the stripe state ofLa2NiO4.14

2007

View full text Add to dashboard Cite

We report on electronic transport measurements in La 2 N iO 4.14 . Non-Ohmic and hysteretic V (I) curves are measured for T 220 K. Large and non Gaussian resistance fluctuations can be observed, with strong cooling rate dependence. During a slow cooling, the resistance reaches plateaus and then suddenly jumps for T 100 K, evidencing a macroscopic freezing of the charges. Anti-correlation between timeseries of orthogonal resistances is also observed. These results are discussed in the framework of the stripes state scenario. PACS numbers: 71.27.+a, 71.45.Lr, 72.20.-i, 72.20.Ht In electronically doped Mott insulators, Coulomb interactions and antiferromagnetic interactions between magnetic ions favor localized charges, giving an insulating tendency. On the contrary, the kinetic energy of doped holes tends to delocalize the charges. The compromise has been shown to result in a charged stripes state, where charge domains are between insulating antiferromagnetic regions [1]. This state is though to be realized in layered nickelates and cuprates. Nevertheless, their transport properties exhibit a major difference. When moderately doped with holes, cuprates can become metal-like ("bad metal") and even superconducting, whereas nickelates exhibit a semiconducting temperature variation up to large hole doping. Extensive neutron scattering experiments have given compelling evidence of the stripes scenario in La 2−x Sr x NiO 4+δ [2]. Generally, "static" stripes are observed, in agreement with the insulating nature of the nickelates [3]. The stripes state can also be modeled as an electronic liquid phase, using some analogy with the liquid crystals [4]. In particular, the conducting properties of cuprates could be allowed by large transversal fluctuations in a stripe liquid [4]. Recent inelastic neutron scattering experiments seem to

show abstract

“…The resistivity increases strongly when the temperature decreases, as previously reported [18], and follows a functional form R 0 .exp(T * /T ) µ (Fig. 1).…”

supporting

confidence: 85%

Nonlinear electronic transport and anomalous resistance fluctuations in the stripe state ofLa2NiO4.14

2007

View full text Add to dashboard Cite

show abstract

“…In these complex systems characterized by a large variety of coexisting superconducting, insulating, ferromagnetic, antiferromagnetic states, X-ray illumination induces electronic and structural changes allowing tuning of material functionalities, which allow the development of many device capabilities. The electronic properties of super-oxygenated La 2 NiO 4+y have high technological interest [31][32][33][34][35][36][37][38][39]. This (A 2 MO 4+y ) system A=Ni having the K 2 NiF 4 -type structure has the ability to accommodate a large oxygen overstoichiometry.…”

Section: Introductionmentioning

confidence: 99%

“…It may be possible that oxygen interstitial ordering at room temperature can be manipulated in La 2 NiO 4+y as in the cuprate La 2 CuO 4+y . The [NiO 2 ] layers are typical charge transfer Mott insulators [31][32][33][34][35][36][37][38][39]. The Ni 2+ ion have a Ni 3d 8 configuration whereas the antiferromagnetic order is comparable to NiO.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

VUV Pump and Probe of Phase Separation and Oxygen Interstitials in La2NiO4+y Using Spectromicroscopy

et al. 2018

Self Cite

View full text Add to dashboard Cite

Abstract:While it is known that strongly correlated transition metal oxides described by a multi-band Hubbard model show microscopic multiscale phase separation, little is known about the possibility to manipulate them with vacuum ultraviolet (VUV), 27 eV lighting. We have investigated the photo-induced effects of VUV light illumination of a super-oxygenated La 2 NiO 4+y single crystal by means of scanning photoelectron microscopy. VUV light exposure induces the increase of the density of states (DOS) in the binding energy range around E b = 1.4 eV below E F . The photo-induced states in this energy region have been predicted due to clustering of oxygen interstitials by band structure calculations for large supercell of La 2 CuO 4.125 . We finally show that it is possible to generate and manipulate oxygen rich domains by VUV illumination as it was reported for X-ray illumination of La 2 CuO 4+y . This phenomenology is assigned to oxygen-interstitials ordering and clustering by photo-illumination forming segregated domains in the La 2 NiO 4+y surface.

show abstract

Analysis of Temperature Dependence of Electrical Conductivity in La2NiO4.14 Single Crystal

Abstract: Electrical resistivity of La 2 NiO 4+δ single crystals has been investigated. Results showed several anomalies that are related to the onset of spin and charge ordering, either static or dynamic.

Cited by 2 publications

References 20 publications

Nonlinear electronic transport and anomalous resistance fluctuations in the stripe state ofLa2NiO4.14

Nonlinear electronic transport and anomalous resistance fluctuations in the stripe state ofLa2NiO4.14

VUV Pump and Probe of Phase Separation and Oxygen Interstitials in La2NiO4+y Using Spectromicroscopy

Contact Info

Product

Resources

About