Electronic topological and structural transition in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">AuIn</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>under pressure

Godwal, B. K.; Jayaraman, A.; Meenakshi, S.; Rao, Rekha; Sikka, S. K.; Vijayakumar, V.

doi:10.1103/physrevb.57.773

Cited by 62 publications

(41 citation statements)

References 26 publications

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“…This continuous and isostructural change observed in CeAl ¾ is in contrast to a volume collapse observed by other workers [63]. A similar behaviour observed in AuIn ¾ has been attributed to a Lifshitz transition [66]. The experimental observations point out that the rapid but continuous decrease in volume starts around 2 GPa and ends at GPa and the volume change exhibits a point of inflexion, indicating that the compressibility goes through a maximum.…”

Section: Compressibility Behaviourcontrasting

confidence: 37%

Pressure induced phase transition behaviour in f-electron based dialuminides

Sahu

Shekar

2000

Pramana - J Phys

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The rare-earth and actinide based compounds are endowed with several exotic physical and chemical properties due to the presence of -electrons. These properties exhibit interesting changes under the action of various thermodynamic fields and hence continues to be a subject of extensive research. For instance, under pressure, the nature of -electrons can be changed from localized to itinerant, leading to a variety of changes in their structural, physical and chemical properties. The present review on the high pressure phase transition behaviour of dialuminides of rare earths and actinides is an outcome of research in our laboratory during the last five years using a unique combination of a Guinier diffractometer and a diamond anvil cell built in-house. To bring out the correlations between the compressibility and structural behaviour with the electronic structure, we have also carried out electronic structure calculation. Further, the usefulness of Villars' three parameter structure maps in predicting pressure induced structural transitions has been explored and this has been illustrated with the available phase transition data.

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Section: Compressibility Behaviourcontrasting

confidence: 37%

Pressure induced phase transition behaviour in f-electron based dialuminides

Sahu

Shekar

2000

Pramana - J Phys

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“…In this result, the high TE performance of PbTe, which is induced by the electronic topological transition (ETT) under high-pressure [7], has been successfully obtained at room temperature by HPHT. Besides the pressure-tuning, the ETT could be also induced by alloying [7].…”

Section: Introductionmentioning

confidence: 76%

Electrical transport and thermoelectric properties of PbTe doped with Sb2Te3 prepared by high-pressure and high-temperature

Zhu

et al. 2006

Journal of Alloys and Compounds

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“…7) Moreover, these undoped PbTe samples exhibit the same characteristics as the heavily doped PbTe samples. 8) In this result, the high TE performance of PbTe, which is induced by the electronic topological transition (ETT) under high pressure, 9) have been successfully obtained at room-temperature by HPHT. Besides the pressure-tuning, the ETT could be also induced by alloying.…”

Section: Introductionmentioning

confidence: 84%

“…Besides the pressure-tuning, the ETT could be also induced by alloying. 9) In general, the internal stress achieved by alloying in samples has the same characteristics as a compressive stress achieved by physical pressing. This internal stress occurs due to lattice distortion which is resulted from the occupation of impurity-atom at the crystal lattice.…”

Section: Introductionmentioning

confidence: 99%

Composition-Dependent Thermoelectric Properties of PbTe Doped with Sb<SUB>2</SUB>Te<SUB>3</SUB>

et al. 2005

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Although there are many reports on PbTe-SnTe and Bi 2 Te 3 -Sb 2 Te 3 systems with improved thermoelectric performance due to reduced lattice thermal conductivity, only few experimental data exist on PbTe-Sb 2 Te 3 system. In this report, the composition-dependent thermoelectric properties of PbTe doped with Sb 2 Te 3 have been studied at room-temperature. It is worth noting that the lattice thermal conductivity is only about 1 W/KÁm as the contents of Sb 2 Te 3 is larger than 0.8 mol%. In addition, the figure of merit shows a maximum value of 1:03 Â 10 À3 K À1with the content of Sb 2 Te 3 at 0.8 mol% which is the highest value obtained in doped bulk PbTe samples and is several times higher than that of PbTe containing other dopants with small grain sizes. This confirms that Sb 2 Te 3 is one of the best dopants for PbTe to enhance its thermoelectric performance.

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Electronic topological and structural transition inAuIn2under pressure

Cited by 62 publications

References 26 publications

Pressure induced phase transition behaviour in f-electron based dialuminides

Pressure induced phase transition behaviour in f-electron based dialuminides

Electrical transport and thermoelectric properties of PbTe doped with Sb2Te3 prepared by high-pressure and high-temperature

Composition-Dependent Thermoelectric Properties of PbTe Doped with Sb<SUB>2</SUB>Te<SUB>3</SUB>

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