Phase transformation of the monochalcogenides SmX (X  S, Se, Te) under high pressure

Bihan, T. Le; Darracq, S.; Heathman, S.; Benedict, U.; Mattenberger, K.; Vogt, O.

doi:10.1016/0925-8388(95)01629-5

Cited by 38 publications

(45 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The valency of rare earth compounds continues to be a vivid research area [1][2][3][4][5][6][7][8][9][10][11][12]. Of particular interest are systems where valency is influenced by controllable external parameters like pressure, temperature or alloying.…”

Section: Introductionmentioning

confidence: 99%

Electronic structure of Sm and Eu chalcogenides

Svane

Santi

Szotek

et al. 2004

Physica Status Solidi (b)

View full text Add to dashboard Cite

PACS 71.15.Mb, 71.15.Nc, 71.20.Eh, 71.28.+d The ground state configuration of the monochalcogenides of Sm and Eu is determined from total energy calculations using the self-interaction corrected local-spin-density approximation. The Sm chalcogenides, with the exception of SmO, are characterized by divalent f 6 Sm ions, while all the Eu chalcogenides have divalent f 7 Eu ions in the ground state. With pressure, the Eu and Sm chalcogenides exhibit isostructural transitions into an intermediate valent state, which in the total energy calculations is represented by localized f 5 configurations on the Sm ions (f 6 on Eu ions) together with a partly occupied f-band at the Fermi level. The energy of the fundamental f → d transition, which determines the value of the semiconducting gap, is determined by total energy calculations of the charged rare earth ion (Eu + or Sm + ) in a supercell approach with one f-electron removed. The pressure coefficients are in excellent agreement with experiment, and the occurrence of isostructural transitions is intimately related to the closure of the band gap.

show abstract

Section: Introductionmentioning

confidence: 99%

Electronic structure of Sm and Eu chalcogenides

Svane

Santi

Szotek

et al. 2004

Physica Status Solidi (b)

View full text Add to dashboard Cite

show abstract

“…It is clear from Fig. 2 that phase transition B1 → B2 occurs at about 41.9 GPa and 24.9 GPa for SmS and SmSe respectively, which are close to the experimental phase transition pressure 42 GPa and 25 GPa [2]. Concisely we point that from TBIP approach the estimated value of P t is in good agreement with experimental values which are listed in Table III and furthermore we have estimated relative volume change with pressure for SmS and SmSe which are shown in Fig.…”

Section: Potential Model and Methods Of Calculationmentioning

confidence: 52%

“…The samarium monochalcogenides (SmX; X = S, Se, Te) crystallize in NaCl structure and are semiconducting with unusual gap structure (except SmO) [1,2]. Valence instabilities are observed in SmS, SmSe, and SmTe [26].…”

Section: Introductionmentioning

confidence: 99%

“…Among the other samarium monochalcogenides SmS is one of the most studied systems. Using X-ray diraction technique and synchrotron radiation Le Bihan et al [2] studied monochalcogenides of Sm up to a pressure of 55 GPa. * corresponding author; e-mail: drsadhna_in@rediffmail.com SmS and SmSe exhibit a phase transition from NaCl to CsCl type structure at 42 and 25 GPa [2].…”

Section: Introductionmentioning

confidence: 99%

“…Using X-ray diraction technique and synchrotron radiation Le Bihan et al [2] studied monochalcogenides of Sm up to a pressure of 55 GPa. * corresponding author; e-mail: drsadhna_in@rediffmail.com SmS and SmSe exhibit a phase transition from NaCl to CsCl type structure at 42 and 25 GPa [2]. At pressure less than 1.8 GPa SmS shows considerable volume collapse and change of colour but retains the same cubic structure [14].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High Pressure Phase Transition and Allied Behavior οf Samarium Compounds

Singh

Gour²,

Singh

2013

Acta Phys. Pol. A

View full text Add to dashboard Cite

A theoretical study of the phase transition of samarium monochalcogenides using three-body interaction potential model is carried out at high pressure. The three-body interaction potential includes long range Coulombic, three-body interaction forces and short range overlap repulsive forces operative up to next nearest neighbor ions. We have investigated phase transition pressures, volume collapses, elastic behavior, stability criteria and various thermo physical properties at various high pressure. The results found are well suited with available experimental data. In this paper third order elastic constants are also reported for the rst time which helps in understanding the nature of interionic forces in ionic solids which paved the experimentalist to work in specic direction.

show abstract

Figs. 94 - 127

Suski¹,

Palewski²

Pnictides and Chalcogenides II (Lanthanide Monochalcogenides)

View full text Add to dashboard Cite

Phase transformation of the monochalcogenides SmX (X  S, Se, Te) under high pressure

Cited by 38 publications

References 4 publications

Electronic structure of Sm and Eu chalcogenides

Electronic structure of Sm and Eu chalcogenides

High Pressure Phase Transition and Allied Behavior οf Samarium Compounds

Figs. 94 - 127

Contact Info

Product

Resources

About