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Title: Synthesis of monoclinic IrTe2 under high pressure and its physical properties

Abstract

In a pressure-temperature (P-T) diagram for synthesizing IrTe2 compounds, the well-studied trigonal (H) phase with the CdI2-type structure is stable at low pressures. The superconducting cubic (C) phase can be synthesized under higher temperatures and pressures. A rhombohedral phase with the crystal structure similar to the C phase can be made at ambient pressure; but the phase contains a high concentration of Ir deficiency. Here, we report that a rarely studied monoclinic (M) phase can be stabilized in narrow ranges of pressure and temperature in this P-T diagram. Moreover, the peculiar crystal structure of the M-IrTe2 eliminates the tendency to form Ir-Ir dimers found in the H phase. The M phase has been fully characterized by structural determination and measurements of electrical resistivity, thermoelectric power, DC magnetization, and specific heat. These physical properties have been compared with those in the H and C phases of Ir1-xTe2. Finally, we present magnetic and transport properties and specific heat of the M-IrTe2 can be fully justified by calculations with the density-functional theory.

Authors:
 [1];  [2];  [3];  [1];  [1]
  1. Univ. of Texas, Austin, TX (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Missouri, Columbia, MO (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1265846
Alternate Identifier(s):
OSTI ID: 1224648
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 15; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Li, X., Yan, J. -Q., Singh, D. J., Goodenough, J. B., and Zhou, J. -S. Synthesis of monoclinic IrTe2 under high pressure and its physical properties. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.92.155118.
Li, X., Yan, J. -Q., Singh, D. J., Goodenough, J. B., & Zhou, J. -S. Synthesis of monoclinic IrTe2 under high pressure and its physical properties. United States. https://doi.org/10.1103/PhysRevB.92.155118
Li, X., Yan, J. -Q., Singh, D. J., Goodenough, J. B., and Zhou, J. -S. 2015. "Synthesis of monoclinic IrTe2 under high pressure and its physical properties". United States. https://doi.org/10.1103/PhysRevB.92.155118. https://www.osti.gov/servlets/purl/1265846.
@article{osti_1265846,
title = {Synthesis of monoclinic IrTe2 under high pressure and its physical properties},
author = {Li, X. and Yan, J. -Q. and Singh, D. J. and Goodenough, J. B. and Zhou, J. -S.},
abstractNote = {In a pressure-temperature (P-T) diagram for synthesizing IrTe2 compounds, the well-studied trigonal (H) phase with the CdI2-type structure is stable at low pressures. The superconducting cubic (C) phase can be synthesized under higher temperatures and pressures. A rhombohedral phase with the crystal structure similar to the C phase can be made at ambient pressure; but the phase contains a high concentration of Ir deficiency. Here, we report that a rarely studied monoclinic (M) phase can be stabilized in narrow ranges of pressure and temperature in this P-T diagram. Moreover, the peculiar crystal structure of the M-IrTe2 eliminates the tendency to form Ir-Ir dimers found in the H phase. The M phase has been fully characterized by structural determination and measurements of electrical resistivity, thermoelectric power, DC magnetization, and specific heat. These physical properties have been compared with those in the H and C phases of Ir1-xTe2. Finally, we present magnetic and transport properties and specific heat of the M-IrTe2 can be fully justified by calculations with the density-functional theory.},
doi = {10.1103/PhysRevB.92.155118},
url = {https://www.osti.gov/biblio/1265846}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 15,
volume = 92,
place = {United States},
year = {Mon Oct 12 00:00:00 EDT 2015},
month = {Mon Oct 12 00:00:00 EDT 2015}
}

Journal Article:

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Cited by: 5 works
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Works referenced in this record:

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Works referencing / citing this record:

Spin freezing into a disordered state in CaFeT i 2 O 6 synthesized under high pressure
journal, August 2018