Low-temperature phase transition and transport properties of β-Cu2-xSe fabricated using hydrothermal synthesis and evacuating-and-encapsulating sintering

Ankam Bhaskar, Chih Hui Hu, Ching Lin Chang, Chia Jyi Liu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A series of phonon-liquid electron-crystal materials of β-Cu2-xSe (0 ≤ x ≤ 0.04) is fabricated using hydrothermal synthesis followed by evacuating-and-encapsulating sintering. These materials are characterized using powder X-ray diffraction, field-emission scanning electron micrograph, electronic and thermal transport. Low-temperature X-ray diffraction patterns along with the electronic and thermal transport data reveal that β-Cu2Se exhibit a phase transition at around 160 K. We find that all the electrical conductivity, carrier concentration and thermopower of β-Cu2-xSe increase with copper deficiency content x. A knee behavior is observed in the temperature dependence of both electrical resistivity and thermopower on cooling the samples from room temperature to around 160 K, which could be associated with the structural transition at the corresponding temperature. The thermal conductivity of β-Cu2-xSe at room temperature is found to be larger than that of α-Cu2-xSe.

Original languageEnglish
Pages (from-to)2755-2760
Number of pages6
JournalJournal of the European Ceramic Society
Volume36
Issue number11
DOIs
Publication statusPublished - 2016 Sep 1

Fingerprint

Hydrothermal synthesis
Transport properties
Sintering
Phase transitions
Thermoelectric power
Temperature
Electrons
Field emission
X ray powder diffraction
Diffraction patterns
Carrier concentration
Copper
Thermal conductivity
Cooling
Scanning
X ray diffraction
Crystals
Liquids
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

@article{e87e4cb4649642aa9ced11000fb78e96,
title = "Low-temperature phase transition and transport properties of β-Cu2-xSe fabricated using hydrothermal synthesis and evacuating-and-encapsulating sintering",
abstract = "A series of phonon-liquid electron-crystal materials of β-Cu2-xSe (0 ≤ x ≤ 0.04) is fabricated using hydrothermal synthesis followed by evacuating-and-encapsulating sintering. These materials are characterized using powder X-ray diffraction, field-emission scanning electron micrograph, electronic and thermal transport. Low-temperature X-ray diffraction patterns along with the electronic and thermal transport data reveal that β-Cu2Se exhibit a phase transition at around 160 K. We find that all the electrical conductivity, carrier concentration and thermopower of β-Cu2-xSe increase with copper deficiency content x. A knee behavior is observed in the temperature dependence of both electrical resistivity and thermopower on cooling the samples from room temperature to around 160 K, which could be associated with the structural transition at the corresponding temperature. The thermal conductivity of β-Cu2-xSe at room temperature is found to be larger than that of α-Cu2-xSe.",
author = "Ankam Bhaskar and Hu, {Chih Hui} and Chang, {Ching Lin} and Liu, {Chia Jyi}",
year = "2016",
month = "9",
day = "1",
doi = "10.1016/j.jeurceramsoc.2016.04.031",
language = "English",
volume = "36",
pages = "2755--2760",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier BV",
number = "11",

}

Low-temperature phase transition and transport properties of β-Cu2-xSe fabricated using hydrothermal synthesis and evacuating-and-encapsulating sintering. / Bhaskar, Ankam; Hu, Chih Hui; Chang, Ching Lin; Liu, Chia Jyi.

In: Journal of the European Ceramic Society, Vol. 36, No. 11, 01.09.2016, p. 2755-2760.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Low-temperature phase transition and transport properties of β-Cu2-xSe fabricated using hydrothermal synthesis and evacuating-and-encapsulating sintering

AU - Bhaskar, Ankam

AU - Hu, Chih Hui

AU - Chang, Ching Lin

AU - Liu, Chia Jyi

PY - 2016/9/1

Y1 - 2016/9/1

N2 - A series of phonon-liquid electron-crystal materials of β-Cu2-xSe (0 ≤ x ≤ 0.04) is fabricated using hydrothermal synthesis followed by evacuating-and-encapsulating sintering. These materials are characterized using powder X-ray diffraction, field-emission scanning electron micrograph, electronic and thermal transport. Low-temperature X-ray diffraction patterns along with the electronic and thermal transport data reveal that β-Cu2Se exhibit a phase transition at around 160 K. We find that all the electrical conductivity, carrier concentration and thermopower of β-Cu2-xSe increase with copper deficiency content x. A knee behavior is observed in the temperature dependence of both electrical resistivity and thermopower on cooling the samples from room temperature to around 160 K, which could be associated with the structural transition at the corresponding temperature. The thermal conductivity of β-Cu2-xSe at room temperature is found to be larger than that of α-Cu2-xSe.

AB - A series of phonon-liquid electron-crystal materials of β-Cu2-xSe (0 ≤ x ≤ 0.04) is fabricated using hydrothermal synthesis followed by evacuating-and-encapsulating sintering. These materials are characterized using powder X-ray diffraction, field-emission scanning electron micrograph, electronic and thermal transport. Low-temperature X-ray diffraction patterns along with the electronic and thermal transport data reveal that β-Cu2Se exhibit a phase transition at around 160 K. We find that all the electrical conductivity, carrier concentration and thermopower of β-Cu2-xSe increase with copper deficiency content x. A knee behavior is observed in the temperature dependence of both electrical resistivity and thermopower on cooling the samples from room temperature to around 160 K, which could be associated with the structural transition at the corresponding temperature. The thermal conductivity of β-Cu2-xSe at room temperature is found to be larger than that of α-Cu2-xSe.

UR - http://www.scopus.com/inward/record.url?scp=84992304893&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84992304893&partnerID=8YFLogxK

U2 - 10.1016/j.jeurceramsoc.2016.04.031

DO - 10.1016/j.jeurceramsoc.2016.04.031

M3 - Article

AN - SCOPUS:84992304893

VL - 36

SP - 2755

EP - 2760

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 11

ER -