Abstract
Potassium molybdenum bronze, K0.30MoO3, undergoes a charge-density-wave (CDW-) driven phase transition at 180 K, below which nonlinear current-voltage characteristics are observed. Behavior is similar to that observed in NbSe3 and is currently understood based on models which involve charge transport by the CDW. The effects of impurities on CDW phenomena has been a subject of considerable interest. Two types of substitutional doping are possible in the K0.30MoO3 structure. In the alloy system, K0.30-xRbxMoO3, disorder is introduced on the alkali sublattice while in the alloy system, K0.30Mo1-xWxO3, the isoelectronic element tungsten is substituted for molybdenum. We show that the effects of tungsten substitution are very large, larger than such doping effects in other CDW systems, whereas alkali substitution produces only small effects. The data obtained on the K0.30Mo1-xWxO3 system suggest that the low-temperature CDW coherence length becomes very short at low tungsten concentrations.
| Original language | English |
|---|---|
| Pages (from-to) | 4297-4301 |
| Number of pages | 5 |
| Journal | Physical Review B |
| Volume | 30 |
| Issue number | 8 |
| DOIs | |
| State | Published - 1 Jan 1984 |
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Dramatic impurity effects on the charge-density wave in potassium molybdenum bronze. / Schneemeyer, Lynn; DiSalvo, F. J.; Spengler, S. E.; Waszczak, J. V.
In: Physical Review B, Vol. 30, No. 8, 01.01.1984, p. 4297-4301.Research output: Contribution to journal › Article
TY - JOUR
T1 - Dramatic impurity effects on the charge-density wave in potassium molybdenum bronze
AU - Schneemeyer, Lynn
AU - DiSalvo, F. J.
AU - Spengler, S. E.
AU - Waszczak, J. V.
PY - 1984/1/1
Y1 - 1984/1/1
N2 - Potassium molybdenum bronze, K0.30MoO3, undergoes a charge-density-wave (CDW-) driven phase transition at 180 K, below which nonlinear current-voltage characteristics are observed. Behavior is similar to that observed in NbSe3 and is currently understood based on models which involve charge transport by the CDW. The effects of impurities on CDW phenomena has been a subject of considerable interest. Two types of substitutional doping are possible in the K0.30MoO3 structure. In the alloy system, K0.30-xRbxMoO3, disorder is introduced on the alkali sublattice while in the alloy system, K0.30Mo1-xWxO3, the isoelectronic element tungsten is substituted for molybdenum. We show that the effects of tungsten substitution are very large, larger than such doping effects in other CDW systems, whereas alkali substitution produces only small effects. The data obtained on the K0.30Mo1-xWxO3 system suggest that the low-temperature CDW coherence length becomes very short at low tungsten concentrations.
AB - Potassium molybdenum bronze, K0.30MoO3, undergoes a charge-density-wave (CDW-) driven phase transition at 180 K, below which nonlinear current-voltage characteristics are observed. Behavior is similar to that observed in NbSe3 and is currently understood based on models which involve charge transport by the CDW. The effects of impurities on CDW phenomena has been a subject of considerable interest. Two types of substitutional doping are possible in the K0.30MoO3 structure. In the alloy system, K0.30-xRbxMoO3, disorder is introduced on the alkali sublattice while in the alloy system, K0.30Mo1-xWxO3, the isoelectronic element tungsten is substituted for molybdenum. We show that the effects of tungsten substitution are very large, larger than such doping effects in other CDW systems, whereas alkali substitution produces only small effects. The data obtained on the K0.30Mo1-xWxO3 system suggest that the low-temperature CDW coherence length becomes very short at low tungsten concentrations.
UR - http://www.scopus.com/inward/record.url?scp=0000885321&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.30.4297
DO - 10.1103/PhysRevB.30.4297
M3 - Article
AN - SCOPUS:0000885321
VL - 30
SP - 4297
EP - 4301
JO - Physical Review B
JF - Physical Review B
SN - 0163-1829
IS - 8
ER -