TY - JOUR
T1 - Direct correlation of phonon anomalies in NbC with fermi-surface-induced maxima in generalized susceptibilities
AU - Gupta, Michèle
AU - Freeman, A. J.
PY - 1976
Y1 - 1976
N2 - The generalized susceptibility of NbC, determined from its augmented plane wave energy band structure (with constant matrix elements), shows large maxima, arising in large part from Fermi surface "nesting," to occur at precisely those q→ values at which soft modes have been found in the phonon acoustic branches by Smith. These maxima can be represented by a warped cube of dimension ∼1.2(2πa) in momentum space, in striking agreement with the soft mode surface proposed by Weber.
AB - The generalized susceptibility of NbC, determined from its augmented plane wave energy band structure (with constant matrix elements), shows large maxima, arising in large part from Fermi surface "nesting," to occur at precisely those q→ values at which soft modes have been found in the phonon acoustic branches by Smith. These maxima can be represented by a warped cube of dimension ∼1.2(2πa) in momentum space, in striking agreement with the soft mode surface proposed by Weber.
UR - http://www.scopus.com/inward/record.url?scp=33744662201&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33744662201&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.37.364
DO - 10.1103/PhysRevLett.37.364
M3 - Article
AN - SCOPUS:33744662201
SN - 0031-9007
VL - 37
SP - 364
EP - 367
JO - Physical review letters
JF - Physical review letters
IS - 6
ER -