Electronic structure of cerium and light rare-earth intermetallics

On the existence of heavy fermion ytterbium compounds

“…This is inherently a more complicated situation, but the heavy fermion properties evolve smoothly into those of the mixed valent materials. The mixed valent situation is partially characterized by a larger Kondo scale (typically an order of magnitude larger than the heavy fermion scale), and one can think of the completely delocalized f limit as that of TK-~ o0 [7].…”

Electronic structure of correlated electron materials from photoemission in high-quality single crystals

“…the unusual properties of heavy fermions have Magnetic susceptibility (x) measurements of sparked an avalanche of research over the last two heavy fermion compounds generally yield a Curiedecades. The reader is referred to numerous review Weiss behavior at high temperatures consistent with articles [3][4][5][6][7][8][9]. The term heavy fermion refers to a well-developed moment (see, for example, Ref.…”

“…2 Fig. 3 the spectra at resonance for CeBe are 2 13 as the quintessential trivalent Ce compound [9]. We shown with 90 meV resolution at 20 and 300 K (from have the situation that a smaller T yields a larger Ref.…”

“…Conventional band theory (i.e. the local good agreement with the GS approximation was density approximation, or LDA), however, is unable reported [9,[25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. But while early PES measureto explain the high-temperature properties as well as ments suffered from poor sample quality and somethe very heavy mass.…”

“…Indeed, PES measurements concept of a Kondo or Anderson lattice appears to on heavy fermions have been abundant (see Refs. date back to Lawrence et al [14], but the reader is [9,25], and references therein) owing to the very referred also to an excellent review of theoretical specific predictions of the GS and NCA regarding approaches by Lee et al [13].…”