SPIN DYNAMICS OF TRIPLET PHOTOEXCITATIONS IN C-60 - EVIDENCE FOR A DYNAMIC JAHN-TELLER EFFECT

被引：15

作者：

WEI, X

VARDENY, ZV

机构：

[1] Department of Physics, University of Utah, Salt Lake City

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.52.R2317

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have used the absorption-detected magnetic-resonance (ADMR) technique to study the spin dynamics of triplet photoexcitations in C-60 molecules dispersed in polystyrene glasses. We found that the ADMR spectra contain two triplet powder patterns A and B with substantial spin reorientation dynamics, which increases with the temperature. The spin dynamics of triplet A are successfully modeled by a dynamic Jahn-TelIer effect, where the spin reorientation process is among six degenerate D-5d deformations of the excited C-60 molecule. Triplet B, however, is extrinsic in origin, with substantially different spin dynamics.

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页码：R2317 / R2320

页数：4

相关论文

共 32 条

[1] EXCHANGE OF INTERACTING NUCLEAR SPINS IN NUCLEAR MAGNETIC RESONANCE .1. INTRAMOLECULAR EXCHANGE [J].

ALEXANDER, S .

JOURNAL OF CHEMICAL PHYSICS, 1962, 37 (05) :967-&

[2] EXCHANGE OF INTERACTING NUCLEAR SPINS IN NUCLEAR MAGNETIC RESONANCE .2. CHEMICAL EXCHANGE [J].

ALEXANDER, S .

JOURNAL OF CHEMICAL PHYSICS, 1962, 37 (05) :974-&

[3] A MATHEMATICAL MODEL FOR THE NARROWING OF SPECTRAL LINES BY EXCHANGE OR MOTION [J].

ANDERSON, PW .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1954, 9 (03) :316-339

[4] THE TRIPLET-STATE OF C-60 STUDIED BY ZERO-FIELD ABSORPTION-DETECTED MAGNETIC-RESONANCE [J].

ANGERHOFER, A ;

VONSCHUTZ, JU ;

WIDMAN, D ;

MULLER, WH ;

TERMEER, HU ;

SIXL, H .

CHEMICAL PHYSICS LETTERS, 1994, 217 (04) :403-408

[5]

AUBERBACH A, 1994, PHYS REV LETT, V72, P2931

[6] ELECTRON-VIBRON INTERACTIONS IN CHARGED FULLERENES .1. BERRY PHASES [J].

AUERBACH, A ;

MANINI, N ;

TOSATTI, E .

PHYSICAL REVIEW B, 1994, 49 (18) :12998-13007

[7] PULSED EPR ON THE PHOTOEXCITED TRIPLET-STATE OF C(60)-FULLERENE [J].

BENNATI, M ;

GRUPP, A ;

MEHRING, M ;

DINSE, KP ;

FINK, J .

CHEMICAL PHYSICS LETTERS, 1992, 200 (05) :440-444

[8] STEADY-STATE AND TIME-RESOLVED DIRECT DETECTION EPR-SPECTRA OF FULLERENE TRIPLETS IN LIQUID SOLUTION AND GLASSY MATRICES - EVIDENCE FOR A DYNAMIC JAHN-TELLER EFFECT IN TRIPLET C-60 [J].

CLOSS, GL ;

GAUTAM, P ;

ZHANG, D ;

KRUSI, PJ ;

HILL, SA ;

WASSERMAN, E .

JOURNAL OF PHYSICAL CHEMISTRY, 1992, 96 (13) :5228-5231

[9] EXCITED-STATE PROPERTIES OF C60 [J].

EBBESEN, TW ;

TANIGAKI, K ;

KUROSHIMA, S .

CHEMICAL PHYSICS LETTERS, 1991, 181 (06) :501-504

[10] TRIPLET EXCITATION OF C-60 AND THE STRUCTURE OF THE CRYSTAL AT 1.2-K [J].

GROENEN, EJJ ;

POLUEKTOV, OG ;

MATSUSHITA, M ;

SCHMIDT, J ;

VANDERWAALS, JH ;

MEIJER, G .

CHEMICAL PHYSICS LETTERS, 1992, 197 (03) :314-318

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